Emerson 3000/ITR User Manual

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 15).

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.

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.
To connect multiple units in a U2U network, the Network IP address, U2U Group Number and the 

U2U Address must be changed. The Network IP and the U2U Address must be unique on the net-

work.

NOTE
Only cooling units with large displays are supplied with a female-female coupler inside the