User manual

Installing a Liebert iCOM Unit-to-Unit Network
85 Liebert
®
iCOM
®
for Liebert DSE
™
5.3 Wiring for Unit-to-Unit Communications—U2U
Cooling units come from the factory-wired for stand-alone operation.
Liebert iCOM U2U Ethernet Network
The Liebert iCOM U2U network must be isolated from other network traffic. The network switch(es)
that connect Liebert iCOMs need to be dedicated to supporting only Liebert iCOM communication.
The U2U network cannot be connected to the building or IT network. If network communication is
ever lost (failed network switch, etc.), all Liebert iCOM-controlled cooling units will continue to
operate as independent units.
The Liebert iCOM can support up to 64 nodes on one network. An input/output board, large display,
and large wall-mount display are each considered one node. Of the 64 nodes that may be connected,
no more than 32 may be input/output boards (32 cooling units). The following table illustrates how a
network can be configured.
Network communication can be configured during system startup by a Liebert-trained technician. For
technical issues contact:
Emerson Technical Service
1050 Dearborn Drive
Columbus, Ohio 43235
Telephone: 1-800-LIEBSRV (1-800-543-2778)
E-Mail: [e-mail]
Table 23 Sample Liebert iCOM network configurations
Sample
Configuration
Input/Output
Boards
Large
Displays
Wall Mount
Large
Displays
Private
Switch
Required
1200No
2201Yes
3300Yes
4210Yes
5841Yes
632320Yes
732275Yes
832032Yes