Larger batteries or external backup power supply systems may be supplied and fitted according to
requirements, details of these are beyond the scope of this manual. See the Specification Sheet
supplied with the system for more information.
NOTE Where external DC supplies are used, they should be connected via the DC input connection
NOT the battery input.
4.7.5 Power Failure
Under total power failure all system configuration data is protected by non-volatile Ferroelectric RAM
(FRAM) in the Node Controller Module. Logged data is not protected and is lost.
The power status is displayed by the Power Healthy LED on the Display Module, where fitted.
Detectors have a warm-up time when power is initially connected or reconnected after a power loss.
During this period, detector signals may not be reliable.
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