Vertiv Liebert XD Series, System Design Manual

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Module Allowable Total CAN Cable Length, ft (m)
Liebert XDV8 580 (177)
Liebert XDV10 580 (177)
Liebert XDO16 590 (180)
Liebert XDO20 590 (180)
Liebert XDH20 580 (177)
Liebert XDH32 585 (178)
*The internal CANbus cable within the Liebert XD module and the remote sensors has been accounted for.
Table 3.22 Allowable total CAN cable length
Figure 3.32 Single daisy chain of Liebert XDO smart modules in CANbus network
Cable
Segments
Length of Each ft. (m) Cumulative Length ft. (m)
14 6 (1.8) 84 (25.6)
1 20 (6) 20 (6)
1 30 (9.1) 30 (9.1)
Combined cable length 134 (40.8)
Table 3.23 Cumulative cable length in Figure 3.32 above
The cumulative length of cable used in the example in Figure 3.32 above is 134 ft. (40.8m), far shorter
than the maximum allowable cable run of 580 ft. (177m) for Liebert XDV10 modules.
3.27.3 Remote Sensor Placement Within the CANbus
Two remote sensors are shipped with the Liebert XDP. One shielded CANbus cable is provided with each
sensor. Sensor A is to be connected to the directly the Liebert XDP. Sensor B is to be connected to the
CANbus within the smart module chain. This can be at the end of the chain as shown in Figure 3.33 on
the facing page. For proper placement within the room, see
Temperature/Humidity Sensor Locations on
page 60.
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