MEAN WELL DRDN40-48 is a MOSFET-based DIN rail redundancy module for nominal 48 V DC systems. Its two 36–60 V DC inputs feed one output rated 0–40 A continuously, subject to derating. It supports 1+1 and N+1 redundancy with separate DC OK alarm contacts; it is not an AC/DC power supply. Product Datasheet Download MEAN WELL DRDN40 Datasheet (PDF) The DRDN40 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model Code and Application Complete model DRDN40-48 DRDN DIN rail redundancy module. 40 40 A continuous output-current class. Voltage suffix 48 V nominal DC input; specified range 36–60 V DC. Channels Two DC input channels and one DC output channel. Applications Industrial control, semiconductor fabrication equipment, factory automation and electromechanical apparatus. The MOSFET paths reduce heat loss and input-to-output voltage difference. Select upstream power supplies and load wiring for the actual redundancy arrangement; the module does not convert AC mains into DC. Input and Output Ratings Nominal input voltage 48 V DC per input. DC input range 36–60 V DC per input. Continuous input current 0–40 A per input. Peak input current 0–60 A per input for 5 seconds. Continuous output current 0–40 A total for the single output. Peak output current, maximum 60 A total for 5 seconds. Input-to-output voltage drop, maximum 0.3 V (Vin minus Vout). Typical efficiency 98%. Input reverse current, maximum 1 mA. Input reverse voltage, maximum 65 V DC. Typical output capacitance 320 µF. Typical standby power loss 1.5 W. The two 40 A input ratings do not create an 80 A continuous output rating. Apply the output limit, upstream supply limits and derating together. Peak ratings are time-limited and do not replace continuous ratings. Fault Conditions and Monitoring Overload withstand statement The catalogue states no damage at less than 60 A for 5 seconds. Short-circuit withstand statement The catalogue states no damage at less than 60 A for 5 seconds. Input voltage alarm, each channel Below 34.2 V or above 63 V; threshold tolerance ±5%. DC OK contacts Two built-in alarm relay contacts, one for each monitored input. Closed contact: DC OK The associated PSU is on. Open contact: DC fail The associated PSU is off, or the input voltage is too high or too low. Contact rating, maximum 30 V DC / 1 A, resistive load. LED indication Green LED indicates OK; the mechanical drawing identifies LED1 and LED2. The overload and short-circuit entries specify limited no-damage conditions, not a stated current-limit, hiccup or automatic restart characteristic. Voltage-alarm thresholds describe monitoring; they are not a separate promise that the module regulates or clamps its output. Redundancy and Single-Supply Wiring 1+1 redundancy One extra PSU provides redundancy. The example uses two 40 A PSUs into one DRDN40, with the module output marked 40 A. N+1 redundancy The catalogue illustrates multiple PSU/module branches feeding a common load. Keep each module within its 40 A continuous output rating and follow the complete wiring diagram. Single-use arrangement The diagram connects one 40 A PSU to both input channels of a DRDN40 and shows a 40 A output. This reduces MOSFET stress; one PSU is still only one supply source. Use the application diagrams on catalogue page 19 to establish the complete connections. The single-use arrangement is not two independent supplies, and redundancy capability is not a basis for adding both input current ratings to the module output rating. Environment and Derating Cooling Free-air convection. Working temperature −40 to +80°C, with derating above +60°C. Working humidity 5–95% RH, non-condensing. Storage temperature −40 to +85°C. Temperature coefficient ±0.03%/°C from 0 to 60°C. Operating altitude / category 5000 m maximum; overvoltage category II. Apply the altitude-temperature derating. High-altitude derating For this fanless module, reduce permissible ambient temperature by 3.5°C per 1000 m above 2000 m (6500 ft). Component vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis. Mounting vibration Compliance with IEC61373 is listed. In vertical mounting, the temperature curve shows 100% load from −40°C through +60°C, then decreases to 40% at +80°C. The input-voltage curve is flat at 100% throughout 36–60 V DC. This does not override thermal derating or upstream supply limits. Terminals, Dimensions and Installation Dimensions (W × H × D) 55 × 125.2 × 100 mm; drawing tolerance ±1 mm. Case 923E. Upper TB1, pins 1 and 2 Alarm 1 DC OK relay contact. Upper TB2, pins 3 and 4 Alarm 2 DC OK relay contact. Upper TB3, pin 5 FG. Upper TB3, pin 6 DC output +Vout. Upper TB3, pin 7 DC output −Vout. Lower TB4, pin 1 DC input +Vin1. Lower TB4, pin 2 DC input −Vin1. Lower TB4, pin 3 DC input +Vin2. Lower TB4, pin 4 DC input −Vin2. DIN rail compatibility TS35/7.5 or TS35/15. The rail is not included. Use the terminal numbers and polarity shown in the full mechanical drawing. Install vertically for the stated temperature curve and consult the manufacturer installation instructions for the actual wiring and mounting procedure. Accessories and Scope of Supply Mounting rail Compatible TS35/7.5 or TS35/15 rail is shown for reference only and is not included. Supply and load equipment External power supplies and the load shown in the application diagrams are installation components, not an included module set. The reviewed DRDN40 pages do not give a separate manufacturer order code for an optional connector, mounting accessory or cable kit. Use confirmed installation requirements rather than treating unrelated parts as matched accessories. Safety, Isolation and EMC Listed approvals IEC62368-1, UL62368-1 and EAC TP TC 004. Withstand voltage 0.5 kV AC for IP/OP-to-chassis, IP/OP-to-relay and relay-to-chassis. Insulation resistance Greater than 100 MΩ for those same pairs at 500 V DC, 25°C and 70% RH. Conducted and radiated emissions BS EN/EN55032 (CISPR32), Class B for both. Immunity standards BS EN/EN55035; BS EN/EN61000-6-2 (BS EN/EN50082-2). ESD immunity BS EN/EN61000-4-2: Level 4, 15 kV air; Level 3, 8 kV contact; criterion A. Radiated immunity BS EN/EN61000-4-3: Level 3, 10 V/m; criterion A. EFT / burst BS EN/EN61000-4-4: Level 3, 2 kV; criterion A. Surge BS EN/EN61000-4-5: Level 3, 1 kV line-to-line and Level 3, 2 kV line-line-chassis; criterion A. Conducted immunity BS EN/EN61000-4-6: Level 3, 10 V; criterion A. Magnetic-field immunity BS EN/EN61000-4-8: Level 4, 30 A/m; criterion A. The block diagram shows MOSFET paths between DC inputs and the output, with common negative connections. The listed withstand values concern the specified chassis and relay boundaries; they are not an input-to-output galvanic-isolation rating. Confirm EMC compliance again in the completed equipment. Weight, Reliability and Reference Conditions Catalogue unit-weight reference 500 g, converted from the explicit 0.5 kg per-unit PACKING figure; not a measured net or shipping weight and not a carton-weight average. MTBF 1672.9 K hours minimum, Telcordia SR-332 (Bellcore); 499.5 K hours minimum, MIL-HDBK-217F at 25°C. These figures are not a guaranteed service life. Manufacturer warranty statement The catalogue lists a three-year warranty; applicable manufacturer terms govern coverage. Default measurement conditions Unless stated otherwise: nominal 48 V input, rated load and 25°C ambient. Datasheet revision DRDN40-SPEC, 2026-03-31; combined DRA/DRDN catalogue pages 16–20.

