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COMSPHERE –48 Vdc Central Office Power Unit
2-4 May 1998 3000-A2-GB41-40
CO Power Unit Installation
The CO Power Unit is installed at the bottom of the
carrier. You will need a large, flat-blade screwdriver to
install the CO Power Unit and a medium, flat-blade
screwdriver to set the option straps.
NOTE
If you plan to use two power
modules in your CO Power Unit,
you must install the second
power module before proceeding
to Step 1. (See the
Installing the
Optional Second Power Module
section.)
The following is an overview of the CO Power Unit
installation procedure:
" Procedure
1. Set the option straps on the CO Power Unit’s
backplane to the desired mode of operation. (See
the Setting the Option Straps section.)
If your CO Power Unit has a single power
module, you do not need to set the option straps.
The option straps are factory set for the Basic
mode of operation. However, you should compare
the option strap setting on backplane to the strap
settings listed in Table 2-2 in the Setting the
Option Straps section to ensure correct settings.
2. Install the CO Power Unit into the carrier. (See the
Installing the CO Power Unit section.)
3. Provide power to the CO Power Unit. (See the
Providing Power to a CO Power Unit section.)
4. Install the Shared Diagnostic Control Panel
(SDCP) on the carrier in which you installed the
CO Power Unit, if desired. (See the Installing an
SDCP section.)
5. Connect the alarm contacts for the CO Power Unit
to a CO alarm system and/or a Modular 3611
DSU, if desired. (See the Connecting the Alarm
Contacts to a CO Alarm System section or the
Connecting the Alarm Contacts to a 6800 Series
NMS Via a Modular 3611 DSU section.)
Steps 4 and 5 are optional.
Installing the Optional Second Power
Module
You can order a second power module for your CO
Power Unit. This additional power module allows you to
choose between two modes of operation: Redundant or
Independent. You must install the optional second power
module into the CO power tray before installing the CO
Power Unit into the carrier.
To install the optional second power module:
" Procedure
1. Remove the coverplate by loosening the two
captive screws on the bottom of the coverplate.
2. Place the second power module in the card guides
on the right side of the CO power tray (as viewed
from the front of the tray) and then slide power
module to the rear of tray. See Figure 2-1.
3. Tighten the two captive screws on the bottom of
the power module’s faceplate.