Technical Specifications

Liebert iCOM
137
7.9 Network Layout Options
The Liebert XDP and Liebert XDC have two CANbus ports each (P2 and P4) on the CAN Isolator in
the low voltage side of the electrical box (see Figures 129 and 130). This allows for two chains of the
network to be created to minimize the total network length.
7.9.1 Remote Temperature/Humidity Sensor Placement and Connection to the CANbus
The Liebert XDP and Liebert XDC are shipped with two remote temperature/humidity sensors. One
sensor should be placed closer to the Liebert XDP or Liebert XDC; the other should be placed in the
warmest part of the cold aisle or in the return air stream of a computer room air conditioning unit,
such as as the Liebert DS
™
or Liebert CW
™
.
One shielded CANbus cable is provided with each sensor.
The remote sensors can be placed at the end of a chain or in the middle of a daisy chain as shown.
Refer to Figures 125 and 126 for examples of acceptable network layouts.
Figure 125 Modules on a single chain
Liebert
XDP/
XDC
Remote
Sensor A
Remote
Sensor B
Liebert
XDV
Rack Rack Rack Rack Rack
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Rack Rack Rack Rack Rack
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDP/
XDC
Remote
Sensor A
Remote
Sensor B
Liebert
XDV
Rack Rack Rack Rack Rack
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Rack Rack Rack Rack Rack
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDP/
XDC
Remote
Sensor A
Remote
Sensor B
Liebert
XDV
Rack Rack Rack Rack Rack
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV
Liebert
XDV