5. Communication
5.1 Wiring instructions
Cable
Belden 3106 A or equivalent. 22 AWG (0.324 mm
2
) shielded twisted pair, min. 95 % shield coverage.
Cable shield
Connect the cable shield to earth at one end only.
GND terminal connection
In case of communication problems, the GND terminals of the CGC 400 unit and the external device can be
linked together using a third wire.
CAN bus termination resistor
The size of the terminating resistors should be 120 Ω 1 %, 0.5 W resistor.
Never connect the GND terminal to earth directly or through the shield!
If the GND terminal is connected to a PLC or other device, the GND connection of this device
must be isolated from earth!
Maximum length of the CAN bus line is 400 m.
CGC 400 installation instructions
4189340785 UK
Communication
DEIF A/S Page 21 of 25
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