
VISTA-128B Installation Instructions
18-4
Enter devices used on
Auxiliary Power
output, calculate
standby and alarm
currents, then add to
get Auxiliary Power
current subtotal.
AUXILIARY POWER OUTPUT Total Current
Device Model # Device Current X # of Units = Standby Alarm
Aux. Power Output Subtotal
Enter devices
connected to the Alarm
Output, calculate
alarm currents, then
add to get the Alarm
Output current
subtotal.
ALARM OUTPUT Total Current
Device Model # Device Current X # of Units
Standby Alarm
XXXXXX
XXXXXX
XXXXXX
XXXXXX
XXXXXX
XXXXXX
XXXXXX
Alarm Output Subtotal XXXXXX
Enter total
calculated subtotals
of all listed outputs,
then add to get the
combined current.
COMBINED AUX. POWER, BELL AND Total Current
POLLING LOOP Standby Alarm
Auxiliary Power Output Subtotal
Alarm Output Subtotal XXXXXX
Polling Loop Subtotal
Add all subtotals
(Cannot exceed 300 ma max. standby; 750 ma max. alarm
for UL Commercial Burglary Installations)
Enter the calculated
combined current,
then add to total
PCB current.
TOTAL CONTROL PANEL LOAD Total Current
Standby Alarm
Combined aux. power, bell, and polling loop total
Total PCB current 250 ma 330 ma
Total control panel load
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