Service Manual

GSM-204-523
Replacing the power distribution box
31st Oct 01
Maint. 4–4
Maintenance Information: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W04-A
Fitting a
replacement
power
distribution box
To fit a new power distribution box:
1. Configure the new power distribution box to supply one or two BTS
cabinets as appropriate, see
Installation and Configuration:
(GSM-204-423)
Chapter 5 Configuring battery backup in this manual.
2. Connect the power cables for the heater mats and the fan to the external
alarm interface board.
3. Connect the alarm cables for the door microswitch to the external alarm
interface board.
4. Mount the new power distribution box onto the underside of the lid and
secure in position using the M4 nuts.
5. Connect the longer pair of battery cables from the power distribution box
to their terminals on battery bank 1, row 2. The blue cable connects to
negative and the black cable connects to positive.
6. Install the bank 2, row 1 battery tray, followed by the bank 2, row 2 battery
tray and then remake the terminal connections between the two rows
(refer to
Installation and Configuration: (GSM-204-423) Installing
batteries in the auxiliary equipment housing if necessary. Connect the
remaining pair of battery cables to the positive and negative terminals on
the top bank of batteries.
7. Connect the alarm signal cables to PL1, PL2 and PL3 on the front of the
power distribution box.
8. Connect the dc power cable from the main cabinet to the rear pair of
Anderson connectors on the power distribution box. If used, connect the
extension cables from another cabinet to the front pair of Anderson
connectors.
9. Switch on the circuit breakers on the front of the power distribution box
and then close the lid and the cabinet door.
10. Switch on the EXT BATT circuit breaker on the dc circuit breaker panel in
the main cabinet.
The procedure for installing a new power distribution box is now complete.