Service Manual

GSM-205-323
Hold-up battery module
31st Oct 01
Technical Description: Horizon macro indoor
68P02902W07-B
CONTROLLED INTRODUCTION
Tech. 4–9
Alarms
Alarms are generated by the open contacts of de-energized relays within the
hold-up battery module, (during normal operation the relays are energized and
the contacts closed). The contacts are rated for 1 A at 30 V. The alarms are
then passed to the Horizon
macro alarm board, through the CBIA backplane, for
onward transmission to the OMC-R. These alarms are equivalent to the PSM
alarms.
The alarm signals generated are:
 Output fail.
This alarm is triggered if:
– The enable pin is not correctly plugged into the backplane.
– The battery charger fails.
– The front panel enable switch is off.
– The batteries fail.
NOTE
If a battery failure occurs, the batteries may have reached
the end of life. The hold-up battery module is disabled and
must be returned to Motorola for repair.
 Input fail.
This alarm is triggered if the external ac supply voltage drops below:
– 88 volts (110 V ac nominal systems).
– 150 volts (230 V ac nominal systems).
 Over temperature.
This alarm is triggered if the hold-up battery module temperature exceeds
50
C.
Signals
The following signals interface with the Horizon macro backplane:
 Enable.
The output of the hold-up battery module is inhibited unless the ENABLE
signal pin is connected to the output return pin through the Horizon
macro
backplane.
 Hold-up module ID.
The hold-up module provides a five bit TTL signal to the OMC-R that
allows identification of the hold-up module. This signal is available when
ac is present and during battery discharge and identifies to the OMC-R the
that a battery hold-up module is fitted.