MEAN WELL RHB-8K1UI-12CAN is a 1U rack charger system using matching RCB-1600-12CAN modules. Its catalogue configuration provides a default boost voltage of 14.4 V, float voltage of 13.8 V and total charge-current range of 0–500 A. It uses five IEC320-C14 AC inlets and CANBus communication.
Product Datasheet
Download MEAN WELL RHB-1U Datasheet (PDF)
The RHB-1U section is on PDF pages 25, 26, 27, 28, 29, 30, 31, 32. Refer to the complete mechanical drawings and notes when planning installation.
Model and System Configuration
| Complete model |
RHB-8K1UI-12CAN |
| Configuration |
1U Rack Battery Charger System; 1U / 19-inch format with five module positions. Nominal module voltage: 12 V. |
| AC connection version |
I version: five IEC320-C14 AC inlets. |
| Communication option |
CANBus. The CAN suffix selects the by-request CANBus option; confirm that the supplied modules and rack use the same protocol. |
| Output module / rack |
RCB-1600-12CAN; rack RHP-1UI-ACAN. |
The bare rack and a populated system are different ordering configurations. Confirm the installed module quantity, voltage and communication interface for the ordered assembly. Module hot-plug capability does not remove the need to follow the manufacturer’s installation and service instructions.
Charging Output
| Nominal battery-system voltage |
12 V. |
| Default boost voltage |
14.4 V. |
| Default float voltage |
13.8 V. |
| Total charging-current range |
0–500 A with all selected RCB module outputs in parallel. |
| Temperature compensation |
−3 mV/°C/cell; the 12 V model is specified as 6 cells. Connect the temperature-sensing function through CN2 RTH+ / RTH−. |
| Charging application |
Select the battery, charging settings and module population together. Boost and float voltage are different settings; the rack’s 8K name is not a separate guaranteed charging-wattage specification. |
Input, Cooling and Operating Limits
| Input voltage / frequency |
90–264 VAC or 127–370 VDC; AC frequency 47–63 Hz. Match the input supply to the installed RCB-1600 charger rating and apply low-line derating. |
| Per-module AC current |
14 A at 115 VAC; 8 A at 230 VAC. These figures are per module, not the total current of a five-module rack. |
| Per-module leakage current |
Less than 1.5 mA at 230 VAC per rectifier or charger. Total system leakage depends on the number of installed modules. |
Conversion, active PFC, fan cooling and electrical protection are functions of the installed rectifier or charger modules. Keep the module and rack airflow paths clear. Select matching overload, short-circuit, overvoltage and overtemperature characteristics from the applicable module specification.
The rack working-temperature range is −30 to +70°C, with derating. Low-line and ambient limits must both be observed; this range is not a full-load guarantee at every input voltage or temperature. Use the derating curve of the actual installed module revision. The RCP rectifier curve must not be used as an RCB charger curve.
Unless otherwise stated, rack specifications are measured at 230 VAC, rated load and 25°C. Ripple measurements use 20 MHz bandwidth and a 12-inch twisted pair terminated by 0.1 µF and 47 µF capacitors in parallel.
Programming and Application-Specific Sensing
| Voltage programming PV |
75–125% of nominal output voltage. CN1 pin 26, referenced to −V(signal) on pin 24. |
| Current programming PC |
20–100% of rated current; CN1 pin 25, referenced to −V(signal) on pin 24. |
| External-control curves |
The diagrams mark the relationships non-linear and show a transition at 0.4 V. For the controlled portion, 1 V corresponds to the minimum PV output and 4.7 V to 125% nominal output; PC is 20% at 1 V and 100% at 4.7 V. Follow the full curve rather than assuming one linear conversion. |
| Charger temperature connector |
CN2 pin 1: RTH+; pin 2: RTH−; pins 3 and 4: NC. These pins serve the temperature-compensation function; remote voltage sensing is not assigned to this charger connector. |
CN1 Control and Status
| Connector and mating parts |
Rack CN1: HRS DF11-26DP-2DS. Mating housing: HRS DF11-26DS or equivalent. Contact-family reference: HRS DF11-**SC or equivalent; specify the full contact variant for the selected wire assembly. |
| Module signal groups |
For modules A / B / C / D / E respectively: AC OK pins 1 / 5 / 9 / 13 / 17; DC OK pins 2 / 6 / 10 / 14 / 18; remote ON/OFF pins 3 / 7 / 11 / 15 / 19; T-Alarm pins 4 / 8 / 12 / 16 / 20. |
| AC OK |
High 3.5–5.5 V when input is at least 87 Vrms; low −0.5 to +0.5 V when input is at most 75 Vrms. Maximum sourcing current 10 mA; output signal only. |
| DC OK |
For this charger model, high indicates output at or below 8 V ±1 V and low indicates output at or above that threshold; DC OK is associated with battery-low protection. High is 3.5–5.5 V; low is −0.5 to +0.5 V. Maximum sourcing current 10 mA; output signal only. |
| Remote ON/OFF |
Connect the relevant module remote pin to +5V-AUX on pin 21: short / 4.5–5.5 V for ON; open / 0–0.5 V for OFF. Maximum input is 5.5 V. Control the module channels separately or together as shown in the diagram. |
