Communication Server Large System Installation and Commissioning

Page 374 of 456 Adding a module to a column
NN43021-310 Standard 02.01 December 2007
Adding a module to the top of a column
In a DC-powered system, power to the column can remain on during this
procedure.
If conduit or other cabling runs through the top cap, you must tag and
disconnect the cables, pull them out of the way, and reroute them after the
new module and the top cap are positioned.
Procedure 72
Adding a module to the top of the column
1 Disconnect and remove the NT8D22 System Monitor for the column in the
rear of the pedestal (do not turn off the blower unit in the front of the
pedestals):
a. If the column houses the master system monitor, load LD 37 and
software disable the associated SDI port:
LD 37
DIS TTY x disable the device associated with the port
b. Disconnect the RJ11 cable to J3, then the cable to J6, then pull the
system monitor out of the slot.
2 Turn off power as necessary:
• With AC power, set the main circuit breaker for the column to OFF
(down) in the rear of the pedestal.
• With DC power, set the switch on the module power supply and the
circuit breaker in the rear of the pedestal to OFF (down) for the
module being added.
DANGER OF ELECTRIC SHOCK
Due to hazardous voltage in AC-powered systems,
power to the entire column must be shut down. This
shuts down all functions in the column.