knx

KNX-20U-640 — KNX bus power supply MEAN WELL KNX-20U-640 is the 640 mA KNX power-supply ordering option identified for 115 VAC input and available by request. Confirm the exact U-version specification and supplied configuration before system selection. Download MEAN WELL KNX-20 Datasheet (PDF)The combined catalog identifies the U option in the model encoding on page 1. Pages 2–4 provide detailed specifications for KNX-20E-640, the 230 VAC E version. Model selection Parameter Details Manufacturer ordering option KNX-20U-640. The U code denotes 115 VAC input; E denotes the standard 230 VAC version. Rated output current 640 mA, as identified by the current code and the series model encoding. Input selection 115 VAC nominal input option. The catalog does not give a separate U-version operating input range; do not apply the E version’s 180–264 VAC range to this model. Detailed specification Obtain the U-version output voltage and power, permitted AC/DC input range, protection ratings, temperature limits, dimensions and installation instructions for the supplied unit. The E-only detailed specification table does not establish these U-version values. Unit mass No separately identified U-version unit mass is provided in the current catalog.

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KSC-02L — KNX secure line coupler MEAN WELL KSC-02L provides a galvanically isolated, bidirectional connection between a KNX TP main line and subline. It can operate as a line/area coupler or as a repeater, with telegram filtering and diagnostic indicators. Download MEAN WELL KSC Datasheet (PDF)Download MEAN WELL KSC-01L Installation Reference (PDF)KSC series: combined catalog pages 18–20, dated 2025-04-18. Interface and control functions Parameter Details Model function KNX Secure line coupler/repeater with Data Secure; the catalog identifies the 02 variant as available by request. Power supply and current Main line and subline each use 21–30 VDC KNX TP. Current consumption is below 10 mA from the main TP line; each line segment needs its own KNX bus power supply. Interfaces KNX protocol on both the main-line and subline interfaces; galvanic isolation between the two TP sides. Routing and commissioning Use the TP Coupler application for line/area coupling and the TP Repeater application for unfiltered data transfer between galvanically isolated line segments. Telegram filtering Filters traffic according to bus hierarchy and built-in group-address filter tables. Manual function permits temporary filter switch-off and special routing, repetition and confirmation settings for commissioning and troubleshooting. Long telegrams Supports tracing of subline traffic. The 2025-04-18 series catalog specifies up to 240-byte APDU. Repeater topology Up to four line segments can form one KNX TP line using three KSC repeaters. Provide an independent KNX power supply for each segment and follow the coupler hierarchy; do not directly bridge separate lines around their couplers. Bus connections B3 is the main-line KNX TP terminal; B4 is the subline KNX TP terminal. Both use red + / black −. B1 is the Function button and B2 the Program button. Main-line status Green: main line OK; red: manual function active. Subline status Green: subline OK. Traffic indicators The main-line and subline traffic LEDs flash green with telegram traffic and flash red for transmission errors. Address-routing indicators For both group-address (GA) and physical-address (PA) routing: green means filter active; orange route all; red block all; OFF means the main-line and subline settings differ. Programming indicator Red: programming mode. Installation and environmental limits Parameter Details Dimensions 36 × 90 × 71 mm (W × H × D); two modular units wide. DIN-rail mounting 35 mm rail; TS35/7.5 or TS35/15 according to the mechanical drawing. Operating conditions −5°C to +45°C; 20–90% RH, non-condensing. Storage conditions −20°C to +60°C; 5–93% RH, non-condensing. Protection and pollution IP20 according to IEC 60529; pollution degree 2 according to IEC 60664-1. Unit mass 76 g, catalog packing reference per unit; not a separately specified net mass. Commissioning data Use the manufacturer’s appropriate ETS application database and instructions for the exact model and application. Standards and reliability Parameter Details Safety standards EAC TP TC 004 approved; compliance to EN 60669. KNX standards ISO/IEC 14543-3, EN 50090 and EN 13321-1. EMC emissions Compliance to EN 50491-5 and EN 61000-6; EAC TP TC 020. EMC immunity Compliance to EN 61000-4-2, -3, -4, -5, -6 and -11; EAC TP TC 020. MTBF reference 100,000 hours minimum; a reliability reference, not guaranteed service life. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Related manual scope The linked KSC-01L manual is a reference for the related physical connections and general KNX installation. It does not document this model’s Secure commissioning, application parameters or factory defaults. Obtain the correct application database and instructions for the supplied KSC-02L before commissioning.

