Unit installation

Liebert iCOM Control
16
5.2.1 Setting the Remote Rack Sensor Address
Remove the cap on the rear of the plastic sensor housing. This cap protects the switch selection (SW1)
that sets the node address of the sensor. Each sensor must have a unique address to communicate
correctly with the Liebert CRV. Follow Table 5 until all connected sensors have been configured.
Switches 1 through 6 are used to configure the node address.
Figure 14 Remote rack sensor access point
5.2.2 CAN Bus Termination
The last or end sensor of the sensor network requires a jumper on the circuit board moved for proper
termination of the sensor network. This termination helps to reduce noise and reflections on the sen-
sor network. The sensor at the physical end of the network is the sensor with only one cable plugged
into it.
To correctly position the termination jumper:
1. Unplug all connections to the sensor.
2. Remove the three screws holding the sensor housing together.
3. Locate the P3 jumper directly above the left network connection port.
4. Change the jumper selection from Pins 1 and 2 to Pins 2 and 3 (see Figure 15).
Table 5 Sensor address configuration settings
CAN Node
Address SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6
Comment
20 Off Off ON Off ON Off Rack sensor 1
21 ON Off ON Off ON Off Rack Sensor 2
22 Off ON ON Off ON Off Rack Sensor 3
23 ON ON ON Off ON Off Rack Sensor 4
24 Off Off Off ON ON Off Rack Sensor 5
25 ON Off Off ON ON Off Rack Sensor 6
26 Off ON Off ON ON Off Rack Sensor 7
27 ON ON Off ON ON Off Rack Sensor 8
28 Off Off ON ON ON Off Rack Sensor 9
30 Off ON ON ON ON Off Rack Sensor 10
DIP Switch
Access Hole