MEAN WELL RKP-6K1UT-CMU1-48 is a 48 V, 1U rack AC/DC power supply system with AC terminal blocks and an RKP-CMU1 monitor/controller. The CMU rack drawing provides two rectifier positions, so its available output must be assessed for that two-module configuration; the three-module system table is not its unconditional rating.
Product Datasheet
Download MEAN WELL RKP-1U Datasheet (PDF)
The RKP-1U section is on PDF pages 13, 14, 15, 16, 17, 18, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44. Refer to the complete mechanical drawings and notes when planning installation.
System Configuration and Output
Nominal DC output
48 V
Installed rectifiers
2 × RCP-2000-48
Two-module calculated output ceiling
84 A / 4032 W
Per-module rating
48 V / 42 A / 2016 W; output current range 0–42 A per rectifier.
Per-module adjustment / accuracy
42–56 V adjustment; tolerance ±1%; line regulation ±0.5%; load regulation ±0.5%.
Per-module ripple / conversion
300 mVp-p maximum; typical efficiency 92% and power factor 0.98 at 230 VAC / full load.
Timing
RCP-2000 set-up 1500 ms and rise time 60 ms at 230 VAC / full load. Hold-up: 16 ms at 230 VAC / 75% load, 10 ms at 230 VAC / full load.
The 84 A / 4032 W figure is the arithmetic sum of two RCP-2000-48 module ratings, not a separately printed three-module system rating. Confirm the supplied module population and apply all input-voltage, temperature and parallel-operation limits. The three-module reference table gives 126 A / 6048 W for 48 V; that higher figure must not be assigned to this two-position CMU rack.
All installed rectifier outputs are paralleled. Active current sharing and hot-swap capability support distributed and redundant system arrangements, but redundancy reserve reduces usable load capacity. If component tolerances cause successive overload limiting at full parallel load, the catalogue recommends reducing total output current by 10%. With more than one rack connected, ripple may be higher at light load and returns to the normal level above 10% output load.
The RKP-1U platform describes up to three rack shelves / nine RCP-2000 rectifiers and an 18 kW class expansion. The actual total is limited by the selected output voltage, number of power modules, CMU positions, input and thermal conditions; it is not a guaranteed capacity for every shelf configuration.
Input, Protection and Derating
Input voltage / frequency
90–264 VAC, 47–63 Hz. For the installed RCP-2000 modules, the normal specified DC range is 250–320 VDC; operation at 320–370 VDC requires confirmation from MEAN WELL.
AC current / leakage
The rack system table gives 16 A at 115 VAC and 11 A at 230 VAC per module. Rack-system leakage current is <3.5 mA at 230 VAC. The individual rectifier specification separately lists 10 A at 230 VAC and leakage <1.1 mA; size system wiring to the applicable complete-system rating.
Inrush / surge
Installed rectifier cold-start inrush: 50 A. The rectifier feature list states tolerance of a 300 VAC input surge for 5 seconds; this is not a continuous input rating.
Overload / short-circuit protection
RCP-2000 overload range: 105–125% of rated output power, with constant-current limiting followed by output shutdown after 5 seconds. Re-power to recover. The module features include short-circuit protection.
Overvoltage / overtemperature
RCP-2000-48 overvoltage threshold: 57.6–67.2 V; output shuts down and requires re-powering. Overtemperature shuts down the output and automatically recovers after cooling.
The RCP-2000 thermal curve is for horizontal installation: full rated load through 50°C, falling to 50% at 70°C. Its operating range starts at −35°C, with −35 to −25°C marked for 230 VAC input only. The CMU controller itself is limited to −25 to +70°C and its LCD may freeze below −10°C; apply this narrower complete-system range.
At 60 Hz input, full rectifier output is available over the 180–264 VAC portion of the static-characteristic curve. Per-module low-line limits: 115 VAC: 1612.8 W / 33.6 A; 100 VAC: 1512 W / 31.5 A; 90 VAC: 1310.4 W / 27.3 A. Apply input and ambient derating together, then multiply only by the number of installed modules.