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KSC-01L — KNX line coupler MEAN WELL KSC-01L provides a galvanically isolated, bidirectional connection between a KNX TP main line and subline. It can operate as a line/area coupler or as a repeater, with telegram filtering and diagnostic indicators. Download MEAN WELL KSC Datasheet (PDF)Download MEAN WELL KSC-01L User Manual (PDF)KSC series: combined catalog pages 18–20, dated 2025-04-18. Interface and control functions Parameter Details Model function Classic KNX TP line coupler/repeater. Power supply and current Main line and subline each use 21–30 VDC KNX TP. Current consumption is below 10 mA from the main TP line; each line segment needs its own KNX bus power supply. Interfaces KNX protocol on both the main-line and subline interfaces; galvanic isolation between the two TP sides. Routing and commissioning Use the TP Coupler application for line/area coupling and the TP Repeater application for unfiltered data transfer between galvanically isolated line segments. Telegram filtering Filters traffic according to bus hierarchy and built-in group-address filter tables. Manual function permits temporary filter switch-off and special routing, repetition and confirmation settings for commissioning and troubleshooting. Long telegrams Supports tracing of subline traffic. The 2025-04-18 series catalog specifies up to 240-byte APDU. The March 2024 KSC-01L manual instead states 239 bytes; confirm the supported telegram length for the supplied hardware/firmware when designing near this limit. Repeater topology Up to four line segments can form one KNX TP line using three KSC repeaters. Provide an independent KNX power supply for each segment and follow the coupler hierarchy; do not directly bridge separate lines around their couplers. Bus connections B3 is the main-line KNX TP terminal; B4 is the subline KNX TP terminal. Both use red + / black −. B1 is the Function button and B2 the Program button. Main-line status Green: main line OK; red: manual function active. Subline status Green: subline OK. Traffic indicators The main-line and subline traffic LEDs flash green with telegram traffic and flash red for transmission errors. Address-routing indicators For both group-address (GA) and physical-address (PA) routing: green means filter active; orange route all; red block all; OFF means the main-line and subline settings differ. Programming indicator Red: programming mode. Installation and environmental limits Parameter Details Dimensions 36 × 90 × 71 mm (W × H × D); two modular units wide. DIN-rail mounting 35 mm rail; TS35/7.5 or TS35/15 according to the mechanical drawing. Operating conditions −5°C to +45°C; 20–90% RH, non-condensing. Storage conditions −20°C to +60°C; 5–93% RH, non-condensing. Protection and pollution IP20 according to IEC 60529; pollution degree 2 according to IEC 60664-1. Unit mass 66 g per the KSC-01L manual Weight entry; the series catalog separately lists a 76 g one-piece packing reference. Commissioning data Use the manufacturer’s appropriate ETS application database and instructions for the exact model and application. Standards and reliability Parameter Details Safety standards EAC TP TC 004 approved; compliance to EN 60669. KNX standards ISO/IEC 14543-3, EN 50090 and EN 13321-1. EMC emissions Compliance to EN 50491-5 and EN 61000-6; EAC TP TC 020. EMC immunity Compliance to EN 61000-4-2, -3, -4, -5, -6 and -11; EAC TP TC 020. MTBF reference 100,000 hours minimum; a reliability reference, not guaranteed service life. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Bus connection and mounting Use the marked red/black screwless KNX TP connector with 0.6–0.8 mm-diameter single-core wire and mount the device on a 35 mm TH35 rail. Do not connect the device to 230 V. Commissioning address Assign a physical address that matches the project topology: X.Y.0 for a line coupler or X.0.0 for an area coupler. Load and check the applicable ETS configuration and filter settings before putting the installation into service. Coupler and repeater operation Select the TP Coupler or TP Repeater application to match the installation. A repeater forwards telegrams without a filter table; each line segment requires its own KNX power supply. In coupler operation, the manual’s factory filter settings block telegrams until the filter table is configured. Do not use repeaters in a backbone or main line. Document revision and frame length The current series catalog states an APDU length of up to 240 bytes, while the March 2024 KSC-01L manual states 239 bytes. Confirm the required frame length against the supplied hardware and application version. Documented unit weight The March 2024 KSC-01L manual gives a unit weight of 66 g. The main catalog’s 76 g PACKING value is a separate packaging reference.

