Communication Server Large System Installation and Commissioning

Installing DC power Page 121 of 456
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
The following equipment is located in the rear of each pedestal (see
Figure 43) in Large System columns.
• The PDU distributes power to the entire column.
• The field wiring terminal provides the connection point for wiring
brought into the pedestal.
• A circuit breaker is provided for each module in the column and for the
blower unit.
• All column circuit breakers will trip if a column thermal overload is
detected or a DC power low-voltage condition is sensed.
• The system monitor checks the column temperature, cooling system
status, and system voltage status and controls alarms and line transfer
states accordingly.
Figure 43
DC-power equipment in the rear of the pedestal – NT4N49AA PDU
553-8997
FLTR / PWR DIST
LRTN
BLO CB0 CB1
CB2 CB3
++
UNIT ASSY
EACH INPUT CIRCUIT MUST BE PROVIDED WITH A
LISTED FUSE OR CIRCUIT BREAKER SUITABLE FOR
BRANCH CIRCUIT PROTECTION, RATED 30A.
J6J5J3 J4
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