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MEAN WELL DRDN40-24 is a MOSFET-based DIN rail redundancy module for nominal 24 V DC systems. Its two 19–29 V DC inputs feed one output rated 0–40 A continuously, subject to derating. It supports 1+1 and N+1 redundancy with separate DC OK alarm contacts; it is not an AC/DC power supply. Product Datasheet Download MEAN WELL DRDN40 Datasheet (PDF) The DRDN40 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model Code and Application Complete model DRDN40-24 DRDN DIN rail redundancy module. 40 40 A continuous output-current class. Voltage suffix 24 V nominal DC input; specified range 19–29 V DC. Channels Two DC input channels and one DC output channel. Applications Industrial control, semiconductor fabrication equipment, factory automation and electromechanical apparatus. The MOSFET paths reduce heat loss and input-to-output voltage difference. Select upstream power supplies and load wiring for the actual redundancy arrangement; the module does not convert AC mains into DC. Input and Output Ratings Nominal input voltage 24 V DC per input. DC input range 19–29 V DC per input. Continuous input current 0–40 A per input. Peak input current 0–60 A per input for 5 seconds. Continuous output current 0–40 A total for the single output. Peak output current, maximum 60 A total for 5 seconds. Input-to-output voltage drop, maximum 0.3 V (Vin minus Vout). Typical efficiency 98%. Input reverse current, maximum 1 mA. Input reverse voltage, maximum 40 V DC. Typical output capacitance 320 µF. Typical standby power loss 1.5 W. The two 40 A input ratings do not create an 80 A continuous output rating. Apply the output limit, upstream supply limits and derating together. Peak ratings are time-limited and do not replace continuous ratings. Fault Conditions and Monitoring Overload withstand statement The catalogue states no damage at less than 60 A for 5 seconds. Short-circuit withstand statement The catalogue states no damage at less than 60 A for 5 seconds. Input voltage alarm, each channel Below 18 V or above 31 V; threshold tolerance ±5%. DC OK contacts Two built-in alarm relay contacts, one for each monitored input. Closed contact: DC OK The associated PSU is on. Open contact: DC fail The associated PSU is off, or the input voltage is too high or too low. Contact rating, maximum 30 V DC / 1 A, resistive load. LED indication Green LED indicates OK; the mechanical drawing identifies LED1 and LED2. The overload and short-circuit entries specify limited no-damage conditions, not a stated current-limit, hiccup or automatic restart characteristic. Voltage-alarm thresholds describe monitoring; they are not a separate promise that the module regulates or clamps its output. Redundancy and Single-Supply Wiring 1+1 redundancy One extra PSU provides redundancy. The example uses two 40 A PSUs into one DRDN40, with the module output marked 40 A. N+1 redundancy The catalogue illustrates multiple PSU/module branches feeding a common load. Keep each module within its 40 A continuous output rating and follow the complete wiring diagram. Single-use arrangement The diagram connects one 40 A PSU to both input channels of a DRDN40 and shows a 40 A output. This reduces MOSFET stress; one PSU is still only one supply source. Use the application diagrams on catalogue page 19 to establish the complete connections. The single-use arrangement is not two independent supplies, and redundancy capability is not a basis for adding both input current ratings to the module output rating. Environment and Derating Cooling Free-air convection. Working temperature −40 to +80°C, with derating above +60°C. Working humidity 5–95% RH, non-condensing. Storage temperature −40 to +85°C. Temperature coefficient ±0.03%/°C from 0 to 60°C. Operating altitude / category 5000 m maximum; overvoltage category II. Apply the altitude-temperature derating. High-altitude derating For this fanless module, reduce permissible ambient temperature by 3.5°C per 1000 m above 2000 m (6500 ft). Component vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis. Mounting vibration Compliance with IEC61373 is listed. In vertical mounting, the temperature curve shows 100% load from −40°C through +60°C, then decreases to 40% at +80°C. The input-voltage curve is flat at 100% throughout 19–29 V DC. This does not override thermal derating or upstream supply limits. Terminals, Dimensions and Installation Dimensions (W × H × D) 55 × 125.2 × 100 mm; drawing tolerance ±1 mm. Case 923E. Upper TB1, pins 1 and 2 Alarm 1 DC OK relay contact. Upper TB2, pins 3 and 4 Alarm 2 DC OK relay contact. Upper TB3, pin 5 FG. Upper TB3, pin 6 DC output +Vout. Upper TB3, pin 7 DC output −Vout. Lower TB4, pin 1 DC input +Vin1. Lower TB4, pin 2 DC input −Vin1. Lower TB4, pin 3 DC input +Vin2. Lower TB4, pin 4 DC input −Vin2. DIN rail compatibility TS35/7.5 or TS35/15. The rail is not included. Use the terminal numbers and polarity shown in the full mechanical drawing. Install vertically for the stated temperature curve and consult the manufacturer installation instructions for the actual wiring and mounting procedure. Accessories and Scope of Supply Mounting rail Compatible TS35/7.5 or TS35/15 rail is shown for reference only and is not included. Supply and load equipment External power supplies and the load shown in the application diagrams are installation components, not an included module set. The reviewed DRDN40 pages do not give a separate manufacturer order code for an optional connector, mounting accessory or cable kit. Use confirmed installation requirements rather than treating unrelated parts as matched accessories. Safety, Isolation and EMC Listed approvals IEC62368-1, UL62368-1 and EAC TP TC 004. Withstand voltage 0.5 kV AC for IP/OP-to-chassis, IP/OP-to-relay and relay-to-chassis. Insulation resistance Greater than 100 MΩ for those same pairs at 500 V DC, 25°C and 70% RH. Conducted and radiated emissions BS EN/EN55032 (CISPR32), Class B for both. Immunity standards BS EN/EN55035; BS EN/EN61000-6-2 (BS EN/EN50082-2). ESD immunity BS EN/EN61000-4-2: Level 4, 15 kV air; Level 3, 8 kV contact; criterion A. Radiated immunity BS EN/EN61000-4-3: Level 3, 10 V/m; criterion A. EFT / burst BS EN/EN61000-4-4: Level 3, 2 kV; criterion A. Surge BS EN/EN61000-4-5: Level 3, 1 kV line-to-line and Level 3, 2 kV line-line-chassis; criterion A. Conducted immunity BS EN/EN61000-4-6: Level 3, 10 V; criterion A. Magnetic-field immunity BS EN/EN61000-4-8: Level 4, 30 A/m; criterion A. The block diagram shows MOSFET paths between DC inputs and the output, with common negative connections. The listed withstand values concern the specified chassis and relay boundaries; they are not an input-to-output galvanic-isolation rating. Confirm EMC compliance again in the completed equipment. Weight, Reliability and Reference Conditions Catalogue unit-weight reference 500 g, converted from the explicit 0.5 kg per-unit PACKING figure; not a measured net or shipping weight and not a carton-weight average. MTBF 1672.9 K hours minimum, Telcordia SR-332 (Bellcore); 499.5 K hours minimum, MIL-HDBK-217F at 25°C. These figures are not a guaranteed service life. Manufacturer warranty statement The catalogue lists a three-year warranty; applicable manufacturer terms govern coverage. Default measurement conditions Unless stated otherwise: nominal 24 V input, rated load and 25°C ambient. Datasheet revision DRDN40-SPEC, 2026-03-31; combined DRA/DRDN catalogue pages 16–20.

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MEAN WELL DRDN40-12 is a MOSFET-based DIN rail redundancy module for nominal 12 V DC systems. Its two 9–14 V DC inputs feed one output rated 0–40 A continuously, subject to derating. It supports 1+1 and N+1 redundancy with separate DC OK alarm contacts; it is not an AC/DC power supply. Product Datasheet Download MEAN WELL DRDN40 Datasheet (PDF) The DRDN40 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model Code and Application Complete model DRDN40-12 DRDN DIN rail redundancy module. 40 40 A continuous output-current class. Voltage suffix 12 V nominal DC input; specified range 9–14 V DC. Channels Two DC input channels and one DC output channel. Applications Industrial control, semiconductor fabrication equipment, factory automation and electromechanical apparatus. The MOSFET paths reduce heat loss and input-to-output voltage difference. Select upstream power supplies and load wiring for the actual redundancy arrangement; the module does not convert AC mains into DC. Input and Output Ratings Nominal input voltage 12 V DC per input. DC input range 9–14 V DC per input. Continuous input current 0–40 A per input. Peak input current 0–60 A per input for 5 seconds. Continuous output current 0–40 A total for the single output. Peak output current, maximum 60 A total for 5 seconds. Input-to-output voltage drop, maximum 0.3 V (Vin minus Vout). Typical efficiency 98%. Input reverse current, maximum 1 mA. Input reverse voltage, maximum 40 V DC. Typical output capacitance 320 µF. Typical standby power loss 1.5 W. The two 40 A input ratings do not create an 80 A continuous output rating. Apply the output limit, upstream supply limits and derating together. Peak ratings are time-limited and do not replace continuous ratings. Fault Conditions and Monitoring Overload withstand statement The catalogue states no damage at less than 60 A for 5 seconds. Short-circuit withstand statement The catalogue states no damage at less than 60 A for 5 seconds. Input voltage alarm, each channel Below 8.5 V or above 14.7 V; threshold tolerance ±5%. DC OK contacts Two built-in alarm relay contacts, one for each monitored input. Closed contact: DC OK The associated PSU is on. Open contact: DC fail The associated PSU is off, or the input voltage is too high or too low. Contact rating, maximum 30 V DC / 1 A, resistive load. LED indication Green LED indicates OK; the mechanical drawing identifies LED1 and LED2. The overload and short-circuit entries specify limited no-damage conditions, not a stated current-limit, hiccup or automatic restart characteristic. Voltage-alarm thresholds describe monitoring; they are not a separate promise that the module regulates or clamps its output. Redundancy and Single-Supply Wiring 1+1 redundancy One extra PSU provides redundancy. The example uses two 40 A PSUs into one DRDN40, with the module output marked 40 A. N+1 redundancy The catalogue illustrates multiple PSU/module branches feeding a common load. Keep each module within its 40 A continuous output rating and follow the complete wiring diagram. Single-use arrangement The diagram connects one 40 A PSU to both input channels of a DRDN40 and shows a 40 A output. This reduces MOSFET stress; one PSU is still only one supply source. Use the application diagrams on catalogue page 19 to establish the complete connections. The single-use arrangement is not two independent supplies, and redundancy capability is not a basis for adding both input current ratings to the module output rating. Environment and Derating Cooling Free-air convection. Working temperature −40 to +80°C, with derating above +60°C. Working humidity 5–95% RH, non-condensing. Storage temperature −40 to +85°C. Temperature coefficient ±0.03%/°C from 0 to 60°C. Operating altitude / category 5000 m maximum; overvoltage category II. Apply the altitude-temperature derating. High-altitude derating For this fanless module, reduce