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KSR-02IP — KNX IP Secure router MEAN WELL KSR-02IP connects Ethernet/KNX IP and KNX TP for routing, tunneling, commissioning and diagnostics. It is powered by the KNX TP bus and includes a web front end for maintenance. Download MEAN WELL KSR Datasheet (PDF)Download MEAN WELL KSR-01IP Installation Reference (PDF)KSR series: combined catalog pages 15–17. Product-sheet date: 2019-07-24. Interface and control functions Parameter Details Model function KNX IP Secure router; the catalog identifies the 02 variant as available by request. Power supply and current 21–30 VDC from the KNX TP bus; consumption below 20 mA. No additional external power supply is required. Interfaces RJ45 Ethernet connector and KNX TP connector; KNX protocol. Routing and commissioning KNXnet/IP routing plus four KNX IP/TP tunneling connections. Supports commissioning, addressing, parameter settings, visualization and diagnostics; Universal Plug and Play. Telegram filtering Filters traffic according to bus hierarchy and built-in group-address filter tables. Configuration from the subline can be blocked. Temporary filter bypass is available from the function button; ETS sets the time to return to normal operation. Web front end Built-in web front-end page; firmware can be updated through it. Bus connection Connect Ethernet at B1 and the KNX TP bus at B4, red + / black −. B2 is the Function button and B3 the Program button. Main-line status Green: main line OK; red: manual function active. Subline status Green: subline OK. Traffic indicators The main-line and subline traffic LEDs flash green with telegram traffic and flash red for transmission errors. Address-routing indicators For both group-address (GA) and physical-address (PA) routing: green means filter active; orange route all; red block all; OFF means the main-line and subline settings differ. Programming indicator Red: programming mode. Flashing red: no IP connection. Installation and environmental limits Parameter Details Dimensions 36 × 90 × 71 mm (W × H × D); two modular units wide. DIN-rail mounting 35 mm rail; TS35/7.5 or TS35/15 according to the mechanical drawing. Operating conditions −5°C to +45°C; 20–90% RH, non-condensing. Storage conditions −20°C to +60°C; 5–93% RH, non-condensing. Protection and pollution IP20 according to IEC 60529; pollution degree 2 according to IEC 60664-1. Unit mass 80 g, catalog packing reference per unit; not a separately specified net mass. Commissioning data Use the manufacturer’s appropriate ETS application database and instructions for the exact model and application. Standards and reliability Parameter Details Safety standards EAC TP TC 004 approved; compliance to EN 50428 and EN 62479; EN 60950-1. KNX standards ISO/IEC 14543-3, EN 50090 and EN 13321-1. EMC emissions Compliance to EN 50491-5 and EN 61000-3-3; EAC TP TC 020. EMC immunity Compliance to EN 61000-4-2, -3, -4, -5, -6 and -11; EAC TP TC 020. MTBF reference 100,000 hours minimum; a reliability reference, not guaranteed service life. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Related manual scope The linked KSR-01IP manual is a reference for the related physical connections and general KNX installation. It does not document this model’s Secure commissioning, application parameters or factory defaults. Obtain the correct application database and instructions for the supplied KSR-02IP before commissioning.

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KSR-01IP — KNX IP router MEAN WELL KSR-01IP connects Ethernet/KNX IP and KNX TP for routing, tunneling, commissioning and diagnostics. It is powered by the KNX TP bus and includes a web front end for maintenance. Download MEAN WELL KSR Datasheet (PDF)Download MEAN WELL KSR-01IP User Manual (PDF)KSR series: combined catalog pages 15–17. Product-sheet date: 2019-07-24. Interface and control functions Parameter Details Model function Classic KNX IP router. Power supply and current 21–30 VDC from the KNX TP bus; consumption below 20 mA. No additional external power supply is required. Interfaces RJ45 Ethernet connector and KNX TP connector; KNX protocol. Routing and commissioning KNXnet/IP routing plus four KNX IP/TP tunneling connections. Supports commissioning, addressing, parameter settings, visualization and diagnostics; Universal Plug and Play. Telegram filtering Filters traffic according to bus hierarchy and built-in group-address filter tables. Configuration from the subline can be blocked. Temporary filter bypass is available from the function button; ETS sets the time to return to normal operation. Web front end Built-in web front-end page; firmware can be updated through it. Bus connection Connect Ethernet at B1 and the KNX TP bus at B4, red + / black −. B2 is the Function button and B3 the Program button. Main-line status Green: main line OK; red: manual function active. Subline status Green: subline OK. Traffic indicators The main-line and subline traffic LEDs flash green with telegram traffic and flash red for transmission errors. Address-routing indicators For both group-address (GA) and physical-address (PA) routing: green means filter active; orange route all; red block all; OFF means the main-line and subline settings differ. Programming indicator Red: programming mode. Flashing red: no IP connection. Installation and environmental limits Parameter Details Dimensions 36 × 90 × 71 mm (W × H × D); two modular units wide. DIN-rail mounting 35 mm rail; TS35/7.5 or TS35/15 according to the mechanical drawing. Operating conditions −5°C to +45°C; 20–90% RH, non-condensing. Storage conditions −20°C to +60°C; 5–93% RH, non-condensing. Protection and pollution IP20 according to IEC 60529; pollution degree 2 according to IEC 60664-1. Unit mass 70 g per the KSR-01IP manual Weight entry; the series catalog separately lists an 80 g one-piece packing reference. Commissioning data Use the manufacturer’s appropriate ETS application database and instructions for the exact model and application. Standards and reliability Parameter Details Safety standards EAC TP TC 004 approved; compliance to EN 50428 and EN 62479; EN 60950-1. KNX standards ISO/IEC 14543-3, EN 50090 and EN 13321-1. EMC emissions Compliance to EN 50491-5 and EN 61000-3-3; EAC TP TC 020. EMC immunity Compliance to EN 61000-4-2, -3, -4, -5, -6 and -11; EAC TP TC 020. MTBF reference 100,000 hours minimum; a reliability reference, not guaranteed service life. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Bus connection and mounting Use the marked red/black screwless KNX TP connector with 0.6–0.8 mm-diameter single-core wire and mount the device on a 35 mm TH35 rail. Do not connect the device to 230 V. Commissioning address Assign a physical address that matches the project topology: X.Y.0 for a line coupler or X.0.0 for an area coupler. Load and check the applicable ETS configuration and filter settings before putting the installation into service. Ethernet and KNX network Use the RJ45 connection for a compatible 10/100 BaseT Ethernet network and the separate KNX TP bus connector. KNX IP devices that communicate with one another must use the same multicast address; tunnelling addresses must belong to the subline address range. Documented unit weight The March 2024 KSR-01IP manual gives a unit weight of 70 g. The main catalog’s 80 g PACKING value is a separate packaging reference.

