iPECS UCM
Installation Manual Issue 1.1
46
3.3.2.2 UCM-1URMC Grounding
Before connection to AC power, the UCM-1URMC must be connected to a protective earth ground in
conformance with the appropriate IEEE recommendations. A protective earth ground is required for user
safety and to minimize EMC interference.
The UCM-1URMC grounding is the same as UCM-MGC3 grounding. It is important to be required a good
protective earth ground for proper system operation and safety. If AC power ground is used without separate
communication ground, check introduction of noise from other equipment. For wiring, see the system power
and ground cable wiring diagram given in 3.5 PSU Installation.
A 14 AWG UL type 1015 or larger copper wire is recommended as the protective earth ground connection wire.
However, check the appropriate national and local codes for proper conductor type and size. The wire should
be kept as short as possible; it is recommended that the wire be no longer than 1 meter (about 3.3 feet).
For protective ground , unscrew the FGND terminal of the terminal block on the rear side of the cabinet,
connect the ground cable and then tighten the screw. Refer to Figure 3-20.
1) Loosen the screw.
Connect the cabinet to the ground.
2) Insert the grounding wire.
3) Tighten the screw.
4) Connect the grounding wire to the ground.
Figure 3-21 UCM-1URMC Grounding
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