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ZONESENSE EN54
INSTALLATION COMMISSIONING & OPERATION
5.4
Power Management
The following is the current requirements of the panel.
Requirement
Current
Battery Charger
234mA
8 x Zones @ 25mA (in alarm)
200mA
8 x Zones @ 2mA (normal)
16mA
4 x Monitored Outputs (250mA each)
1000mA
24VDC Common for O/C outputs
170mA
Aux 24VDC
150mA
FACP electronics
20mA
In the quiescent state, current requirements are:
Requirement
Current
Battery Charger (assume max charge)
234mA
8 x Zones @ 2mA (normal)
16mA
Aux 24VDC
150mA
FACP electronics
20mA
Total
425mA
Note:
For a 2 zone panel, the zone current requirement is 4mA, making a total of 413mA,
and is 8mA or 417mA for a 4 zone panel.
In the alarm state current requirements are; (assume all 8 zones in alarm, and charger disabled)
Requirement
Current
8 x Zones @ 25mA (in alarm)
200mA
4 x Monitored Outputs (250mA each)
1000mA
24VDC Common for O/C outputs
170mA
Aux 24VDC
150mA
FACP electronics
20mA
Total
1545mA
For the 2 zone panel, 50mA is required for the zones, 500mA for the monitored outputs (2 fitted)
plus the normal operational current totals 895mA.
For the 4 zone panel, 100mA is required for the zones, and 500mA for the monitored outputs (2
fitted), plus the normal operational current totals 945mA.
5.5
Powering Up and Down Sequence
– Batteries Fitted
Given the current involv
ed on “power up” the following procedure
MUST
be followed;
Power Up
Connect the batteries
– white cable +ve red terminal to black terminal –ve ( places the
batteries in series ) red cable to red + ve terminal, black cable to
–ve black terminal.
Switch on the mains supply
Power Down
Switch off the mains supply
Remove the positive (+ve) lead from the batteries
Note:
After a “Power Down” the mains supply and batteries
MUST
be left disconnected
for at least 1 minute to allow any residual capacitive charge to be dissipated. If this process is not
followed a SYSTEM FAULT could be incorrectly indicated