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KSI-01U — KNX USB interface MEAN WELL KSI-01U provides galvanically isolated, bidirectional access between a computer’s USB port and a KNX TP bus. It supports commissioning, addressing, parameter setting, diagnostics and system visualization without an additional external power supply. Download MEAN WELL KSI-01U Datasheet (PDF)Download MEAN WELL KSI-01U User Manual (PDF)KSI-01U: combined catalog pages 12–14. Product-sheet date: 2019-07-24. Interface and control functions Parameter Details Interfaces and power USB Type B: 5 VDC, below 20 mA from the USB bus. KNX TP: 21–30 VDC, below 5 mA from the KNX bus. Both connections provide their respective supply; no separate auxiliary supply is required. Programming protocol KNX protocol; flexible cEMI host communication. Message length Long messages up to 220-byte APDU. Software connection The catalog describes ETS, EITT including Raw Frame mode, and other software using the FALCON driver. On systems not supported by FALCON, such as Linux, use suitable software implementing the cEMI interface; this is not a guarantee that ETS runs on every operating system. Cable connection Connect a computer’s USB Type A port to the interface’s USB Type B port, and the KNX TP bus to the red/black terminal with red + and black −. The USB cable is not included in the industrial package. USB indicator Green ON: USB connection OK; flashing green: telegram traffic; red: USB suspend mode; OFF: no USB connection. KNX indicator Green ON: KNX connection OK; flashing green: telegram traffic; OFF: no KNX bus connection or no USB connection. Installation and environmental limits Parameter Details Dimensions 36 × 90 × 71 mm (W × H × D); two modular units wide. DIN-rail mounting 35 mm rail; TS35/7.5 or TS35/15 according to the mechanical drawing. Operating conditions −5°C to +45°C; 20–90% RH, non-condensing. Storage conditions −20°C to +60°C; 5–93% RH, non-condensing. Protection and pollution IP20 according to IEC 60529; pollution degree 2 according to IEC 60664-1. Unit mass 62 g per the May 2024 KSI-01U manual Weight entry. The 2019 catalog separately lists 70 g as its one-piece packing reference. Commissioning data Use the manufacturer’s appropriate ETS application database and instructions for the exact model and application. Standards and reliability Parameter Details Safety standards EAC TP TC 004 approved; compliance to EN 50428 and EN 62479. KNX standards ISO/IEC 14543-3, EN 50090 and EN 13321-1. EMC emissions Compliance to EN 50491-5 and EN 61000-3-3; EAC TP TC 020. EMC immunity Compliance to EN 61000-4-2, -3, -4, -5, -6 and -11; EAC TP TC 020. MTBF reference 100,000 hours minimum; a reliability reference, not guaranteed service life. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Installation and supply Use qualified personnel, a dry location and a 35 mm DIN rail. Connect the KNX bus and USB as shown; the interface is not powered without USB. Do not connect the device to 230 V or add a mains supply. Keep the housing closed and protect the insulation. Connections and cable The USB interface is USB 2.0 Type B female, connected to the host’s Type A port. Use a USB cable no longer than 5 m; the industrial package does not include the cable. The screwless KNX terminal accepts 0.6–0.8 mm-diameter single-core wire. Commissioning The default physical address is 0.2.255. Select KSI-01U as the interface in ETS and assign an address appropriate to the project. Its database entry is available for ETS4 and later and has no device parameters or communication objects of its own. USB software interface The USB HID profile uses a standard host driver, including Windows and Linux. KNX commissioning or visualization still requires suitable software; cEMI and Raw Frame support do not imply that every commissioning application runs on every operating system. Connection indicators The USB LED is green when connected, blinks green with telegram traffic, is red in USB suspend mode and is off without USB. The KNX LED is green when connected, blinks with telegram traffic and is off if KNX or USB is disconnected. KNX Secure visualization For visualization of KNX Secure devices, configure secured Group Associations and the appropriate interface access in the ETS project. Documented unit weight The May 2024 instruction manual lists a unit weight of 62 g. The older catalog’s 70 g value is labeled PACKING and is kept separate from this explicit weight specification.