Built-in fans with fan-speed control cool the rectifiers; preserve the airflow indicated on the drawings. The rectifier includes active PFC, an output OR-ing FET, hot-swap operation and up to 25 W/in³ module power density. These are installed-module features, not independent power conversion performed by an empty rack. Conformal coating is an optional rectifier treatment, not specified by the rack order code.
Rack Control Connections and Status
CN500 interface
Right-angle female 25-position D-type connector. 1 / 7: remote ON/OFF; 2 / 8: AC OK; 3 / 9: DC OK; 4 / 10: PV; 5 / 11: temperature alarm; 6 / 12: fan fail, for rectifiers A / B respectively. Pins 16–21 are NC. Pins 13: +5V-AUX; 14: +12V-AUX; 15: GND-AUX; 22: +S; 23: −S; 24: +V signal; 25: −V signal.
Remote ON/OFF
For channels A / B, short CN500 pin 1 / 7 respectively to pin 13 (+5V-AUX) for ON; open for OFF. Control channels together or individually as required.
Auxiliary outputs
5 V / 0.3 A (4.5–5.5 V) and 12 V / 0.8 A (10.8–13.2 V), referenced to GND-AUX pin 15. Outputs include OR-ing diodes and are not switched by remote ON/OFF. GND-AUX is isolated from the main +V and −V.
Remote sense / local sense
Connect +S pin 22 and −S pin 23 to the load using a twisted pair; compensation is up to 0.5 V. For local sensing, link 22 to 24 and 23 to 25. Pins 24 and 25 are signal references, not load-current connections.
Voltage programming uses CN500 PV pins 4 / 10 relative to pin 25 (−V signal). External control is 0–5 V for the plotted 90–110% nominal-output range; marked points include 1.5 V for 90%, 3 V for 100% and 4.5 V for 110%. Follow the full curve, including its end regions. Above 100% output voltage, reduce load current; the graph shows 90% rated current at 110% voltage.
AC OK / AC LED: input ≥87 Vrms gives 0–0.5 V and green / output ON; input ≤75 Vrms gives 4.5–5.5 V and red / output OFF. DC OK / DC LED: output above the 80% ±5% rated-voltage threshold is low / green; below the threshold is high / red. The DC-low alarm table still shows the PSU output ON; it is not an automatic shutdown declaration.
Temperature status: both internal thermal switches closed gives low / green and output ON; either switch open gives high / red and output OFF. Fan-fail is high on a fan fault and low during normal operation. Other isolated control/status signals are referenced to GND-AUX; do not substitute the main −V reference.
JK1 is a double-layer RJ45 connection: pin 1 DA and pin 2 DB are non-isolated differential parallel-control signals; pin 3 is −V signal reference; pin 4 CONTROL is the remote-PMBus control signal; pin 5 NC; pin 6 SDA; pin 7 SCL; pin 8 GND-AUX. The bus follows PMBus revision 1.1, up to 100 kHz. Do not use the signal-reference pins as load returns.
Mechanical Installation and Module Interface
Dimensions
350.8 × 483.6 × 44 mm (L × W × H), with mounting brackets; body width 440 mm. The shelf height is 1U.
Catalogue unit weight
Confirm the mass of the supplied configuration; no single-unit mass is assigned here.
AC and chassis installation
2 AC terminal blocks, with FG, AC/N and AC/L identified on the rear drawing. Connect protective earth to FG. Follow the drawing for the selected I or T version; AC connections are separate for the module positions.
Mounting screws
Three M5 mounting positions on each side; maximum screw penetration 6 mm. Follow the drawing’s 125 mm longitudinal spacing and dimensional references. General drawing tolerance is ±0.5 mm.
Use the drawing on PDF page 42 for the actual bracket width, rear connector arrangement and module positions. Maintain access to module handles and unrestricted fan airflow; the rectifier’s 41 mm height is distinct from the shelf’s 44 mm overall height.
The installed RCP-2000 interface is Positronic PCIM34W13M400A1; the printed mating reference is PCIM34W13F400A1. Select the correct mating and wire assembly; this connector reference is not a statement that a separate spare connector is included.
