Remote Rack Sensor Wiring
147 Liebert
®
CRV
™
13.5 Route the CANbus Wire into the Cooling Unit-600mm (24")
The CANbus sensors connect to the open CAN port on the back of the unit display panel. The display
comes terminated from the factory and must be unterminated to allow connecting additional sensors.
See Figure 126 for termination jumper location for front panel display and sensor boards. Note that
connecting the CAN bus sensors will require entering the high-voltage electrical compartment of the
Liebert CRV. Emerson recommend having installation performed by a properly trained and qualified
electrician.
Figure 129 Route the CANbus wire into the cooling unit-600mm (24")
Connect the 10ft CAN wire to the open CAN bus port on the rear of the Liebert iCOM.
Ensure there is enough slack in the wire to allow the door to open and close freely, but not so much
that the wire could be in a bind or pinched when the door is shut. Emerson recommends securing the
wiring with cable ties.
Connect the other end of the 10ft. (3m) CAN cable to the nearest 2T rack sensor. Use additional CAN
cables to connect the remaining 2T rack sensors to each other. The order in which the 2T temperature
and humidity sensors are attached does not matter; however, be sure that the last sensor connected is
the one set to “terminated.” Avoid using excessive lengths of cable between sensors.
DPN001983
Rev. 0
Inside of Display Door
Top Entry Wiring in Field
As Shipped, No Field Wiring Connected
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