ZP3 Fire Control Panel Installation, Commissioning and Maintenance Manual
Page 48
REV 11 (ISS 08/03/2010)
Figure 40: Powering optional accessory boards from a separate external power supply
Monitoring external power
When using an external power supply unit, the failure of the mains supply, or the failure of the
batteries, charging system, or fuse, can be reported to the ZP3 fire panel, as shown below. The
power supply unit must incorporate two sets of voltage-free contacts, one which changes-over
on mains failure, the other which changes-over on battery fault (disconnected battery, low or
high voltage, etc), charger failure, or fuse failure. These contacts must be connected to the ZP3
main board terminals as shown in Figure 41. When the contact changes state, the fault is
reported to the ZP3 panel, which indicates the appropriate visual and audible alarm, as well as
signalling to the Remote Manned Centre.
Figure 41: Monitoring external power
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