Rectifier CN501: +V pins 1–4; −V pins 5–8; pin 9 −V signal, 10 +V signal, 11 PV, 12 DA, 13 DB, 14 +S, 15 −S; address A0–A4 on 16 / 18 / 19 / 20 / 21; pin 17 remote ON/OFF, 22 NC, 23 SDA, 24 SCL, 25 AC OK, 26 DC OK, 27 temperature alarm, 28 fan fail, 29 +5V-AUX, 30 +12V-AUX, 31 GND-AUX, 32 FG, 33 AC/L and 34 AC/N. The module status outputs are isolated, referenced to GND-AUX and limited to 10 mA sourcing. Rack CN500 numbers are different from these module-interface numbers.
Safety, EMC and Operating Conditions
The rack power-system specification lists UL 62368-1, CSA C22.2 No. 62368-1, TUV BS EN/EN 62368-1 and EAC TP TC 004 approvals. Dielectric withstand: input–output 3 kVAC, input–FG 2 kVAC and output–FG 0.7 kVDC. Insulation resistance for these paths: 100 MΩ at 500 VDC, 25°C and 70% RH.
For the rack power system, BS EN/EN55032 (CISPR32) conducted and radiated emissions are Class A. Harmonic current and flicker are listed under BS EN/EN61000-3-2 and -3-3. Immunity: BS EN/EN55035 and BS EN/EN61000-6-2; ESD level 3 / 8 kV air and level 2 / 4 kV contact; RF, EFT and conducted immunity level 3; surge level 4 / 4 kV line–earth and level 3 / 2 kV line–line; magnetic field level 4. Voltage-dip tests: >95% for 0.5 periods and 30% for 25 periods; interruptions >95% for 250 periods.
Working humidity: 20–90% RH, non-condensing. Storage: −40 to +85°C, 10–95% RH, non-condensing. 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. Operating temperature is limited by the installed rectifier and controller as well as the rack.
Above 2000 m, reduce allowable ambient temperature by 5°C per 1000 m for fan-cooled models, or 3.5°C per 1000 m for fanless models; this rule does not establish an unrestricted maximum operating altitude. The product is a component for incorporation into final equipment. EMC tests use a 720 × 360 × 1 mm metal plate, and the final equipment must be rechecked.
Unless specified otherwise, measurements use 230 VAC, rated load and 25°C. Ripple/noise uses 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF in parallel. Tolerance includes initial setting, line and load regulation. The catalogue lists a 5-year warranty. Applications include industrial automation, distributed power, telecommunications, redundant power, EV-charger and constant-current systems, subject to complete-system requirements.
CMU Monitoring, Control and Logging
Controller supply / display
12–15 VDC input; 1 A at 12 V or 0.8 A at 15 V. LCD: 16 × 2 alphanumeric characters, with local control buttons; green power and red alarm indicators.
Interfaces / monitored values
PMBus to the power supplies; USB, RS232 and Ethernet for PC connection. Display or monitor output DC voltage, load current, internal temperature, input voltage, operating status, serial number and firmware version.
Compatible power supplies
The standalone RKP-CMU1 supports RCP-1600, RCP-2000 and DRP-3200 families; the RKP-1U rack configuration shown here uses RCP-2000. Check controller and supply firmware compatibility before integration.
PC and local operation
Use the LCD/buttons without a PC, or the catalogue PC monitoring software / web interface through the applicable connection. Remote operation through a GSM modem requires the external communications arrangement.
PMBus revision 1.1 operates at up to 100 kHz. Output voltage and the overcurrent setting can be controlled through the supported commands. ON/OFF can be commanded for one unit or a group, using CN500 remote controls, JK1 CONTROL or the PMBus OPERATION command as appropriate to the wiring and power supply.
The real-time clock supports time-stamped monitoring and events. The data log stores 1000 records with a configurable interval of 1–60 minutes. The event log stores 600 records for alarm occurrence and clearance. Use the controller manual and the actual supply model to establish the supported device count; the RCP-2000 documentation specifies control of up to nine supplies. The menu’s PSU 0–31 address range is not a promise that one RKP shelf holds 32 units.
