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Supervised Alarm / Relay / Power Expansion Unit
MAINTENANCE
Power Supply Replacement
The following procedure applies after determining that the Ex-
pansion Unit power supply (P/N MX1106) needs replacing.
WARNING
Verify that the AC source voltage is switched off
at the breaker panel before proceeding with
power supply replacement.
1. Open the Expansion Unit cabinet and locate the 12VDC
power supply in the lower left corner of the cabinet. Pull
the insulating cover out of the way.
2. Disconnect the lower Molex connector from the power
supply (one black and one white).
3. Disconnect the upper 6-pin Molex connector from the
power supply.
4. Remove the four 6-32 screws securing the power supply
bracket to the Expansion Unit cabinet.
5. Remove the power supply from the Expansion Unit cabi-
net.
6. Install the new power supply in the reverse order of the
removal.
Backup Battery Replacement
WARNING
Verify that the AC source voltage is switched off
at the breaker panel before proceeding with
backup battery replacement.
1. Open the Expansion Unit cabinet and locate the backup
battery (P/N CI-HE0042) secured to the lower right of the
cabinet.
2. Disconnect the RED lead from the POSITIVE terminal of
the battery.
3. Disconnect the BLACK lead from the NEGATIVE termi-
nal of the battery.
4. Remove the three screws securing the battery bracket.
5. Remove the old battery.
6. Install the new battery in the reverse order of the removal.
7. Replace the battery bracket. Replace the three screws and
tighten.
8. Replace the Backup Battery at least once every five years.
NOTE:
Because of the Low Battery Voltage Disconnect fea-
ture, the Expansion Unit will not start to operate until Mains
(AC) power is connected.
MAINTENANCE
