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WI808B 8/98
Use the procedure given below to determine the required standby battery capacity in Ampere-Hours (AH). NOTE: It is not
totally accurate to merely multiply the combined standby current (in amperes) by the standby time (in hours) to obtain the
battery capacity (in ampere-hours), since other factors (control-panel charging capabilities, temperature, battery condition,
etc.) affect battery operation. The following calculations will yield the theoretical minimum required capacity.
1. STANDBY CURRENT
DEVICE
QTY
GEM-P1632
1
X
GM-EZM816
X
GEM-RP1CAe2
X
(1)
X
GEM-RP1CAe2
GEM-RP2ASe2
X
(2)
X
GEM-RP2ASe2
(3)
X
RM3008
X
X
TOTAL STANDBY CURRENT
(1)
Backlighting disabled (cut Jumpers W1, W2 & W3).
(2)
Backlighting disabled (cut Jumpers A, B & C).
(3)
Add 0.010A for each energized relay.
(4)
Standby Time in Hours.
2. ALARM CURRENT
DEVICE
QTY
TOTAL STANDBY CURRENT
(from Box 1, above)
(1)
GEM-P1632
BELLS
STROBES
HORNS / STROBES
TOTAL ALARM CURRENT
(1)
Alarm current drawn in alarm.
(2)
Alarm Time in Hours. Example: For a 15 minute alarm timeout,
Alarm Time = 15/60 = 0.25.
MINIMUM REQUIRED BATTERY CAPACITY = BOX 2 + BOX 3
NAPCO Security Systems
STANDBY CURRENT (Amps)
EACH
0.120
=
0.050
=
0.100
=
0.035
=
0.065
=
0.020
=
0.040
=
=
=
(Box 1)
ALARM CURRENT (Amps)
EACH
X
0.100
=
X
=
X
=
X
=
X
=
X
=
TOTAL
X
Amps
(Standby Time)
TOTAL
0.100
X
Amps
(Alarm Time)
=
Amps
(4)
(Box 2)
=
Amps
(2)
(Box 3)
GEM-P1632 Installation Instructions
Page 27
AH.
AH.
AH.
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