Section 3 - Installing the Control
3-27
Determining the Control’s Power Supply Load
1. In Worksheet 1, enter devices used on the polling
loop. Calculate total current draw on the polling
loop.
Worksheet 1: Total Polling Loop Current Draw
Polling Loop Device Current # of Units Total
Polling Loop Subtotal
(terminals 28 & 29 – 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. Note that the total number of points
connected to the panel cannot exceed 119.
2. In Worksheet 2, enter devices used on Auxiliary
Power 1. Calculate standby and alarm currents,
then add to get Auxiliary Power 1 current subtotal.
Worksheet 2: Auxiliary Power 1 Current Load
Total Current
Device
Model #
Device Current X
# of Units
Standby Alarm
Auxiliary Power 1 Subtotal
(terminals 10 & 11)
1A max.
1.7A max.
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