permissible ambient temperature by 3.5°C per 1000 m above 2000 m (6500 ft). Component vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes along each X, Y and Z axis. Mounting vibration Compliance with IEC61373 is listed. In vertical mounting, the temperature curve shows 100% load from −40°C through +60°C, then decreases to 40% at +80°C. The input-voltage curve is flat at 100% throughout 9–14 V DC. This does not override thermal derating or upstream supply limits. Terminals, Dimensions and Installation Dimensions (W × H × D) 55 × 125.2 × 100 mm; drawing tolerance ±1 mm. Case 923E. Upper TB1, pins 1 and 2 Alarm 1 DC OK relay contact. Upper TB2, pins 3 and 4 Alarm 2 DC OK relay contact. Upper TB3, pin 5 FG. Upper TB3, pin 6 DC output +Vout. Upper TB3, pin 7 DC output −Vout. Lower TB4, pin 1 DC input +Vin1. Lower TB4, pin 2 DC input −Vin1. Lower TB4, pin 3 DC input +Vin2. Lower TB4, pin 4 DC input −Vin2. DIN rail compatibility TS35/7.5 or TS35/15. The rail is not included. Use the terminal numbers and polarity shown in the full mechanical drawing. Install vertically for the stated temperature curve and consult the manufacturer installation instructions for the actual wiring and mounting procedure. Accessories and Scope of Supply Mounting rail Compatible TS35/7.5 or TS35/15 rail is shown for reference only and is not included. Supply and load equipment External power supplies and the load shown in the application diagrams are installation components, not an included module set. The reviewed DRDN40 pages do not give a separate manufacturer order code for an optional connector, mounting accessory or cable kit. Use confirmed installation requirements rather than treating unrelated parts as matched accessories. Safety, Isolation and EMC Listed approvals IEC62368-1, UL62368-1 and EAC TP TC 004. Withstand voltage 0.5 kV AC for IP/OP-to-chassis, IP/OP-to-relay and relay-to-chassis. Insulation resistance Greater than 100 MΩ for those same pairs at 500 V DC, 25°C and 70% RH. Conducted and radiated emissions BS EN/EN55032 (CISPR32), Class B for both. Immunity standards BS EN/EN55035; BS EN/EN61000-6-2 (BS EN/EN50082-2). ESD immunity BS EN/EN61000-4-2: Level 4, 15 kV air; Level 3, 8 kV contact; criterion A. Radiated immunity BS EN/EN61000-4-3: Level 3, 10 V/m; criterion A. EFT / burst BS EN/EN61000-4-4: Level 3, 2 kV; criterion A. Surge BS EN/EN61000-4-5: Level 3, 1 kV line-to-line and Level 3, 2 kV line-line-chassis; criterion A. Conducted immunity BS EN/EN61000-4-6: Level 3, 10 V; criterion A. Magnetic-field immunity BS EN/EN61000-4-8: Level 4, 30 A/m; criterion A. The block diagram shows MOSFET paths between DC inputs and the output, with common negative connections. The listed withstand values concern the specified chassis and relay boundaries; they are not an input-to-output galvanic-isolation rating. Confirm EMC compliance again in the completed equipment. Weight, Reliability and Reference Conditions Catalogue unit-weight reference 500 g, converted from the explicit 0.5 kg per-unit PACKING figure; not a measured net or shipping weight and not a carton-weight average. MTBF 1672.9 K hours minimum, Telcordia SR-332 (Bellcore); 499.5 K hours minimum, MIL-HDBK-217F at 25°C. These figures are not a guaranteed service life. Manufacturer warranty statement The catalogue lists a three-year warranty; applicable manufacturer terms govern coverage. Default measurement conditions Unless stated otherwise: nominal 12 V input, rated load and 25°C ambient. Datasheet revision DRDN40-SPEC, 2026-03-31; combined DRA/DRDN catalogue pages 16–20.

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MEAN WELL DRDN20-48 is a DIN rail redundancy module for 48 V DC systems, accepting 36–60 V DC at each of its two inputs and providing up to 20 A continuous current at one combined output. It supports 1+1 and N+1 redundant power-supply arrangements, with MOSFET paths, two DC OK alarm relays and free-air convection cooling in a 32 mm-wide housing. Product Datasheet Download MEAN WELL DRDN20 Datasheet (PDF) The DRDN20 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Function Complete model DRDN20-48 Model code DRDN identifies a DIN rail redundancy module; 20 identifies the 20 A output class; 48 identifies the 48 V nominal DC system. Architecture Two DC input channels and one combined DC output, using MOSFET paths to reduce heat loss and the input-to-output voltage difference. Applications Industrial control systems, semiconductor fabrication equipment, factory automation and electromechanical equipment. Select external power supplies for the specified DC input range and required redundancy capacity. This module combines DC supplies; it does not convert an AC mains input or provide an independently regulated output voltage. DC Input and Output Nominal system / input range 48 V DC nominal; 36–60 V DC at each input. Continuous input current 0–20 A per input channel. Peak input current 0–30 A per input channel for up to 5 seconds. Continuous output current 0–20 A total at the single output. The two input ratings do not add up to a 40 A continuous-output rating. Peak output current 30 A maximum for up to 5 seconds; this is not a continuous rating. Input-to-output voltage drop 0.25 V maximum, specified as Vin − Vout. Efficiency, typical 98%. Input reverse current 1 mA maximum. Input reverse voltage 65 V DC maximum; keep normal operation within the specified 36–60 V DC input range. Output capacitance, typical 320 µF. Standby power losses, typical 1.5 W. The catalogue does not assign a separate regulated output-voltage or wattage rating. Output voltage follows the supplying DC source through the module. The 5-second peak specification does not define a permissible repetition duty cycle; keep the power supplies, load and installation within their applicable limits. Protection and Input Monitoring Overload withstand No damage under the specified condition of less than 30 A for 5 seconds. Short-circuit withstand No damage under the specified condition of less than 30 A for 5 seconds. Input-voltage alarm thresholds For each of the two inputs: below 34.2 V or above 63 V; threshold tolerance ±5%. DC OK relay channels Two built-in alarm relay contacts: Alarm1 DC OK and Alarm2 DC OK. Contact closed DC OK: the corresponding power supply is on. Contact open DC fail: the corresponding power supply is off, or its input voltage is over or under the alarm thresholds. Relay contact rating 30 V DC / 1 A maximum, resistive load. Status indicators Green LED indicates OK; the front drawing identifies LED1 and LED2. The short-duration no-damage conditions are not automatic current-limiting, continuous-fault or recovery-mode specifications. Select and protect the external power-supply circuit accordingly. The voltage-alarm thresholds describe monitoring; they do not extend the normal operating input range. Redundancy Connections 1+1 redundancy The catalogue example uses two 20 A power supplies feeding Vin1 and Vin2 of one DRDN20, with a 20 A load at Vout. One supply provides the redundant capacity. N+1 redundancy The catalogue shows multiple power-supply pairs and DRDN20 modules connected to a common load bus. Each DRDN20 output remains subject to its 20 A continuous limit. Single-supply use The page 14 single-use example connects one power supply to both input channels of each DRDN20 to reduce MOSFET stress. Follow that complete wiring diagram; it does not increase the module output-current rating. Use the complete application diagrams on PDF page 14 when designing the load bus, redundancy capacity and failure response. They show system topologies, not a guaranteed current-sharing accuracy or a separate order code for the illustrated external power supplies. Cooling, Derating and Environment Cooling / operating temperature Free-air convection; −40 to +80°C with temperature derating and vertical installation. Working humidity 5–95% RH, non-condensing. Storage temperature −40 to +85°C. Temperature coefficient ±0.03%/°C, measured over 0–60°C. Operating altitude / category Up to 5000 m; overvoltage category II. Altitude temperature derating For this fanless module, reduce the allowable ambient-temperature limit by 3.5°C per 1000 m above 2000 m. Vibration Component test: 10–500 Hz, 5 G, 10 minutes per cycle and 60 minutes on each X, Y and Z axis. Mounting compliance: IEC61373. The vertical-mounting temperature curve permits 100% load from −40°C through +60°C, then decreases to 40% load at +80°C. Apply this thermal derating together with the other operating limits. The input-voltage curve shows 100% load across the 36–60 V DC input range for DRDN20-48. This curve does not override temperature or altitude derating. Dimensions, Terminals and Accessories Dimensions, W × H × D 32 × 125.2 × 102 mm; general drawing tolerance ±1 mm; case 221D. TB1: alarm contacts Terminals 1 and 2: Alarm1 DC OK; terminals 3 and 4: Alarm2 DC OK. TB2: output and earth Terminal 5: FG; terminals 6 and 7: DC output +Vout; terminal 8: DC output −Vout. TB3: input channel 1 Terminal 1: DC input +Vin1; terminal 2: DC input −Vin1. TB3: input channel 2 Terminal 3: DC input +Vin2; terminal 4: DC input −Vin2. DIN rail Fits 35 mm DIN rail TS35/7.5 or TS35/15. The illustrated rail is not included with the unit. Match all terminals to the page 15 front-view numbering and connect FG as shown. The catalogue does not provide a separate orderable connector, rail-accessory or mounting-accessory code for this module. Follow the installation manual for wiring and installation details; these pages do not specify terminal torque, wire gauge or numerical ventilation clearances. Safety, Insulation and EMC Catalogue-listed approvals IEC62368-1, UL62368-1 and EAC TP TC004 approved. Withstand voltage 0.5 kVAC for input/output to chassis, input/output to relay, and relay to chassis. These are the stated test pairs, not a claim of input-to-output galvanic isolation. Insulation resistance Greater than 100 MΩ for input/output–chassis, input/output–relay and relay–chassis; test conditions: 500 VDC, 25°C and 70% RH. Emissions Conducted and radiated: BS EN/EN55032 (CISPR32), Class B. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2 (BS EN/EN50082-2). The immunity table lists performance criterion A for all six tests: EN61000-4-2 ESD, 15 kV air (level 4) and 8 kV contact (level 3); EN61000-4-3 radiated immunity, 10 V/m (level 3); EN61000-4-4 EFT/burst, 2 kV (level 3); EN61000-4-5 surge, 1 kV line–line and 2 kV line–line–chassis (both level 3); EN61000-4-6 conducted immunity, 10 V (level 3); and EN61000-4-8 magnetic field, 30 A/m (level 4 as printed). EMC ratings apply to the tested module. The final equipment must be checked for compliance with the applicable EMC requirements after integration. Weight, Reliability and Catalogue Conditions Catalogue unit weight 350 g (0.35 kg), catalogue packing reference per unit from the PACKING field; not a measured net or shipping weight and not an average calculated from the carton weight. MTBF 1836.0 K hours minimum, Telcordia SR-332 (Bellcore); 482.1 K hours minimum, MIL-HDBK-217F at 25°C. These reliability estimates are not guaranteed service-life values. Manufacturer warranty The catalogue states a three-year warranty; applicable manufacturer terms govern coverage. Default measurement conditions Unless otherwise specified: 48 V normal DC input, rated load and 25°C ambient. Applicable datasheet DRDN20-SPEC, 2026-03-31; combined DRA/DRDN catalogue pages 11–15.