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KNX-40E-1280D — KNX power supply with diagnostics MEAN WELL KNX-40E-1280D supplies a 30 V KNX bus through an integrated choke and provides a separate unchoked ancillary output. The two outputs share a total 1280 mA / 38.4 W rating. The D version adds KNX diagnostics, measurements and logic functions. Download MEAN WELL KNX-40E Datasheet (PDF)Download MEAN WELL KNX-40E-1280D User Manual (PDF)KNX-40E series, combined catalog pages 5–11, dated 2025-04-18. Output and input ratings Parameter Details Bus and auxiliary outputs 30 VDC KNX bus output through an integrated choke, plus a 30 VDC ancillary output without a choke. Use the ancillary output for a KNX device’s separate auxiliary-power input, not as a substitute for the choked bus connection. Combined output limit 1280 mA total; 38.4 W rated output. Bus current I1 plus ancillary current I2 must not exceed 1280 mA. Ripple and noise 100 mVp-p maximum, measured before the choke with 20 MHz bandwidth and a 12-inch twisted-pair wire terminated with parallel 0.1 µF and 47 µF capacitors. Short-circuit current 2.8 A. Setup and rise time 1000 ms setup and 50 ms rise at 230 VAC, full load. Mains-failure backup time 200 ms typical at 230 VAC, full load. Input range 180–264 VAC, 47–63 Hz; 176–280 VDC. Follow the manufacturer’s DC-input polarity instructions for the supplied unit. Efficiency 86% typical, measured before the choke. AC current 0.5 A typical at 230 VAC. Inrush current Cold start at 230 VAC: 60 A typical; pulse width 1200 µs measured at 50% of peak current. Leakage current Below 1 mA at 240 VAC. Protection and operation Parameter Details Overload protection 205–235% of rated output power; constant-current limiting with automatic recovery after the fault is removed. Overvoltage protection 33–35 V; hiccup mode with automatic recovery after the fault is removed. Cooling and classification Free-air convection; Class I construction with protective-earth connection. SELV output; IP20 design. Version D version with diagnostic and logic functions. Reset operation Press RESET once: the bus reset then lasts 20 seconds automatically. Bus-voltage indicator Constant green: 28–31 VDC. Constant red: below 28 VDC. Constant orange: above 31 VDC. Output-current indicator Constant green: below 1280 mA; constant orange: 1280–1600 mA; constant red: above 1600 mA (overload indication). These display thresholds do not extend the rated 1280 mA output. Reset indicator Constant red during a KNX bus restart. Input-supply indicator Constant green: AC input. Flashing green: DC input. Constant red: AC/DC input failure. Temperature indicator Constant green: internal temperature 0–75°C; constant red: outside this range. This is an internal-temperature indication, not the permitted ambient-temperature range. Traffic indicator Flashing green: telegram load below 80%; constant red: telegram load at least 80%. Programming indicator Constant red in programming mode. Load the KNX-40E-1280D application database for the indicators to operate properly. Diagnostic measurements Via KNX: output voltage and current, device temperature, bus-traffic load and threshold alarms; capture maximum current and temperature over a tracking period. Counters and logic Heartbeat and power-on information; total working time, time since startup, bus-reset and device-start counters; overload and short-circuit statistics; calculation reset and requests; four alarm/count/duration groups. Configure communication-object flags and data-point formats in ETS. Commissioning Use the manufacturer’s application database from the ETS online catalog or product catalog. The front Prog. button is marked for a press longer than 1 second. Environment and installation Parameter Details Ambient temperature and derating −30°C to +70°C. In vertical mounting, 100% load through +45°C, then reduce linearly to 60% at +70°C. The curve stops at +70°C. Input/load curve At 60 Hz, the static characteristic shows 100% load over 180–264 VAC. Humidity Operation: 20–95% RH, non-condensing. Storage: −40°C to +85°C, 10–95% RH, non-condensing. Altitude and category Overvoltage category III, altitude up to 2000 m. For operation above 2000 m, the catalog requires reducing allowable ambient temperature by 3.5°C per additional 1000 m for this fanless model. Vibration 10–500 Hz, 2G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. Dimensions 72 × 90 × 57 mm (W × H × D), 4 modular units wide. Use the complete mechanical drawing for rail and terminal clearances. The 57 mm depth is from the specification table; the mechanical drawing shows 54.5 mm body depth and 58.5 mm overall depth. Confirm the supplied dimensions and allow clearance. Mounting 35 mm DIN rail according to DIN BS EN/EN 60715; TS35/7.5 or TS35/15. Terminal identification Connect the marked L, N and protective-earth input terminals. KNX bus terminal: red positive, dark gray negative. Auxiliary terminals are separately marked +V and −V. Wire and tool Catalog screw-terminal guidance: 0.5–4.0 mm² solid-core or 0.5–2.5 mm² finely stranded conductors; slotted screwdriver 2.5 × 0.4 to 3.5 × 0.6 mm. Catalog torque: 0.8 