Vertiv Liebert CRV - 9.2 U2 U Network Installation

9.2 U2U Network Installation
9.2.1 Required network equipment
Ethernet cable CAT5 or greater.
• Maximum cable length is 328ft (100m).
• An Ethernet repeater is required for cable lengths greaterthan328ft(100m).
Network switch
• IEEE 802.3; IEEE 802.3u
• 10/100Mbps speed
• Multiple 10/100 RJ-45 ports, one shared.
• RJ-45 up-link port
NOTE: Up to 32 cooling units may be connected in a U2U network.
9.2.2 Plan wiring runs
When planning the layout of the conditioned space, consider the following:
• Good wiring practices.
• An Ethernet repeater is required for cable lengths greaterthan328ft(100m).
• A private network that only connects and manages the cooling units is required.
• Keep control and communication cables away from power cables to prevent electromagnetic
interference.
• Keep cables away from noise-introducing devices such as machines, fluorescent lights and
electronics.
• Do not bend cables to less than 4 times the diameter of the diameter of the cable.
• Do not deform cables when hanging or securing in bundles.
• Do not exceed 25lb (11kg) of tension when pulling cables to avoid stretching.
• Do not damage cables when securing them. Use only approve hangers, such as telephone
wire/RG-6 coaxial-wire hangers.
9.2.3 U2U Wiring connection
NOTICE
Cooling units are factory-wired for stand-alone operation. Do not connect the U2U network
cabling before setting the U2U network configuration/groups. Network communication
conflicts and unreliable display readings will result.
Before you begin, refer to Preparing for U2U Group Set-up, andConfiguring U2U Network
Settings, in the “Liebert® iCOM™ User Manual,” included with your system documentation.
– or –
Contact Vertiv™ Technical Support at 1-800-543-2778 or https://www.vertivco.com/en-
us/support/.
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