MEAN WELL RKP-CMU1 is a standalone monitor and controller for compatible MEAN WELL power supplies. It provides an LCD with local buttons, PMBus monitoring and control, PC communications, time-stamped records and four programmable relay outputs. It is a control accessory, not an AC/DC front-end rectifier or a high-power DC output module.
Product Datasheet
Download MEAN WELL RKP-CMU1 Datasheet (PDF)
The RKP-CMU1 section is on PDF pages 38, 39, 40, 41, 42, 43, 44. Refer to the complete mechanical drawings and notes when planning installation.
Controller Identity and Installation
| Product model |
RKP-CMU1 |
| Dimensions |
147.5 × 127 × 41 mm (L × W × H); case 959A, 1U low-profile control module. |
| Catalogue unit weight |
0.8 kg (800 g), catalogue packing reference per unit; not a measured net or shipping weight. |
| Mounting |
Use the positions shown on PDF page 41, M3 screws with maximum penetration 6 mm and recommended tightening torque 6–8 kgf·cm. General drawing tolerance is ±0.5 mm. |
This SKU supplies the standalone control module. The RKP-1UI-CMU1 and RKP-1UT-CMU1 codes identify rack shelves fitted with a controller; their power-supply positions, AC connections, dimensions and weight are separate configuration details.
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 standalone controller, EAC is listed as approved and TUV BS EN/EN62368-1 is the stated design reference. Output–FG withstand is 0.7 kVDC; insulation resistance is 100 MΩ at 500 VDC, 25°C and 70% RH.
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.
