Liebert CR020 User Manual page 44

34 Chapter 6 Electrical Connections
Sensor chain–CAN termination
The CAN Bus of sensor chain needs to be terminated. If a CAN device is the last component in the CAN Bus, the
termination jumper has to be set to pin 2 and pin 3. If a CAN device is in the middle between other CAN devices, no
termination has to be set, the jumper remains on pin 1 and pin 2.
To connect the temperature probes to use only cable with these characteristics:
6 wires, 3 couples, shielded twisted pair
Termination: RJ12
3 × 2 × 0.14mm
Plenum rated
300V
-5°C ~ +70°C
Flexible
Characteristic impedance of between 108Ohm and 132Ohm@50kHz
Conductor resistance < 150Ohm/km
Flame retardant
Black jacketing
Figure 6-8 Use provided support to fix each probe
2
(min), twisted pairs, shielded
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