ECI XDM-300, Installation And Maintenance Manual

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XDM-300 Installation and
Maintenance Manual Before You Start
417006-2311-0H3-A00 ECI Telecom Ltd. Proprietary 2-21
Grounding Requirements
All the equipment, including XDM-300 shelves, ancillary units, and equipment
from other vendors, must be properly grounded at all times. Good equipment
grounding is necessary to protect personnel and equipment, minimize noise,
and allow the discharge of accumulated static charges to earth.
Checking site grounding wiring
Proper operation of XDM equipment requires that the positive supply line be
connected to the common ground (CGND) of the site at the power source, in
accordance with ETS300132-2.
The following figure shows a simplified diagram of the connections to CGND
suitable for the installation of XDM shelves.
Power
supply
Phase
Neutral
Ground
AC IN
AC power
cable
~
0
+
Battery
bank
+ –
–
CGND
RAP
XDM
equipment
CGND CGND
DC OUT
Grounded
chassis
DC power
cable
Equipment rack
Figure 2-5: Grounding connections at typical site
Correct grounding is critical, and therefore it is necessary to check the
connections before applying power to the equipment installed in the rack.
When two independent power sources are used, the test must be performed
separately for each source.
If a problem is detected during the test, the site wiring must be repaired before
continuing.
The check is made with a standard DVM, using the following procedure.