| Temperature / fan alarm |
T-Alarm is high 3.5–5.5 V when the internal temperature exceeds the alarm limit or a fan fails; low −0.5 to +0.5 V during normal temperature and fan operation. Maximum sourcing current 10 mA; output signal only. |
| Auxiliary outputs |
Pin 21: +5V-AUX, 4.5–5.5 V at up to 0.3 A. Pin 23: +12V-AUX, 10.8–13.2 V at up to 0.8 A. Both reference pin 22 GND-AUX, have built-in ORing diodes and remain independent of remote ON/OFF. |
| Signal references |
AC OK, DC OK, T-Alarm and remote control are isolated signals referenced to GND-AUX. Pin 22 is isolated from the main +V/−V output. Pin 24 −V(signal), pin 25 PC and pin 26 PV are non-isolated; pin 24 is a control/local-sense reference, not a load terminal. |
Communication, CN2 and Status Indicators
| CN2 mating parts |
Rack CN2: HRS DF11-4DP-2DS; mating housing HRS DF11-4DS or equivalent, with contacts selected from HRS DF11-**SC or equivalent. Use the power-system or charger-system pin assignment appropriate to the installed modules. |
| JK1 RJ45 pin map |
1 DA and 2 DB: differential parallel-control signals; 3 −V(signal): their non-isolated reference, not a load connection. Pin 4 CONTROL: PMBus remote ON/OFF signal, isolated and referenced to GND-AUX. Pin 5: NC / reserved. Pin 8: GND-AUX, isolated from the main output. |
| JK1 selected communication pins |
CANBus version: pin 6 CANH; pin 7 CANL. Use the matching CANBus controller and module option; the PMBus clock specification does not describe CANBus. |
| Communication connection |
The RJ45 connector carries the assigned power-system control bus; it is not an Ethernet interface. Select the correct bus wiring and address-switch settings for the system. |
| Status LEDs |
Green: float, stage 3. Orange: charging, stages 1 or 2. Constant red: abnormal condition such as overtemperature, overload, fan failure or charging timeout. Flashing red at 60°C internal temperature is an early warning while operation continues, not an ambient-temperature rating or immediate OTP shutdown; the catalogue also describes a PMBus alarm indication. |
Dimensions, Installation and Supply
| Dimensions |
365 × 440 × 44 mm (L × W × H) without brackets; 365 × 482.6 × 44 mm with rack brackets. Case 242A; general drawing tolerance ±0.5 mm. |
| Rack mounting |
Follow the case drawing and bracket positions. Mounting holes marked 1 use M4 screws, maximum penetration 4 mm and recommended torque 7–10 kgf·cm. The drawing shows five side mounting positions on each side. |
| DC output connections |
The mechanical drawing specifies M8 × L16 output fasteners. The M4 mounting torque is not a tightening specification for the DC output fasteners; follow the supplied assembly instructions. |
| AC connection |
Five IEC320-C14 inputs, one for each module bay. Provide correctly rated mains leads for the actual installation. |
| Airflow / service |
Preserve the airflow path through the plug-in modules and the rear of the rack. Follow the mechanical drawing, module insertion orientation and hot-plug servicing instructions. |
| Supply configuration |
Specify the rack input style, communication option and matching module population. The connector mating housings and contacts are selection references; extra loose mating parts, AC leads and rack installation hardware are not stated as included. |
Confirm the mass of the exact supplied rack or populated assembly when planning installation and shipping. No configuration-specific mass is assigned here.
Environment, Insulation and EMC
| Working / storage |
Working: −30 to +70°C with applicable derating, 20–90% RH non-condensing. Storage: −40 to +85°C, 10–95% RH non-condensing. |
| Temperature coefficient / altitude |
±0.03%/°C over 0–50°C. Above 2000 m, the catalogue requires 5°C lower allowable ambient per 1000 m for fan-cooled models. This derating note does not by itself establish a maximum operating altitude. |
| Vibration |
10–500 Hz, 2 G, 10 minutes per cycle and 60 minutes along each X, Y and Z axis. |
| Catalogue safety standards |
UL 62368-1; TUV BS EN/EN 62368-1; EAC TP TC 004. Select the applicable system/module configuration; final equipment requires its own compliance assessment. |
| Dielectric withstand |
Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC. |
| Insulation resistance |
100 MΩ at 500 VDC, 25°C and 70% RH for input–output, input–FG and output–FG. |
| Emissions |
BS EN/EN55032 (CISPR32): conducted Class B and radiated Class A. Harmonic current: BS EN/EN61000-3-2; voltage flicker: BS EN/EN61000-3-3. The charger-system table also lists EAC TP TC 020. |
| Immunity |
BS EN/EN55035 and BS EN/EN61000-6-2; EN61000-4-2 / -3 / -4 / -5 / -6 / -8 / -11. The charger table states heavy-industry level, criteria A, and EAC TP TC 020. |
| Final-equipment EMC |
Rack EMC tests use a 1000 × 1300 × 1 mm metal plate. The rack supply is a component for installation in final equipment, which must be checked again for EMC compliance. |
| Manufacturer document / warranty |
RHP-1U rack-system specification dated 2024-09-04; the catalogue lists a 5-year manufacturer warranty. |