N·m; follow the installation instructions applicable to the supplied terminal revision. Bus topology Up to 256 devices in TP1-256 topology, subject to the available total current. Maximum power-supply-to-furthest-device distance: 350 m; maximum between two devices: 700 m; all line segments combined: 1000 m. Unit mass 328 g per unit; 48 pieces / 16.4 kg / 1.02 CUFT packing reference. Standards and reliability Parameter Details Safety standards BS EN/EN 61558-1, BS EN/EN 61558-2-16 and BS EN/EN 50491-3. Withstand voltage Input–output: 4.2 kVAC; input–FG: 2 kVAC. Insulation resistance Input–output and input–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. EMC emissions Compliance to BS EN/EN 50491-5-2/-5-3 and BS EN/EN 61000-3-2/-3-3. EMC immunity Compliance to BS EN/EN 50491-5-2/-5-3 and BS EN/EN 61000-4-2, -3, -4, -5, -6, -8 and -11; heavy-industry level. MTBF reference 1,414,200 hours minimum per Telcordia SR-332; 217,100 hours minimum per MIL-HDBK-217F at 25°C. These are reliability references, not a guaranteed operating life. Test and integration conditions Unless stated otherwise, parameters are measured at 230 VAC, rated load and 25°C ambient. The supply is a component; verify EMC compliance again in the completed equipment. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Supply and bus wiring Connect the AC input to L, N and protective earth. Keep the ancillary 30 V output separate from the choked KNX bus output and observe the marked polarity. Terminal preparation For AC and ancillary terminals, the instruction manual specifies 12–26 AWG conductors, 6.5 mm stripping, a 3 mm slotted screwdriver and 8 kgf·cm (7 lb·in) tightening torque. The screwless KNX bus terminal uses 0.6–0.8 mm-diameter solid wire (20–22 AWG), stripped 5 mm. Bus installation limits The manual lists up to 256 bus devices, subject to the available supply current. Limit the cable distance from the supply to the furthest device to 350 m, the distance between two bus devices to 700 m and the total bus cable length to 1000 m. Diagnostic commissioning Load the correct KNX-40E-1280D application database, physical address and parameters using ETS. The diagnostic LED indicators require the application database to work correctly. Temperature indication The 0–75°C green indication in the user manual is the internal-temperature monitoring range, not the allowable ambient operating range. Apply the catalog ambient limits and derating curve.

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KNX-40E-1280 — KNX bus power supply MEAN WELL KNX-40E-1280 supplies a 30 V KNX bus through an integrated choke and provides a separate unchoked ancillary output. The two outputs share a total 1280 mA / 38.4 W rating. It mounts on a 35 mm DIN rail for building-automation systems. Download MEAN WELL KNX-40E Datasheet (PDF)Download MEAN WELL KNX-40E-1280D Installation Reference (PDF)KNX-40E series, combined catalog pages 5–11, dated 2025-04-18. Output and input ratings Parameter Details Bus and auxiliary outputs 30 VDC KNX bus output through an integrated choke, plus a 30 VDC ancillary output without a choke. Use the ancillary output for a KNX device’s separate auxiliary-power input, not as a substitute for the choked bus connection. Combined output limit 1280 mA total; 38.4 W rated output. Bus current I1 plus ancillary current I2 must not exceed 1280 mA. Ripple and noise 100 mVp-p maximum, measured before the choke with 20 MHz bandwidth and a 12-inch twisted-pair wire terminated with parallel 0.1 µF and 47 µF capacitors. Short-circuit current 2.8 A. Setup and rise time 1000 ms setup and 50 ms rise at 230 VAC, full load. Mains-failure backup time 200 ms typical at 230 VAC, full load. Input range 180–264 VAC, 47–63 Hz; 176–280 VDC. Follow the manufacturer’s DC-input polarity instructions for the supplied unit. Efficiency 86% typical, measured before the choke. AC current 0.5 A typical at 230 VAC. Inrush current Cold start at 230 VAC: 60 A typical; pulse width 1200 µs measured at 50% of peak current. Leakage current Below 1 mA at 240 VAC. Protection and operation Parameter Details Overload protection 205–235% of rated output power; constant-current limiting with automatic recovery after the fault is removed. Overvoltage protection 33–35 V; hiccup mode with automatic recovery after the fault is removed. Cooling and classification Free-air convection; Class I construction with protective-earth connection. SELV output; IP20 design. Version Basic version without the D-version diagnostic communication functions. Reset operation Press and hold RESET for at least 20 seconds to reset the KNX bus. Bus-voltage indicator Constant green: 28–31 VDC. Constant red: below 28 VDC. Constant orange: above 31 VDC. Output-current indicator Constant green: below 1280 mA; constant orange: 1280–1600 mA; constant red: above 1600 mA (overload indication). These display thresholds do not extend the rated 1280 mA output. Reset indicator Constant red during a KNX bus restart. Environment and installation Parameter Details Ambient temperature and derating −30°C to +70°C. In vertical mounting, 100% load through +45°C, then reduce linearly to 60% at +70°C. The