We have expanded our CW-300 series for test bench technology with the CW-322, a module designed to control up to 20 signal relays via CAN bus. This module not only supports targeted actuation of a single relay, but also synchronized control of several relay channels.

The open design of the top-hat rail housing (45 mm to DIN) offers the user a fast, simple and at the same time cost-effective solution to automate switching signals, no matter if for every-day tasks in automation technology or on test benches.

The hole matrix integrated in the CW-322 makes it possible to add additional components to influence a relay channel or several signal paths, e.g. passive filter levels or the targeted merging or mixing of different signals.

In conjunction with the bus technology modules CW-101 and CW-102 it is possible to transfer measurement data via USB or Ethernet to a PC on the one hand, and to alter the configuration of the module on the other. A software API written in C/C++ and C# facilitates incorporating the module in proprietary programs.


  • Up to 20 channels with signal relays
  • Control via CAN bus
  • Selective control of a single channel or simultaneous control of several channels possible
  • Hole matrix for own switching components (filter levels, etc.)
  • Quick and easy to install, suitable for top-hat rail (45 mm to DIN)
  • Easy to extend and scale channels

Technical Data


Number: 20
Switching current: ≤ 2 A at 120 VAC / 60 VDC
Switching power: 60 VA / 24 W
Switching cycles: ≥ 100.000
Switch type: SPDT
Galvanic seperation: Relay channels


Number: 1
Type: ISO 11898-2 (highspeed)
CAN-protocol version 2.0 A and 2.0 B, supports SAE J1939 (29-bit-identifier)
Data rate: 500 kbit/s, on request: 50, 100, 125, 250, 500, 800 and 1000 kbit/s
Termination: 120 Ohm, optional activation via jumper


Supply voltage: 7 VDC to 30 VDC
Power consumption: 22 mA at 12 VDC (unswitched)
360 mA at 12 VDC (all relays switched on)

Environmental conditions

Temperature range operation: -10 °C to +70 °C
Temperature range storage: -20 °C to +85 °C
Relative humidity: 35 % to 85 % non-condensing

General information

Housing: 45 mm DIN-top-hat rail housing
Dimensions (LxWxH): 110 mm x 125 mm x 46 mm
Weight: 245 g


Datasheet CW-322

Download (PDF)

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