MEAN WELL RCP-3K1UI-12-C is a fully populated 19-inch, 1U AC/DC power system using three RCP-1000 modules in parallel. Its 12 V output is rated at up to 180 A and 2160 W. The I version uses IEC 320-C14 AC inlets. The -C suffix specifies I²C communication.
Product Datasheet
Download MEAN WELL RCP-1U Datasheet (PDF)
The RCP-1U section is on PDF pages 1, 2, 3, 4, 5, 6, 19, 20, 21, 22, 23, 24. Refer to the complete mechanical drawings and notes when planning installation.
Complete System Ratings
| Rated output voltage |
12 V. |
| Rated output current |
180 A maximum for the complete three-module system. |
| Rated output power |
2160 W maximum for the complete system; subject to input and temperature derating. |
| Installed module configuration |
Three RCP-1000-12C modules operating in parallel. |
| Input voltage / frequency |
90–264 VAC or 127–370 VDC; 47–63 Hz. |
| Typical AC current per module |
8.5 A at 115 VAC; 4.5 A at 230 VAC. |
| System leakage current |
Less than 3.5 mA at 230 VAC. |
| Catalogue packing reference per system |
13.2 kg (13200 g); one complete power-supply system per carton. |
| Communication |
I²C-equipped -C configuration. |
The shelf series name is not a substitute for this model’s printed maximum power. The catalogue describes active current sharing across up to three racks and a system ceiling of 8000 W; observe that ceiling as well as every rack, module and derating limit.
Installed Module Performance and Protection
| Per-module ripple / voltage adjustment |
150 mVp-p maximum; built-in adjustment 11.6–12.4 V. |
| Per-module tolerance / line / load regulation |
±1.0% / ±0.5% / ±0.5%. |
| Per-module typical efficiency |
81% at 230 VAC and rated module load. |
| Per-module set-up / rise / hold-up |
1000 / 60 / 16 ms at 230 VAC, full module load. |
| Short circuit / overload |
105–125% of rated module output power; constant-current limiting with automatic recovery after the fault is removed. |
| Overvoltage protection |
13.2–16.2 V; shutdown, re-power to recover. |
| Overtemperature protection |
Output shutdown; automatic recovery after cooling. |
| Cooling / hot-swap |
Built-in speed-controlled fans and OR-ing diodes in the RCP-1000 modules. |
Module performance values refer to the installed RCP-1000 model. At light load during multiple-rack operation, ripple may exceed the single-module specification; the specified ripple level is restored above 10% output load.
Rack Construction and Installation
| Rack width × depth × height |
483.6 × 350.8 × 44 mm; 19-inch, 1U format. |
| AC connection |
Three IEC 320-C14 AC inlets, one per module position. |
| Power output |
Use the rack bus/output terminals marked +V and -V; CN500 signal pins are not load-current terminals. |
| Side mounting |
M5 screws; maximum penetration depth 6 mm, recommended tightening torque 10 kgf·cm. |
| Mechanical clearances |
Physical catalogue page 23 shows the handle projection, rear terminals, rack ears and air path; keep the module fan inlets and rear exhaust clear. |
| Control connector |
CN500: female, right-angle 25-position D-type connector. Select its mating part to the actual connector drawing and wiring requirements. |
The shelf is designed for RCP-1000 modules; the differently wired RHP-1U and RKP-1U families use their own module and system documentation.
Rack Control Interface
CN500 groups A/B/C: remote ON/OFF pins 1/8/15, AC OK pins 2/9/16, DC OK pins 3/10/17, V TRIM pins 4/11/18, and T-Alarm pins 5/12/19. Short each remote input to -S pin 21 for ON; leave it open for OFF.
CN500 pin 6 is 5V-AUX, 4.3–5.3 V at 0.3 A maximum; pin 7 is its isolated return GND-AUX. This OR-ing-isolated auxiliary remains available when remote control disables the main output. Pin 14 is CS; link CS between parallel units for current balance.
Pins 20/21 are +S/-S. Connect a twisted sense pair to the load for up to 0.5 V drop compensation. For local sensing link pin 20 to +V signal pin 22 and pin 21 to -V signal pin 25. Pins 23/24 are SCL/SDA for the I²C-equipped system configuration.
AC OK is low at 0–0.5 V when input is at least 82 V ±4 V and high at 4.5–5.5 V below that threshold. DC OK is low when output is at least 80% ±5% of nominal and high below that threshold. T-Alarm provides a module temperature-warning output; confirm its applicable CN500 logic level in the supplied rack interface documentation before connecting a shutdown or interlock input.
For each installed module, use its V TRIM pin: A/B/C = CN500 pins 4/11/18. R1 connects +S pin 20 to V TRIM; R2 connects V TRIM to -S pin 21. Use resistors rated at least 0.1 W; N.C. means no connection. Maintain the local sense-to-output links shown in the programming diagram.
For output levels 90/92/94/96/98/100% respectively, R1 values are 180 kΩ, 240 kΩ, 350 kΩ, 560 kΩ, 1.2 MΩ, N.C.. For output levels 100/102/104/106/108/110% respectively, R2 values are N.C., 300 kΩ, 120 kΩ, 62 kΩ, 31 kΩ, 13 kΩ.
Temperature and Measurement Conditions
| Working temperature |
-20°C to +60°C; apply the module load curve. |
| Working / storage humidity |
Working: 20–90% RH; storage: 10–95% RH; non-condensing. |
| Storage temperature |
-40°C to +85°C. |
| Temperature coefficient |
±0.02%/°C from 0°C to +50°C. |
| Vibration |
10–500 Hz, 2 G, 10-minute cycle; 60 minutes each along X, Y and Z. |
The installed RCP-1000 module curve permits full load to +50°C and 60% load at +60°C. Input derating is 90% at 90 VAC, rising to full load at 100 VAC and remaining there through 264 VAC. Apply both limitations to the complete system.
Above 2000 m, reduce the fan-cooled ambient limit by 5°C per 1000 m. Unspecified test parameters use 230 VAC, rated load and 25°C. Ripple is measured at 20 MHz with a 12-inch twisted pair and parallel 0.1 µF / 47 µF termination capacitors.
Catalogue Safety and EMC
| Safety standards |
UL 62368-1; CSA C22.2 No.62368-1; TUV BS EN/EN 62368-1; EAC TP TC 004. |
| Dielectric withstand |
Input/output 3 kVAC; input/FG 2 kVAC; output/FG 0.7 kVDC. |
| Insulation resistance |
100 MΩ at 500 VDC, 25°C and 70% RH. |
| EMC |
BS EN/EN 55032 conducted and radiated Class B; EN 55035 / EN 61000-6-2 immunity; ESD 8 kV air / 4 kV contact; surge 4 kV line-to-earth / 2 kV line-to-line. |
The catalogue describes a component power-supply system; verify the final equipment’s EMC performance with its actual installation. The documented EMC arrangement uses a 720 × 360 × 1 mm metal plate. The catalogue lists a five-year warranty.
