Emerson Liebert iCOM - Manual (Page 50)

Installing a Liebert iCOM Unit-to-Unit Network
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5.3.1 Wiring a Liebert iCOM U2U Network
Small Displays
Two cooling units, each with a small display: To network two cooling units, each with a small
display, connect a crossover CAT5 cable between the P64 connectors on each cooling unit’s Liebert
iCOM input/output board. A network switch is not needed (see Figure 24).
Figure 24 Connecting two cooling units, each with a small display using a crossover Ethernet cable
Three or more units with small displays: To network three or more cooling units, each equipped
with a small display, connect a straight-through CAT5 Ethernet cable from the P64 connector on each
cooling unit’s Liebert iCOM input/output board to a common network switch (see Figure 26).
Large Displays
A network switch is required to enable Ethernet communication on one or more cooling units with
large displays. Each cooling unit with a large display requires two straight-through Ethernet cables
from a network switch. One cable connects to port P64 on the Liebert iCOM input/output board and
the other straight-through cable connects to the female-female coupler provided with the unit. Con-
nect the red crossover cable, which is provided with the cooling unit, between the coupler and the P64
port on the back of the large display (see Figure 28).
Wall-Mount Large Display
Only large displays can be used for remotely monitoring and controlling cooling units connected on
the same network. Each wall-mount large display requires 120V input power; Liebert provides an AC
adapter wall plug. A straight-through Ethernet cable must be connected between the network switch
and the P64 port on the back of the display. This will enable control and monitoring capabilities to
any cooling unit connected to the network. See 6.0 - Mounting a Large Display on a Wall for
mounting details and Figure 31 for wall-mount dimensions.
Combining Large and Small Displays on a U2U Network
Setting up a network of cooling units equipped with large and small displays requires a network
switch. The controls are to be connected to the switch as described above.
NOTE
Only cooling units with large displays are supplied with a female-female coupler inside the
unit from the factory.