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MEAN WELL DRDN20-24 is a DIN rail redundancy module for 24 V DC systems, accepting 19–29 V DC at each of its two inputs and providing up to 20 A continuous current at one combined output. It supports 1+1 and N+1 redundant power-supply arrangements, with MOSFET paths, two DC OK alarm relays and free-air convection cooling in a 32 mm-wide housing. Product Datasheet Download MEAN WELL DRDN20 Datasheet (PDF) The DRDN20 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Function Complete model DRDN20-24 Model code DRDN identifies a DIN rail redundancy module; 20 identifies the 20 A output class; 24 identifies the 24 V nominal DC system. Architecture Two DC input channels and one combined DC output, using MOSFET paths to reduce heat loss and the input-to-output voltage difference. Applications Industrial control systems, semiconductor fabrication equipment, factory automation and electromechanical equipment. Select external power supplies for the specified DC input range and required redundancy capacity. This module combines DC supplies; it does not convert an AC mains input or provide an independently regulated output voltage. DC Input and Output Nominal system / input range 24 V DC nominal; 19–29 V DC at each input. Continuous input current 0–20 A per input channel. Peak input current 0–30 A per input channel for up to 5 seconds. Continuous output current 0–20 A total at the single output. The two input ratings do not add up to a 40 A continuous-output rating. Peak output current 30 A maximum for up to 5 seconds; this is not a continuous rating. Input-to-output voltage drop 0.25 V maximum, specified as Vin − Vout. Efficiency, typical 98%. Input reverse current 1 mA maximum. Input reverse voltage 40 V DC maximum; keep normal operation within the specified 19–29 V DC input range. Output capacitance, typical 320 µF. Standby power losses, typical 1.5 W. The catalogue does not assign a separate regulated output-voltage or wattage rating. Output voltage follows the supplying DC source through the module. The 5-second peak specification does not define a permissible repetition duty cycle; keep the power supplies, load and installation within their applicable limits. Protection and Input Monitoring Overload withstand No damage under the specified condition of less than 30 A for 5 seconds. Short-circuit withstand No damage under the specified condition of less than 30 A for 5 seconds. Input-voltage alarm thresholds For each of the two inputs: below 18 V or above 31 V; threshold tolerance ±5%. DC OK relay channels Two built-in alarm relay contacts: Alarm1 DC OK and Alarm2 DC OK. Contact closed DC OK: the corresponding power supply is on. Contact open DC fail: the corresponding power supply is off, or its input voltage is over or under the alarm thresholds. Relay contact rating 30 V DC / 1 A maximum, resistive load. Status indicators Green LED indicates OK; the front drawing identifies LED1 and LED2. The short-duration no-damage conditions are not automatic current-limiting, continuous-fault or recovery-mode specifications. Select and protect the external power-supply circuit accordingly. The voltage-alarm thresholds describe monitoring; they do not extend the normal operating input range. Redundancy Connections 1+1 redundancy The catalogue example uses two 20 A power supplies feeding Vin1 and Vin2 of one DRDN20, with a 20 A load at Vout. One supply provides the redundant capacity. N+1 redundancy The catalogue shows multiple power-supply pairs and DRDN20 modules connected to a common load bus. Each DRDN20 output remains subject to its 20 A continuous limit. Single-supply use The page 14 single-use example connects one power supply to both input channels of each DRDN20 to reduce MOSFET stress. Follow that complete wiring diagram; it does not increase the module output-current rating. Use the complete application diagrams on PDF page 14 when designing the load bus, redundancy capacity and failure response. They show system topologies, not a guaranteed current-sharing accuracy or a separate order code for the illustrated external power supplies. Cooling, Derating and Environment Cooling / operating temperature Free-air convection; −40 to +80°C with temperature derating and vertical installation. Working humidity 5–95% RH, non-condensing. Storage temperature −40 to +85°C. Temperature coefficient ±0.03%/°C, measured over 0–60°C. Operating altitude / category Up to 5000 m; overvoltage category II. Altitude temperature derating For this fanless module, reduce the allowable ambient-temperature limit by 3.5°C per 1000 m above 2000 m. Vibration Component test: 10–500 Hz, 5 G, 10 minutes per cycle and 60 minutes on each X, Y and Z axis. Mounting compliance: IEC61373. The vertical-mounting temperature curve permits 100% load from −40°C through +60°C, then decreases to 40% load at +80°C. Apply this thermal derating together with the other operating limits. The input-voltage curve shows 100% load across the 19–29 V DC input range for DRDN20-24. This curve does not override temperature or altitude derating. Dimensions, Terminals and Accessories Dimensions, W × H × D 32 × 125.2 × 102 mm; general drawing tolerance ±1 mm; case 221D. TB1: alarm contacts Terminals 1 and 2: Alarm1 DC OK; terminals 3 and 4: Alarm2 DC OK. TB2: output and earth Terminal 5: FG; terminals 6 and 7: DC output +Vout; terminal 8: DC output −Vout. TB3: input channel 1 Terminal 1: DC input +Vin1; terminal 2: DC input −Vin1. TB3: input channel 2 Terminal 3: DC input +Vin2; terminal 4: DC input −Vin2. DIN rail Fits 35 mm DIN rail TS35/7.5 or TS35/15. The illustrated rail is not included with the unit. Match all terminals to the page 15 front-view numbering and connect FG as shown. The catalogue does not provide a separate orderable connector, rail-accessory or mounting-accessory code for this module. Follow the installation manual for wiring and installation details; these pages do not specify terminal torque, wire gauge or numerical ventilation clearances. Safety, Insulation and EMC Catalogue-listed approvals IEC62368-1, UL62368-1 and EAC TP TC004 approved. Withstand voltage 0.5 kVAC for input/output to chassis, input/output to relay, and relay to chassis. These are the stated test pairs, not a claim of input-to-output galvanic isolation. Insulation resistance Greater than 100 MΩ for input/output–chassis, input/output–relay and relay–chassis; test conditions: 500 VDC, 25°C and 70% RH. Emissions Conducted and radiated: BS EN/EN55032 (CISPR32), Class B. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2 (BS EN/EN50082-2). The immunity table lists performance criterion A for all six tests: EN61000-4-2 ESD, 15 kV air (level 4) and 8 kV contact (level 3); EN61000-4-3 radiated immunity, 10 V/m (level 3); EN61000-4-4 EFT/burst, 2 kV (level 3); EN61000-4-5 surge, 1 kV line–line and 2 kV line–line–chassis (both level 3); EN61000-4-6 conducted immunity, 10 V (level 3); and EN61000-4-8 magnetic field, 30 A/m (level 4 as printed). EMC ratings apply to the tested module. The final equipment must be checked for compliance with the applicable EMC requirements after integration. Weight, Reliability and Catalogue Conditions Catalogue unit weight 350 g (0.35 kg), catalogue packing reference per unit from the PACKING field; not a measured net or shipping weight and not an average calculated from the carton weight. MTBF 1836.0 K hours minimum, Telcordia SR-332 (Bellcore); 482.1 K hours minimum, MIL-HDBK-217F at 25°C. These reliability estimates are not guaranteed service-life values. Manufacturer warranty The catalogue states a three-year warranty; applicable manufacturer terms govern coverage. Default measurement conditions Unless otherwise specified: 24 V normal DC input, rated load and 25°C ambient. Applicable datasheet DRDN20-SPEC, 2026-03-31; combined DRA/DRDN catalogue pages 11–15.

