Power Calculations Standby Battery Requirements
32 RP-1001 15150:F 05/24/2001
Appendix A Power Calculations
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The Standby Battery Current figure obtained in this section represents the amount of current that
must be supplied by the secondary power source (batteries) to sustain control panel operation for
one hour.
Note: The control panel will support the installation of one or two optional modules, including two
of the same type of module. Only one 4XLM can be included in this count.
Note:
1. Refer to the Device Compatibility Document for two-wire smoke detector standby current.
2. Must use compatible listed Power Supervision Relay.
3. The total standby current must include both the resettable (TB2 Terminals 3 & 4) and
nonresettable (TB2 Terminals 1 & 2) power. Caution must be taken to ensure that current
drawn from these outputs during alarm does not exceed maximum ratings specified (see
Appendix A.2).
Device Type
# of
Devices
Current
(amps)
Total Current
(amps)
Main Circuit Board 1 X 0.088 =
0.088
4XZM Zone
Relay Module
[ ] X 0.008 =
4XTM Transmitter
Module
[ ] X 0.011 =
• Reverse Polarity
Alarm output
[ ] X 0.005 =
• Reverse Polarity
Trouble output
[ ] X 0.005 =
4XLM/RZA-4X
Driver/Annunciator
combination
[ ]
(1 max)
X 0.019 =
4XMM Meter
Module, add 1 mA
[ ] X 0.001 =
Two-wire
Detector Heads
[ ] X
[ ]
1
=
Four-wire
Detector Heads
[ ] X
[ ]
1
=
End-of-line Relays
2
[ ] X [ ] =
Current Draw from
TB2 (nonalarm
3
)
[ ] X [ ] =
Sum Column for Standby Load = amps
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