Honeywell VC4 User Manual page 180

4. The back panel of the VC4™ system has been designed to allow low voltage wiring to exit
from the unit from the right side (as you view the back panel) while higher voltage and AC
wiring exits on the left. Keeping this wiring protocol reduces the risk of electrical noise
causing interference to your alarm circuit. The remote inputs are located at the lower right
of the relay panel as shown below.
Using an External Power Supply
The recommended method of wiring the remote alarm reset circuit is using an external (user-
supplied) 24 VDC power supply. Using the external power supply provides a very efficient
method of powering the alarm reset circuit, and reduces the risk of electrical interference within
the VC4™ system.
A schematic of the circuit using External Power Supply.
VC4™ 180 User Manual