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MEAN WELL DRDN20-12 is a DIN rail redundancy module for 12 V DC systems, accepting 9–14 V DC at each of its two inputs and providing up to 20 A continuous current at one combined output. It supports 1+1 and N+1 redundant power-supply arrangements, with MOSFET paths, two DC OK alarm relays and free-air convection cooling in a 32 mm-wide housing. Product Datasheet Download MEAN WELL DRDN20 Datasheet (PDF) The DRDN20 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Function Complete model DRDN20-12 Model code DRDN identifies a DIN rail redundancy module; 20 identifies the 20 A output class; 12 identifies the 12 V nominal DC system. Architecture Two DC input channels and one combined DC output, using MOSFET paths to reduce heat loss and the input-to-output voltage difference. Applications Industrial control systems, semiconductor fabrication equipment, factory automation and electromechanical equipment. Select external power supplies for the specified DC input range and required redundancy capacity. This module combines DC supplies; it does not convert an AC mains input or provide an independently regulated output voltage. DC Input and Output Nominal system / input range 12 V DC nominal; 9–14 V DC at each input. Continuous input current 0–20 A per input channel. Peak input current 0–30 A per input channel for up to 5 seconds. Continuous output current 0–20 A total at the single output. The two input ratings do not add up to a 40 A continuous-output rating. Peak output current 30 A maximum for up to 5 seconds; this is not a continuous rating. Input-to-output voltage drop 0.25 V maximum, specified as Vin − Vout. Efficiency, typical 98%. Input reverse current 1 mA maximum. Input reverse voltage 40 V DC maximum; keep normal operation within the specified 9–14 V DC input range. Output capacitance, typical 320 µF. Standby power losses, typical 1.5 W. The catalogue does not assign a separate regulated output-voltage or wattage rating. Output voltage follows the supplying DC source through the module. The 5-second peak specification does not define a permissible repetition duty cycle; keep the power supplies, load and installation within their applicable limits. Protection and Input Monitoring Overload withstand No damage under the specified condition of less than 30 A for 5 seconds. Short-circuit withstand No damage under the specified condition of less than 30 A for 5 seconds. Input-voltage alarm thresholds For each of the two inputs: below 8.5 V or above 14.7 V; threshold tolerance ±5%. DC OK relay channels Two built-in alarm relay contacts: Alarm1 DC OK and Alarm2 DC OK. Contact closed DC OK: the corresponding power supply is on. Contact open DC fail: the corresponding power supply is off, or its input voltage is over or under the alarm thresholds. Relay contact rating 30 V DC / 1 A maximum, resistive load. Status indicators Green LED indicates OK; the front drawing identifies LED1 and LED2. The short-duration no-damage conditions are not automatic current-limiting, continuous-fault or recovery-mode specifications. Select and protect the external power-supply circuit accordingly. The voltage-alarm thresholds describe monitoring; they do not extend the normal operating input range. Redundancy Connections 1+1 redundancy The catalogue example uses two 20 A power supplies feeding Vin1 and Vin2 of one DRDN20, with a 20 A load at Vout. One supply provides the redundant capacity. N+1 redundancy The catalogue shows multiple power-supply pairs and DRDN20 modules connected to a common load bus. Each DRDN20 output remains subject to its 20 A continuous limit. Single-supply use The page 14 single-use example connects one power supply to both input channels of each DRDN20 to reduce MOSFET stress. Follow that complete wiring diagram; it does not increase the module output-current rating. Use the complete application diagrams on PDF page 14 when designing the load bus, redundancy capacity and failure response. They show system topologies, not a guaranteed current-sharing accuracy or a separate order code for the illustrated external power supplies. Cooling, Derating and Environment Cooling / operating temperature Free-air convection; −40 to +80°C with temperature derating and vertical installation. Working humidity 5–95% RH, non-condensing. Storage temperature −40 to +85°C. Temperature coefficient ±0.03%/°C, measured over 0–60°C. Operating altitude / category Up to 5000 m; overvoltage category II. Altitude temperature derating For this fanless module, reduce the allowable ambient-temperature limit by 3.5°C per 1000 m above 2000 m. Vibration Component test: 10–500 Hz, 5 G, 10 minutes per cycle and 60 minutes on each X, Y and Z axis. Mounting compliance: IEC61373. The vertical-mounting temperature curve permits 100% load from −40°C through +60°C, then decreases to 40% load at +80°C. Apply this thermal derating together with the other operating limits. The input-voltage curve shows 100% load across the 9–14 V DC input range for DRDN20-12. This curve does not override temperature or altitude derating. Dimensions, Terminals and Accessories Dimensions, W × H × D 32 × 125.2 × 102 mm; general drawing tolerance ±1 mm; case 221D. TB1: alarm contacts Terminals 1 and 2: Alarm1 DC OK; terminals 3 and 4: Alarm2 DC OK. TB2: output and earth Terminal 5: FG; terminals 6 and 7: DC output +Vout; terminal 8: DC output −Vout. TB3: input channel 1 Terminal 1: DC input +Vin1; terminal 2: DC input −Vin1. TB3: input channel 2 Terminal 3: DC input +Vin2; terminal 4: DC input −Vin2. DIN rail Fits 35 mm DIN rail TS35/7.5 or TS35/15. The illustrated rail is not included with the unit. Match all terminals to the page 15 front-view numbering and connect FG as shown. The catalogue does not provide a separate orderable connector, rail-accessory or mounting-accessory code for this module. Follow the installation manual for wiring and installation details; these pages do not specify terminal torque, wire gauge or numerical ventilation clearances. Safety, Insulation and EMC Catalogue-listed approvals IEC62368-1, UL62368-1 and EAC TP TC004 approved. Withstand voltage 0.5 kVAC for input/output to chassis, input/output to relay, and relay to chassis. These are the stated test pairs, not a claim of input-to-output galvanic isolation. Insulation resistance Greater than 100 MΩ for input/output–chassis, input/output–relay and relay–chassis; test conditions: 500 VDC, 25°C and 70% RH. Emissions Conducted and radiated: BS EN/EN55032 (CISPR32), Class B. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2 (BS EN/EN50082-2). The immunity table lists performance criterion A for all six tests: EN61000-4-2 ESD, 15 kV air (level 4) and 8 kV contact (level 3); EN61000-4-3 radiated immunity, 10 V/m (level 3); EN61000-4-4 EFT/burst, 2 kV (level 3); EN61000-4-5 surge, 1 kV line–line and 2 kV line–line–chassis (both level 3); EN61000-4-6 conducted immunity, 10 V (level 3); and EN61000-4-8 magnetic field, 30 A/m (level 4 as printed). EMC ratings apply to the tested module. The final equipment must be checked for compliance with the applicable EMC requirements after integration. Weight, Reliability and Catalogue Conditions Catalogue unit weight 350 g (0.35 kg), catalogue packing reference per unit from the PACKING field; not a measured net or shipping weight and not an average calculated from the carton weight. MTBF 1836.0 K hours minimum, Telcordia SR-332 (Bellcore); 482.1 K hours minimum, MIL-HDBK-217F at 25°C. These reliability estimates are not guaranteed service-life values. Manufacturer warranty The catalogue states a three-year warranty; applicable manufacturer terms govern coverage. Default measurement conditions Unless otherwise specified: 12 V normal DC input, rated load and 25°C ambient. Applicable datasheet DRDN20-SPEC, 2026-03-31; combined DRA/DRDN catalogue pages 11–15.