curve stops at +70°C. Input/load curve At 60 Hz, the static characteristic shows 100% load over 180–264 VAC. Humidity Operation: 20–95% RH, non-condensing. Storage: −40°C to +85°C, 10–95% RH, non-condensing. Altitude and category Overvoltage category III, altitude up to 2000 m. For operation above 2000 m, the catalog requires reducing allowable ambient temperature by 3.5°C per additional 1000 m for this fanless model. Vibration 10–500 Hz, 2G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. Dimensions 72 × 90 × 57 mm (W × H × D), 4 modular units wide. Use the complete mechanical drawing for rail and terminal clearances. The 57 mm depth is from the specification table; the mechanical drawing shows 54.5 mm body depth and 58.5 mm overall depth. Confirm the supplied dimensions and allow clearance. Mounting 35 mm DIN rail according to DIN BS EN/EN 60715; TS35/7.5 or TS35/15. Terminal identification Connect the marked L, N and protective-earth input terminals. KNX bus terminal: red positive, dark gray negative. Auxiliary terminals are separately marked +V and −V. Wire and tool Catalog screw-terminal guidance: 0.5–4.0 mm² solid-core or 0.5–2.5 mm² finely stranded conductors; slotted screwdriver 2.5 × 0.4 to 3.5 × 0.6 mm. Catalog torque: 0.8 N·m; follow the installation instructions applicable to the supplied terminal revision. Bus topology Up to 256 devices in TP1-256 topology, subject to the available total current. Maximum power-supply-to-furthest-device distance: 350 m; maximum between two devices: 700 m; all line segments combined: 1000 m. Unit mass 328 g per unit; 48 pieces / 16.4 kg / 1.02 CUFT packing reference. Standards and reliability Parameter Details Safety standards BS EN/EN 61558-1, BS EN/EN 61558-2-16 and BS EN/EN 50491-3. Withstand voltage Input–output: 4.2 kVAC; input–FG: 2 kVAC. Insulation resistance Input–output and input–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. EMC emissions Compliance to BS EN/EN 50491-5-2/-5-3 and BS EN/EN 61000-3-2/-3-3. EMC immunity Compliance to BS EN/EN 50491-5-2/-5-3 and BS EN/EN 61000-4-2, -3, -4, -5, -6, -8 and -11; heavy-industry level. MTBF reference 1,414,200 hours minimum per Telcordia SR-332; 217,100 hours minimum per MIL-HDBK-217F at 25°C. These are reliability references, not a guaranteed operating life. Test and integration conditions Unless stated otherwise, parameters are measured at 230 VAC, rated load and 25°C ambient. The supply is a component; verify EMC compliance again in the completed equipment. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Supply and bus wiring Connect the AC input to L, N and protective earth. Keep the ancillary 30 V output separate from the choked KNX bus output and observe the marked polarity. Terminal preparation For AC and ancillary terminals, the instruction manual specifies 12–26 AWG conductors, 6.5 mm stripping, a 3 mm slotted screwdriver and 8 kgf·cm (7 lb·in) tightening torque. The screwless KNX bus terminal uses 0.6–0.8 mm-diameter solid wire (20–22 AWG), stripped 5 mm. Bus installation limits The manual lists up to 256 bus devices, subject to the available supply current. Limit the cable distance from the supply to the furthest device to 350 m, the distance between two bus devices to 700 m and the total bus cable length to 1000 m. Linked manual scope The manufacturer links the KNX-40E-1280D manual as an installation reference for the KNX-40E family. Its diagnostic monitoring, programming and application parameters describe the D version and are not features of this ordinary version.

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KNX-20E-640 — KNX bus power supply MEAN WELL KNX-20E-640 supplies a 30 V KNX bus through an integrated choke and provides a separate unchoked ancillary output. The two outputs share a total 640 mA / 19.2 W rating. It mounts on a 35 mm DIN rail for building-automation systems. Download MEAN WELL KNX-20E-640 Datasheet (PDF)Download MEAN WELL KNX-20E Installation Manual (PDF)KNX-20E-640, combined catalog pages 1–4, dated 2025-10-10. Output and input ratings Parameter Details Bus and auxiliary outputs 30 VDC KNX bus output through an integrated choke, plus a 30 VDC ancillary output without a choke. Use the ancillary output for a KNX device’s separate auxiliary-power input, not as a substitute for the choked bus connection. Combined output limit 640 mA total; 19.2 W rated output. Bus current I1 plus ancillary current I2 must not exceed 640 mA. Ripple and noise 100 mVp-p maximum, measured before the choke with 20 MHz bandwidth and a 12-inch twisted-pair wire terminated with parallel 0.1 µF and 47 µF capacitors. Short-circuit current 1.4 A. Setup and rise time 1000 ms setup and 50 ms rise at 230 VAC, full load. Mains-failure backup time 200 ms typical at 230 VAC, full load. Input range 180–264 VAC, 47–63 Hz; 230–370 VDC. Follow the manufacturer’s DC-input polarity instructions for the supplied unit. Efficiency 86% typical, measured before the choke. AC current 0.22 A typical at 230 VAC. Inrush current Cold start at 230 VAC: 40 A typical. Leakage current Below 1 mA at 240 VAC. No-load consumption Below 0.5 W. Protection and operation Parameter