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VISTA-120 Installation and Setup Guide
1.
In Table 1, enter devices used on the polling loop.
Calculate total current drain on the polling loop.
Table 1: Total Polling Loop Current Drain
Polling Loop Device
Polling Loop Subtotal
(terminals 24 & 25 – 128mA) *
* The total current cannot exceed 128mA. If total load exceeds
128mA, then a 4297 Loop Extender Module can be used. This
module is powered from the panel's auxiliary power, and
provides a separate polling loop output, which can support an
additional 128mA load.
Installing The Back-Up Battery
1.
Place the 12-volt back-up battery in the control
cabinet.
2.
Connect the Red battery wire to the positive (+)
battery terminal on the control board.
3-26
Current
# of Units
Total
2.
In Table 2, enter devices used on Auxiliary Power.
Calculate standby and alarm currents, then add to
get Auxiliary Power current subtotal.
Table 2: Auxiliary Power Current Load
Device
Device Current X
Model #
# of Units
Auxiliary Power Subtotal
(terminals 6 & 7 – 750mA max.)
3.
In Table 3, enter the total calculated subtotals from
Tables 1 and 2, then add to get the total current.
Table 3: Total VISTA-120 Standby Current Drain
Polling Loop Subtotal (see Table 1)
Aux. Power Subtotal (see Table 2)
Total Current Drain
Use the following formula to calculate the battery size:
[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: 0.55 X 24 = 13.2
Ampere/Hour battery. In this example, two 7 Amp/Hr
batteries connected in parallel must be used.
3.
Connect the Black wire to the negative (–) battery
terminal on the control board.
NOTE: If two batteries are required, use the dual
battery harness (supplied).
Total Current
Standby
Alarm
Total Standby
Current
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