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MEAN WELL DRA-60-24 is a single-output DIN rail power supply rated 24 V DC, 2.5 A and 60 W. It combines an internal output-voltage adjustment with external three-in-one constant-current control, in a 40 mm-wide convection-cooled enclosure. Product Datasheet Download MEAN WELL DRA-60 Datasheet (PDF) The DRA-60 section is on PDF pages 6, 7, 8, 9, 10. Refer to the complete mechanical drawings and notes when planning installation. Model Identification Complete model DRA-60-24 Product type Single-output AC/DC DIN rail power supply with external output-current adjustment. Model code DRA-60 identifies the family; 24 identifies the nominal DC output voltage. Use the actual model-specific current and power ratings below. Applications Machine-vision inspection and plant-cultivation systems, subject to load and installation compatibility. DC Output Rated output 24 V DC; 2.5 A rated current; 60 W rated power. Current range 0–2.5 A is the specified output-current range. It does not mean the external adjustment signal can reduce the output to 0 A. Constant-current region 3–24 V as tabulated; the highest achievable output voltage in constant-current operation depends on the end-system configuration. Output-voltage adjustment 24–30 V using the internal potentiometer marked +V ADJ. Observe both current and power limits. Ripple and noise, maximum 150 mVp-p. Voltage tolerance / line / load regulation ±1.0% / ±0.5% / ±0.5%. Voltage tolerance includes setup tolerance, line regulation and load regulation. Efficiency, typical 87% under the stated catalogue test conditions. The application diagram distinguishes constant-voltage operation, constant-current operation and the hiccup-protection region below 3 V. Confirm compatibility with the intended load. Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Three-in-One Output-Current Adjustment Connection Apply the external control between DIM+ and DIM−. Do not connect DIM− to the DC output −V. DC control voltage, typical 1–10 VDC: each 1 V increment corresponds to a 10% rated-current increment, from 10% at 1 V through 100% at 10 V. PWM control, typical 10 V PWM, 100 Hz–3 kHz. Duty cycles from 10% through 100% correspond to 10% through 100% of rated current. Resistance control, typical For one supply, 10–100 kΩ in 10 kΩ steps corresponds to 10–100% of rated current in 10% steps. Simultaneous control of N supplies The reference resistance is divided by N: 10 kΩ/N through 100 kΩ/N for the same 10–100% current settings. This is a control-input arrangement, not an output-paralleling rating. Open control input, typical The adjustment tables show 102–108% of rated current with the control input open. This is not an additional continuous-power rating; the rated power and applicable derating limits still apply. Current adjustment alone cannot reduce the output to 0 A. For zero output current, follow the catalogue’s external switch-and-relay application diagram, which interrupts the AC line feeding the supply. The external adjuster, switch and relay are application components; their order codes, contact ratings and inclusion with the power supply are not specified here. Input and Starting AC input 90–264 VAC, universal full-range input; 47–63 Hz. Apply input-voltage derating at low line. DC input 127–370 VDC, connected with positive to AC/L and negative to AC/N; maintain the FG protective-earth connection. AC current, typical 1.3 A at 115 VAC; 0.8 A at 230 VAC. Cold-start inrush current, typical 30 A at 115 VAC; 60 A at 230 VAC. Setup / rise time 400 / 90 ms at 230 VAC; 800 / 90 ms at 115 VAC, at full load. Hold-up time, typical 50 ms at 230 VAC; 10 ms at 115 VAC, at full load. Setup time is measured at the first cold start. Turning the input power on and off may increase setup time. Protection Short-circuit / overload The overload threshold is 95–108% of rated output power. Constant-current limiting recovers automatically after the fault condition is removed; the application diagram also identifies the low-voltage hiccup region. Overvoltage 28.98–37.26 V; output shutdown, re-power to recover. Protection thresholds do not authorize continuous operation above the rated power. Cooling, Derating and Environment Cooling and operating range Free-air convection; −30 to +70°C, subject to the vertical-installation curve. The shaded −30 to −20°C portion is specified for 230 VAC input only. Vertical thermal curve 100% load through 50°C, falling to 60% at 70°C. Follow the plotted line between these points and the low-temperature input restriction. Input-voltage curve At 60 Hz: 90% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 264 VAC. Working humidity 20–90% RH, non-condensing. Storage −40 to +85°C; 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. High-altitude temperature derating For this fanless design, reduce the permitted ambient temperature by 3.5°C per 1,000 m above 2,000 m (6,500 ft). Apply input-voltage and ambient-temperature restrictions together. The upper operating temperature is not an unconditional full-power rating. Dimensions, Terminals and Installation Dimensions, W × H × D 40 × 90 × 100 mm; drawing tolerance ±1 mm; case 962A. Upper terminals, left to right as drawn +V, +V, −V, −V, DIM−, DIM+. Adjacent terminal pitch is 5 mm. Lower terminals, left to right as drawn FG, N, L. Adjacent terminal pitch is 7.5 mm. Front controls and indication +V ADJ potentiometer and DC OK power-on LED. The indicator is not a separate relay-contact output. DIN rail Fits TS35/7.5 or TS35/15. The rail shown is for reference and is not included with the unit. Recommended clearance at continuous full power 40 mm above, 20 mm below and 5 mm on each side; 15 mm is recommended when the adjacent device is a heat source. Install vertically and follow the supplied unit’s installation instructions. The catalogue does not give a separate complete order code for a model-specific mounting accessory or external adjustment device. Do not treat the illustrated external switching components as included accessories. Safety, EMC and Test Conditions Safety standards UL62368-1, TUV BS EN/EN62368-1 and EAC TP TC004 are listed as approved; the catalogue states Pass LPS. Withstand voltage Input to output: 3 kVAC; input to FG: 2 kVAC; output to FG: 0.5 kVAC. Insulation resistance 100 MΩ for input/output, input/FG and output/FG at 500 VDC, 25°C and 70% RH. EMC emissions BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020. EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035; BS EN/EN61204-3, light-industry level, criteria A; EAC TP TC020. Default measurement conditions Unless stated otherwise: 230 VAC input, rated load and 25°C ambient. This power supply is a component for incorporation into final equipment. Reconfirm EMC compliance of the completed equipment. Weight and Reliability Single-unit catalogue weight 300 g (0.3 kg), from the PACKING entry. This is the single-unit catalogue reference, not the carton gross weight or a shipping-weight promise. Packing reference 42 pieces / 13.6 kg / 0.82 CUFT. MTBF, minimum catalogue estimates 2930.8 thousand hours, Telcordia SR-332 (Bellcore); 436.4 thousand hours, MIL-HDBK-217F at 25°C. Factory test / warranty 100% full-load burn-in test; the catalogue lists a 3-year manufacturer warranty, subject to the applicable terms. MTBF values are statistical estimates under the named methods, not guaranteed service life.