Four programmable changeover relays can respond to any alarm, overvoltage, overload, short circuit, overtemperature, high temperature, AC failure, fan lock or PMBus error. They can follow a PSU ON/OFF condition immediately (0 seconds) or with a delay of 1–600 seconds, or respond to digital inputs D-IN1 through D-IN4. Each relay is limited to 30 VDC / 1 A with a resistive load.
CMU Connector and Wiring Details
CN503 digital input uses HRS DF11-8DP-2DS or equivalent: pins 1 / 3 / 5 / 7 are D-IN1 / D-IN2 / D-IN3 / D-IN4; pins 2 / 4 / 6 / 8 are GND-FG. Open circuit or an applied +5 V is logic 1; short circuit or 0 V is logic 0. GND-FG is isolated from the main −V and from GND-AUX.
CN502 is the 9-position male D-type RS232 connector. RXD is pin 2 and TXD is pin 3; pins 1, 6, 7, 8 and 9 are NC. Confirm the ground/reference assignment and the complete serial-cable wiring for the supplied controller before connecting it.
JK500 Ethernet is RJ45: pin 1 TX+, pin 2 TX−, pin 3 RX+, pin 6 RX−; pins 4, 5, 7 and 8 are NC. The separate JK1 PMBus connector uses pin 1 DA, 2 DB, 3 −V signal, 4 CONTROL, 5 NC, 6 SDA, 7 SCL and 8 GND-AUX.
TB4 relay block: DECA MX422-25412 or equivalent. Normally-open contacts are pins 1 / 4 / 7 / 10; normally-closed contacts are 2 / 5 / 8 / 11; common contacts are 3 / 6 / 9 / 12. Use the 30 VDC / 1 A resistive-load maximum for every relay.
SK100 DC input connector: Schurter 4840.2201 or equivalent; pin 1 is +VIN and pin 2 is −VIN. The recommended supply families are GS12, GS15, GS18, GE12, GE18 and GST18. Select a complete adapter with 12–15 VDC output, adequate current, correct polarity and a physically compatible connector; this family list does not specify an included adapter or a particular full ordering code.
The connector references identify the components shown in the controller drawing. Mating parts, cables and external modem or adapter arrangements must be selected for the application; they are not an automatically included accessory kit.
CMU Environment and Compliance
The controller operates from −25 to +70°C; the LCD may freeze below −10°C. Working humidity is 20–90% RH, non-condensing; storage is −40 to +85°C and 10–95% RH, non-condensing. Vibration: 10–500 Hz, 2 G, 10 minutes per cycle, 60 minutes on each axis. Apply the lower allowable range of the controller and any installed power supply.
For the CMU-equipped rack, the controller table lists UL 62368-1, CSA C22.2 No. 62368-1, TUV BS EN/EN62368-1 and EAC approvals. Withstand: input–output 3 kVAC, input–FG 2 kVAC, output–FG 0.7 kVDC; insulation resistance is 100 MΩ at 500 VDC, 25°C and 70% RH for these paths.
The CMU specification lists BS EN/EN55032 conducted Class B and radiated Class A, BS EN/EN61000-3-2 / -3-3 and EAC TP TC 020. Listed immunity includes BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11, BS EN/EN61000-6-1 and BS EN/EN55035 for light industry. A populated power rack must also comply with its complete power-system EMC conditions.
MTBF reference: 671.5 khr minimum under Telcordia SR-332 (Bellcore), and 110.5 khr minimum under MIL-HDBK-217F at 25°C. The controller catalogue lists a 5-year warranty. For its isolation assessment, SK100 and connectors other than CN502, CN503 and USB are considered output circuits. Above 2000 m, apply the catalogue ambient derating of 3.5°C per 1000 m for fanless models and 5°C for fan-cooled models. EMC component testing uses a 720 × 360 × 1 mm plate; confirm the completed equipment’s compliance.
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