General description
The RCM41 is a distributor module designed for CANopen and Modbus RTU buses simultaneously, through 4 front RJ45 connectors and 4 side connectors.
Both the CANopen and Modbus buses have independent transient protection via TVS protection diodes, ensuring ESD protection along the entire line.
Key features
- Dual distribution: CANopen and Modbus RTU simultaneously in a single module.
- 8 connectors: 4 front RJ45 + 4 side connectors.
- ESD protection: Independent TVS diodes for each bus.
- End-of-line resistors: Switchable via DIP switches (SW1 for CANopen, SW2 for Modbus).
- Modular system: Side connectors with tongue-and-groove design for direct module interconnection.
- DIN rail mounting.
Dimensions
| Parameter | Value |
|---|---|
| Width | 39 mm (43 mm with side connector) |
| Height | 90 mm |
| Depth (on DIN rail) | 52 mm |
Connections
The module features side connectors with a tongue-and-groove system that allows connecting multiple modules without cables. The left-side connectors can also be used for cable output. The compatible cable connector is the PTSM 0.5/4-P-2.5 WH (1704857) from Phoenix Contact.
Recommended cable: 3×0.22 mm² shielded or 3×0.5 mm² shielded.
RJ45 pinout
| Pin | Signal |
|---|---|
| 1 | CAN_H |
| 2 | CAN_L |
| 3 | CAN_GND |
| 4 | MB_D1 (A) |
| 5 | MB_D0 (B) |
| 6 | Not used |
| 7 | VP |
| 8 | MB_GND |
Configuration jumpers (PCB)
On the bottom side of the PCB there are several optional jumpers:
| Jumper | Function | Default |
|---|---|---|
| J1 | Connect CANopen GND to Modbus GND | Open |
| J2 | Connect shield to CANopen GND | Open |
| J3 | Connect shield to Modbus GND | Open |
| J4–J7 | Join pin 7 (VP 5 V) across connectors | Open |