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MEAN WELL DRA-60-12 is a single-output DIN rail power supply rated 12 V DC, 5 A and 60 W. It combines an internal output-voltage adjustment with external three-in-one constant-current control, in a 40 mm-wide convection-cooled enclosure. Product Datasheet Download MEAN WELL DRA-60 Datasheet (PDF) The DRA-60 section is on PDF pages 6, 7, 8, 9, 10. Refer to the complete mechanical drawings and notes when planning installation. Model Identification Complete model DRA-60-12 Product type Single-output AC/DC DIN rail power supply with external output-current adjustment. Model code DRA-60 identifies the family; 12 identifies the nominal DC output voltage. Use the actual model-specific current and power ratings below. Applications Machine-vision inspection and plant-cultivation systems, subject to load and installation compatibility. DC Output Rated output 12 V DC; 5 A rated current; 60 W rated power. Current range 0–5 A is the specified output-current range. It does not mean the external adjustment signal can reduce the output to 0 A. Constant-current region 3–12 V as tabulated; the highest achievable output voltage in constant-current operation depends on the end-system configuration. Output-voltage adjustment 12–15 V using the internal potentiometer marked +V ADJ. Observe both current and power limits. Ripple and noise, maximum 120 mVp-p. Voltage tolerance / line / load regulation ±1.0% / ±0.5% / ±0.5%. Voltage tolerance includes setup tolerance, line regulation and load regulation. Efficiency, typical 85% under the stated catalogue test conditions. The application diagram distinguishes constant-voltage operation, constant-current operation and the hiccup-protection region below 3 V. Confirm compatibility with the intended load. Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Three-in-One Output-Current Adjustment Connection Apply the external control between DIM+ and DIM−. Do not connect DIM− to the DC output −V. DC control voltage, typical 1–10 VDC: each 1 V increment corresponds to a 10% rated-current increment, from 10% at 1 V through 100% at 10 V. PWM control, typical 10 V PWM, 100 Hz–3 kHz. Duty cycles from 10% through 100% correspond to 10% through 100% of rated current. Resistance control, typical For one supply, 10–100 kΩ in 10 kΩ steps corresponds to 10–100% of rated current in 10% steps. Simultaneous control of N supplies The reference resistance is divided by N: 10 kΩ/N through 100 kΩ/N for the same 10–100% current settings. This is a control-input arrangement, not an output-paralleling rating. Open control input, typical The adjustment tables show 102–108% of rated current with the control input open. This is not an additional continuous-power rating; the rated power and applicable derating limits still apply. Current adjustment alone cannot reduce the output to 0 A. For zero output current, follow the catalogue’s external switch-and-relay application diagram, which interrupts the AC line feeding the supply. The external adjuster, switch and relay are application components; their order codes, contact ratings and inclusion with the power supply are not specified here. Input and Starting AC input 90–264 VAC, universal full-range input; 47–63 Hz. Apply input-voltage derating at low line. DC input 127–370 VDC, connected with positive to AC/L and negative to AC/N; maintain the FG protective-earth connection. AC current, typical 1.3 A at 115 VAC; 0.8 A at 230 VAC. Cold-start inrush current, typical 30 A at 115 VAC; 60 A at 230 VAC. Setup / rise time 400 / 90 ms at 230 VAC; 800 / 90 ms at 115 VAC, at full load. Hold-up time, typical 50 ms at 230 VAC; 10 ms at 115 VAC, at full load. Setup time is measured at the first cold start. Turning the input power on and off may increase setup time. Protection Short-circuit / overload The overload threshold is 95–108% of rated output power. Constant-current limiting recovers automatically after the fault condition is removed; the application diagram also identifies the low-voltage hiccup region. Overvoltage 14.49–18.63 V; output shutdown, re-power to recover. Protection thresholds do not authorize continuous operation above the rated power. Cooling, Derating and Environment Cooling and operating range Free-air convection; −30 to +70°C, subject to the vertical-installation curve. The shaded −30 to −20°C portion is specified for 230 VAC input only. Vertical thermal curve 100% load through 50°C, falling to 60% at 70°C. Follow the plotted line between these points and the low-temperature input restriction. Input-voltage curve At 60 Hz: 90% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 264 VAC. Working humidity 20–90% RH, non-condensing. Storage −40 to +85°C; 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. High-altitude temperature derating For this fanless design, reduce the permitted ambient temperature by 3.5°C per 1,000 m above 2,000 m (6,500 ft). Apply input-voltage and ambient-temperature restrictions together. The upper operating temperature is not an unconditional full-power rating. Dimensions, Terminals and Installation Dimensions, W × H × D 40 × 90 × 100 mm; drawing tolerance ±1 mm; case 962A. Upper terminals, left to right as drawn +V, +V, −V, −V, DIM−, DIM+. Adjacent terminal pitch is 5 mm. Lower terminals, left to right as drawn FG, N, L. Adjacent terminal pitch is 7.5 mm. Front controls and indication +V ADJ potentiometer and DC OK power-on LED. The indicator is not a separate relay-contact output. DIN rail Fits TS35/7.5 or TS35/15. The rail shown is for reference and is not included with the unit. Recommended clearance at continuous full power 40 mm above, 20 mm below and 5 mm on each side; 15 mm is recommended when the adjacent device is a heat source. Install vertically and follow the supplied unit’s installation instructions. The catalogue does not give a separate complete order code for a model-specific mounting accessory or external adjustment device. Do not treat the illustrated external switching components as included accessories. Safety, EMC and Test Conditions Safety standards UL62368-1, TUV BS EN/EN62368-1 and EAC TP TC004 are listed as approved; the catalogue states Pass LPS. Withstand voltage Input to output: 3 kVAC; input to FG: 2 kVAC; output to FG: 0.5 kVAC. Insulation resistance 100 MΩ for input/output, input/FG and output/FG at 500 VDC, 25°C and 70% RH. EMC emissions BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020. EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035; BS EN/EN61204-3, light-industry level, criteria A; EAC TP TC020. Default measurement conditions Unless stated otherwise: 230 VAC input, rated load and 25°C ambient. This power supply is a component for incorporation into final equipment. Reconfirm EMC compliance of the completed equipment. Weight and Reliability Single-unit catalogue weight 300 g (0.3 kg), from the PACKING entry. This is the single-unit catalogue reference, not the carton gross weight or a shipping-weight promise. Packing reference 42 pieces / 13.6 kg / 0.82 CUFT. MTBF, minimum catalogue estimates 2930.8 thousand hours, Telcordia SR-332 (Bellcore); 436.4 thousand hours, MIL-HDBK-217F at 25°C. Factory test / warranty 100% full-load burn-in test; the catalogue lists a 3-year manufacturer warranty, subject to the applicable terms. MTBF values are statistical estimates under the named methods, not guaranteed service life.

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MEAN WELL DRA-40-24 is a single-output DIN rail power supply rated 24 V DC, 1.7 A and 40.8 W. It combines an internal output-voltage adjustment with external three-in-one constant-current control, in a 40 mm-wide convection-cooled enclosure. Product Datasheet Download MEAN WELL DRA-40 Datasheet (PDF) The DRA-40 section is on PDF pages 1, 2, 3, 4, 5. Refer to the complete mechanical drawings and notes when planning installation. Model Identification Complete model DRA-40-24 Product type Single-output AC/DC DIN rail power supply with external output-current adjustment. Model code DRA-40 identifies the family; 24 identifies the nominal DC output voltage. Use the actual model-specific current and power ratings below. Applications Machine-vision inspection and plant-cultivation systems, subject to load and installation compatibility. DC Output Rated output 24 V DC; 1.7 A rated current; 40.8 W rated power. Current range 0–1.7 A is the specified output-current range. It does not mean the external adjustment signal can reduce the output to 0 A. Constant-current region 3–24 V as tabulated; the highest achievable output voltage in constant-current operation depends on the end-system configuration. Output-voltage adjustment 24–30 V using the internal potentiometer marked +V ADJ. Observe both current and power limits. Ripple and noise, maximum 150 mVp-p. Voltage tolerance / line / load regulation ±1.0% / ±0.5% / ±0.5%. Voltage tolerance includes setup tolerance, line regulation and load regulation. Efficiency, typical 87% under the stated catalogue test conditions. The application diagram distinguishes constant-voltage operation, constant-current operation and the hiccup-protection region below 3 V. Confirm compatibility with the intended load. Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Three-in-One Output-Current Adjustment Connection Apply the external control between DIM+ and DIM−. Do not connect DIM− to the DC output −V. DC control voltage, typical 1–10 VDC: each 1 V increment corresponds to a 10% rated-current increment, from 10% at 1 V through 100% at 10 V. PWM control, typical 10 V PWM, 100 Hz–3 kHz. Duty cycles from 10% through 100% correspond to 10% through 100% of rated current. Resistance control, typical For one supply, 10–100 kΩ in 10 kΩ steps corresponds to 10–100% of rated current in 10% steps. Simultaneous control of N supplies The reference resistance is divided by N: 10 kΩ/N through 100 kΩ/N for the same 10–100% current settings. This is a control-input arrangement, not an output-paralleling rating. Open control input, typical The adjustment tables show 102–108% of rated current with the control input open. This is not an additional continuous-power rating; the rated power and applicable derating limits still apply. Current adjustment alone cannot reduce the output to 0 A. For zero output current, follow the catalogue’s external switch-and-relay application diagram, which interrupts the AC line feeding the supply. The external adjuster, switch and relay are application components; their order codes, contact ratings and inclusion with the power supply are not specified here. Input and Starting AC input 90–264 VAC, universal full-range input; 47–63 Hz. Apply input-voltage derating at low line. DC input 127–370 VDC, connected with positive to AC/L and negative to AC/N; maintain the FG protective-earth connection. AC current, typical 0.8 A at 115 VAC; 0.6 A at 230 VAC. Cold-start inrush current, typical 30 A at 115 VAC; 60 A at 230 VAC. Setup / rise time 400 / 90 ms at 230 VAC; 800 / 90 ms at 115 VAC, at full load. Hold-up time, typical 50 ms at 230 VAC; 10 ms at 115 VAC, at full load. Setup time is measured at the first cold start. Turning the input power on and off may increase setup time. Protection Short-circuit / overload The overload threshold is 95–108% of rated output power. Constant-current limiting recovers automatically after the fault condition is removed; the application diagram also identifies the low-voltage hiccup region. Overvoltage 28.98–37.26 V; output shutdown, re-power to recover. Protection thresholds do not authorize continuous operation above the rated power. Cooling, Derating and Environment Cooling and operating range Free-air convection; −30 to +70°C, subject to the vertical-installation curve. The shaded −30 to −20°C portion is specified for 230 VAC input only. Vertical thermal curve 100% load through 55°C, falling to 60% at 70°C. Follow the plotted line between these points and the low-temperature input restriction. Input-voltage curve At 60 Hz: 90% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 264 VAC. Working humidity 20–90% RH, non-condensing. Storage −40 to +85°C; 10–95% RH. Temperature coefficient ±0.03%/°C over 0–55°C. Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. High-altitude temperature derating For this fanless design, reduce the permitted ambient temperature by 3.5°C per 1,000 m above 2,000 m (6,500 ft). Apply input-voltage and ambient-temperature restrictions together. The upper operating temperature is not an unconditional full-power rating. Dimensions, Terminals and Installation Dimensions, W × H × D 40 × 90 × 100 mm; drawing tolerance ±1 mm; case 962A. Upper terminals, left to right as drawn +V, +V, −V, −V, DIM−, DIM+. Adjacent terminal pitch is 5 mm. Lower terminals, left to right as drawn FG, N, L. Adjacent terminal pitch is 7.5 mm. Front controls and indication +V ADJ potentiometer and DC OK power-on LED. The indicator is not a separate relay-contact output. DIN rail Fits TS35/7.5 or TS35/15. The rail shown is for reference and is not included with the unit. Recommended clearance at continuous full power 40 mm above, 20 mm below and 5 mm on each side; 15 mm is recommended when the adjacent device is a heat source. Install vertically and follow the supplied unit’s installation instructions. The catalogue does not give a separate complete order code for a model-specific mounting accessory or external adjustment device. Do not treat the illustrated external switching components as included accessories. Safety, EMC and Test Conditions Safety standards UL62368-1, TUV BS EN/EN62368-1 and EAC TP TC004 are listed as approved; the catalogue states Pass LPS. Withstand voltage Input to output: 3 kVAC; input to FG: 2 kVAC; output to FG: 0.5 kVAC. Insulation resistance 100 MΩ for input/output, input/FG and output/FG at 500 VDC, 25°C and 70% RH. EMC emissions BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020. EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035; BS EN/EN61204-3, light-industry level, criteria A; EAC TP TC020. Default measurement conditions Unless stated otherwise: 230 VAC input, rated load and 25°C ambient. This power supply is a component for incorporation into final equipment. Reconfirm EMC compliance of the completed equipment. Weight and Reliability Single-unit catalogue weight 300 g (0.3 kg), from the PACKING entry. This is the single-unit catalogue reference, not the carton gross weight or a shipping-weight promise. Packing reference 42 pieces / 13.6 kg / 0.82 CUFT. MTBF, minimum catalogue estimates 2940.7 thousand hours, Telcordia SR-332 (Bellcore); 439.3 thousand hours, MIL-HDBK-217F at 25°C. Factory test / warranty 100% full-load burn-in test; the catalogue lists a 3-year manufacturer warranty, subject to the applicable terms. MTBF values are statistical estimates under the named methods, not guaranteed service life.