Details Overload protection 205–235% of rated output power; constant-current limiting with automatic recovery after the fault is removed. Overvoltage protection 33–35 V; output shutdown; reapply power to recover. Cooling and classification Free-air convection; Class I construction with protective-earth connection. SELV output; IP20 design. Version Standard E version for nominal 230 VAC input. Reset operation Press and hold RESET for at least 20 seconds to reset the KNX bus. Status LEDs Green ON: normal operation. Red RESET: bus reset. Red I > Imax: overload or short circuit. Environment and installation Parameter Details Ambient temperature and derating −30°C to +70°C. In vertical mounting, 100% load through +50°C, then reduce linearly to 60% at +70°C. The curve stops at +70°C. Input/load curve At 60 Hz, the static characteristic shows 100% load over 180–264 VAC. Humidity Operation: 20–95% RH, non-condensing. Storage: −40°C to +85°C, 10–95% RH, non-condensing. Altitude and category Overvoltage category III, altitude up to 2000 m. For operation above 2000 m, the catalog requires reducing allowable ambient temperature by 3.5°C per additional 1000 m for this fanless model. Vibration 10–500 Hz, 2G, 10 minutes per cycle; 60 minutes along each X, Y and Z axis. Dimensions 52.5 × 90 × 54.5 mm (W × H × D), 3 modular units wide. Use the complete mechanical drawing for rail and terminal clearances. Mounting 35 mm DIN rail according to DIN BS EN/EN 60715; TS35/7.5 or TS35/15. Terminal identification Connect the marked L, N and protective-earth input terminals. KNX bus terminal: red positive, black negative. Auxiliary terminals are separately marked +V and −V. Wire and tool Catalog screw-terminal guidance: 0.5–4.0 mm² solid-core or 0.5–2.5 mm² finely stranded conductors; slotted screwdriver 2.5 × 0.4 to 3.5 × 0.6 mm. Catalog torque: 0.8 N·m; follow the installation instructions applicable to the supplied terminal revision. Bus topology Up to 64 bus devices, subject to the available total current. Maximum power-supply-to-furthest-device distance: 350 m; maximum between two devices: 700 m; all line segments combined: 1000 m. Unit mass 215 g per unit; 60 pieces / 13.9 kg / 0.97 CUFT packing reference. Parallel supply option The catalog explicitly permits two KNX-20E-640 supplies in parallel on the same KNX line without a minimum cable distance between them. Standards and reliability Parameter Details Safety standards BS EN/EN 61558-1, BS EN/EN 61558-2-16 and BS EN/EN 50491-3; EAC TP TC 004 approved. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 0.6 kVAC. Insulation resistance Input–output and input–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. EMC emissions Compliance to BS EN/EN 50491-5-2/-5-3 and BS EN/EN 61000-3-2/-3-3; EAC TP TC 020. EMC immunity Compliance to BS EN/EN 50491-5-2/-5-3 and BS EN/EN 61000-4-2, -3, -4, -5, -6, -8 and -11; heavy-industry level; BS EN/EN 55035 and EAC TP TC 020. MTBF reference 1,899,900 hours minimum per Telcordia SR-332; 416,500 hours minimum per MIL-HDBK-217F at 25°C. These are reliability references, not a guaranteed operating life. Test and integration conditions Unless stated otherwise, parameters are measured at 230 VAC, rated load and 25°C ambient. The supply is a component; verify EMC compliance again in the completed equipment. Manufacturer warranty reference The catalog states a 3-year manufacturer warranty, subject to its applicable terms. Manufacturer installation instructions Parameter Details Installation and clearances Have a qualified electrician install the supply indoors with power isolated during wiring. Keep at least 5 mm clear on each side, 40 mm above and 20 mm below for ventilation. Separate supply and bus terminals Mount on TS35/7.5 or TS35/15 DIN rail. Connect mains to L, N and protective earth at the lower terminals; connect the KNX bus to the red BUS+ and black BUS− terminals. Keep the ancillary output separate from the choked bus output. Terminal preparation For AC and ancillary terminals, use 0.5–4.0 mm² solid or 0.5–2.5 mm² stranded wire, strip 6.5 mm and use a 3 mm slotted screwdriver. The manual recommends 8 kgf·cm (7 lb·in), approximately 0.78 N·m; the current catalog specifies 0.8 N·m. KNX conductor preparation The screwless KNX terminal accepts 0.6–0.8 mm-diameter solid wire (20–22 AWG), stripped 5 mm. Diameter and conductor area are different measurements. Temperature and document version The current catalog specifies −30°C to +70°C with its derating curve. The linked installation manual gives −5°C to +50°C and a 50°C installation limit. Confirm the instructions for the supplied hardware before operating outside the manual’s narrower range. Circuit-breaker reference The manual gives calculated quantities of 1, 2, 2 and 4 units for ABB S201 B10, B16, C10 and C16 breakers respectively. These values apply to that breaker series; select protection for the actual installation. Operation and reset This supply requires no ETS configuration. Hold RESET for at least 20 seconds to reset the bus. If overload or a short circuit is indicated, remove the cause before resetting.

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