Polling Loop Current Drain Worksheet; Auxiliary Device Current Drain Worksheet; Calculating The Battery Size Needed - ADEMCO VISTA-120 Installation And Setup Manual

Calculating the
Battery Size Needed

Polling Loop Current Drain Worksheet

RPM DEVICE
4194WH Contact
4191SN Contact
4193SN
4293SN
4939SN-WH Contact
4959SN O/H Door Contact
4192SD Photo Smoke Detector
4192SDT Smoke w/Heat
4192CP Ion Smoke Detector
4275EX Dual PIR
4278EX/4278EX-SN Quad PIR
4190 2-Zone RPM
4208U 8-Zone RPM
4208UXM MK3 8-Zone RPM
7500 Glass Break
9500 Glass Break
998MX PIR
** If the total current drain exceeds 128 mA, a 4297 Loop Extender module must be used. This module is
powered by the control's auxiliary power output and provides a separate polling loop output which can
support an additional 128mA.

Auxiliary Device Current Drain Worksheet

DEVICE
6139 Keypad
675 Ground Start Module
Built-in Polling Loop
4281 RF Receiver
5881/5882 RF Receiver
5882EU RF Transceiver
4297 Poll Loop Extender
4204 Relay Module
* If using wired devices such as PIRs, refer to the specifications for that particular unit's current drain.
–60–
Use the following formula to determine the battery size needed:
[Total Current Drain (Amps)] X [Number of Hours Standby Needed] = [Battery Ampere Hours].
Example: If the total current drain is 550mA (.55 Amps), and 24 Hr. standby is
needed: .55 X 24 = 13.2 Ampere/Hour battery. In this example, two 7 Amp/Hr
batteries connected in parallel must be used.
CURRENT
1 mA
1mA
1.5mA
1mA
1mA
1mA
0.4 mA
0.4 mA
0.4 mA
1 mA
1 mA
1 mA (LOW)
2 mA (HIGH)
29 mA
25mA
1.5 mA
1.5 mA
1 mA
TOTAL **
CURRENT
100mA
50 mA
(total poll loop worksht)
35mA
50mA
60mA
50 mA
15mA standby
40mA per active relay
# UNITS
# UNITS
TOTAL
CURRENT
TOTAL
CURRENT
TOTAL (750mA max)