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MEAN WELL DRA-40-12 is a single-output DIN rail power supply rated 12 V DC, 3.34 A and 40.08 W. It combines an internal output-voltage adjustment with external three-in-one constant-current control, in a 40 mm-wide convection-cooled enclosure. Product Datasheet Download MEAN WELL DRA-40 Datasheet (PDF) The DRA-40 section is on PDF pages 1, 2, 3, 4, 5. Refer to the complete mechanical drawings and notes when planning installation. Model Identification Complete model DRA-40-12 Product type Single-output AC/DC DIN rail power supply with external output-current adjustment. Model code DRA-40 identifies the family; 12 identifies the nominal DC output voltage. Use the actual model-specific current and power ratings below. Applications Machine-vision inspection and plant-cultivation systems, subject to load and installation compatibility. DC Output Rated output 12 V DC; 3.34 A rated current; 40.08 W rated power. Current range 0–3.34 A is the specified output-current range. It does not mean the external adjustment signal can reduce the output to 0 A. Constant-current region 3–12 V as tabulated; the highest achievable output voltage in constant-current operation depends on the end-system configuration. Output-voltage adjustment 12–15 V using the internal potentiometer marked +V ADJ. Observe both current and power limits. Ripple and noise, maximum 120 mVp-p. Voltage tolerance / line / load regulation ±1.0% / ±0.5% / ±0.5%. Voltage tolerance includes setup tolerance, line regulation and load regulation. Efficiency, typical 85% under the stated catalogue test conditions. The application diagram distinguishes constant-voltage operation, constant-current operation and the hiccup-protection region below 3 V. Confirm compatibility with the intended load. Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Three-in-One Output-Current Adjustment Connection Apply the external control between DIM+ and DIM−. Do not connect DIM− to the DC output −V. DC control voltage, typical 1–10 VDC: each 1 V increment corresponds to a 10% rated-current increment, from 10% at 1 V through 100% at 10 V. PWM control, typical 10 V PWM, 100 Hz–3 kHz. Duty cycles from 10% through 100% correspond to 10% through 100% of rated current. Resistance control, typical For one supply, 10–100 kΩ in 10 kΩ steps corresponds to 10–100% of rated current in 10% steps. Simultaneous control of N supplies The reference resistance is divided by N: 10 kΩ/N through 100 kΩ/N for the same 10–100% current settings. This is a control-input arrangement, not an output-paralleling rating. Open control input, typical The adjustment tables show 102–108% of rated current with the control input open. This is not an additional continuous-power rating; the rated power and applicable derating limits still apply. Current adjustment alone cannot reduce the output to 0 A. For zero output current, follow the catalogue’s external switch-and-relay application diagram, which interrupts the AC line feeding the supply. The external adjuster, switch and relay are application components; their order codes, contact ratings and inclusion with the power supply are not specified here. Input and Starting AC input 90–264 VAC, universal full-range input; 47–63 Hz. Apply input-voltage derating at low line. DC input 127–370 VDC, connected with positive to AC/L and negative to AC/N; maintain the FG protective-earth connection. AC current, typical 0.8 A at 115 VAC; 0.6 A at 230 VAC. Cold-start inrush current, typical 30 A at 115 VAC; 60 A at 230 VAC. Setup / rise time 400 / 90 ms at 230 VAC; 800 / 90 ms at 115 VAC, at full load. Hold-up time, typical 50 ms at 230 VAC; 10 ms at 115 VAC, at full load. Setup time is measured at the first cold start. Turning the input power on and off may increase setup time. Protection Short-circuit / overload The overload threshold is 95–108% of rated output power. Constant-current limiting recovers automatically after the fault condition is removed; the application diagram also identifies the low-voltage hiccup region. Overvoltage 14.49–18.63 V; output shutdown, re-power to recover. Protection thresholds do not authorize continuous operation above the rated power. Cooling, Derating and Environment Cooling and operating range Free-air convection; −30 to +70°C, subject to the vertical-installation curve. The shaded −30 to −20°C portion is specified for 230 VAC input only. Vertical thermal curve 100% load through 55°C, falling to 60% at 70°C. Follow the plotted line between these points and the low-temperature input restriction. Input-voltage curve At 60 Hz: 90% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 264 VAC. Working humidity 20–90% RH, non-condensing. Storage −40 to +85°C; 10–95% RH. Temperature coefficient ±0.03%/°C over 0–55°C. Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. High-altitude temperature derating For this fanless design, reduce the permitted ambient temperature by 3.5°C per 1,000 m above 2,000 m (6,500 ft). Apply input-voltage and ambient-temperature restrictions together. The upper operating temperature is not an unconditional full-power rating. Dimensions, Terminals and Installation Dimensions, W × H × D 40 × 90 × 100 mm; drawing tolerance ±1 mm; case 962A. Upper terminals, left to right as drawn +V, +V, −V, −V, DIM−, DIM+. Adjacent terminal pitch is 5 mm. Lower terminals, left to right as drawn FG, N, L. Adjacent terminal pitch is 7.5 mm. Front controls and indication +V ADJ potentiometer and DC OK power-on LED. The indicator is not a separate relay-contact output. DIN rail Fits TS35/7.5 or TS35/15. The rail shown is for reference and is not included with the unit. Recommended clearance at continuous full power 40 mm above, 20 mm below and 5 mm on each side; 15 mm is recommended when the adjacent device is a heat source. Install vertically and follow the supplied unit’s installation instructions. The catalogue does not give a separate complete order code for a model-specific mounting accessory or external adjustment device. Do not treat the illustrated external switching components as included accessories. Safety, EMC and Test Conditions Safety standards UL62368-1, TUV BS EN/EN62368-1 and EAC TP TC004 are listed as approved; the catalogue states Pass LPS. Withstand voltage Input to output: 3 kVAC; input to FG: 2 kVAC; output to FG: 0.5 kVAC. Insulation resistance 100 MΩ for input/output, input/FG and output/FG at 500 VDC, 25°C and 70% RH. EMC emissions BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020. EMC immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035; BS EN/EN61204-3, light-industry level, criteria A; EAC TP TC020. Default measurement conditions Unless stated otherwise: 230 VAC input, rated load and 25°C ambient. This power supply is a component for incorporation into final equipment. Reconfirm EMC compliance of the completed equipment. Weight and Reliability Single-unit catalogue weight 300 g (0.3 kg), from the PACKING entry. This is the single-unit catalogue reference, not the carton gross weight or a shipping-weight promise. Packing reference 42 pieces / 13.6 kg / 0.82 CUFT. MTBF, minimum catalogue estimates 2940.7 thousand hours, Telcordia SR-332 (Bellcore); 439.3 thousand hours, MIL-HDBK-217F at 25°C. Factory test / warranty 100% full-load burn-in test; the catalogue lists a 3-year manufacturer warranty, subject to the applicable terms. MTBF values are statistical estimates under the named methods, not guaranteed service life.

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