3-Fold Signal Relay Interface

We have expanded our CW-300 series for test bench technology with the CW-329, a module designed to optionally control up to 3 signal relays via CAN bus or digital inputs. 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 low current signals (up to 1 A), no matter if for every-day tasks in automation technology or on test benches.

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 3 channels with a signal relay
  • Control via CAN bus and digital inputs
  • Sleep mode for low current consumption when deactivated
  • Selective control of a single channel or simultaneous control of several channels possible
  • Quick and easy to install, suitable for top-hat rail (45 mm to DIN)
  • Easy to extend and scale channels


Technical Data


Number of relays: 3
Switching current: ≤ 1 A at 120 VAC / 60 VDC
Switching power (max.): 60 VA / 24 W
Switching cycles: ≥ 100.000
Switch type: SPDT
Digital inputs: 3 (9 VDC to 15 VDC)


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: 50, 100, 125, 250, 500, 800 and 1000 kbit/s
Termination: 120 Ohm, optional activation via jumper

power supply

Supply voltage: 7 VDC to 30 VDC
Current consumption: 77 mA at 12 VDC

Environmental conditions

Temperature range operation: -20 °C to +65 °C
Temperature range storage: -20 °C to +85 °C
Relative humidity: 35 % to 85 %, non-condensing

general information

Housing: 45mm-DIN-Top-hat rail housing
Dimensions (LxWxH): 40 mm x 90 mm x 55 mm
Weight: 68 g


Datasheet CW-329

Download (PDF)

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