Controlled Products Systems Group PAT1AC - Manual (Page 38)

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Security Shunt – This a dry contact switch that is closed anytime the gate is not closed.
A proximity switch such as the type installed in a security system to activate an alarm if
the contact is broken could be wired here. If the gate is opened by an intended signal the
security shunt switch closes and prevents the alarm system from activating. If the gate
were forced open then the alarm would be activated. Security shunt can also be used to
power +12 vdc equipment. If the desired function is to have something turned on when
the gate is not closed for example, a gate open indicator light. The security shunt would
be wired as below.
The light’s ground connection can be made directly to the battery ground or negative
post. Light will come on when the gate is not closed. This can in most cases be used to
power a Photo Eye in solar applications to reduce battery drain as shown below.
Security Shunt – Used to control a Photo-Eye
If installing a photo-eye on a solar gate operator the standby current draw of the photo-
eye will drain the battery. The Patriot control board is designed to control the photo-eye
to avoid this common problem.
The Patriot control board will only apply dc power to the photo-eye when the gate is
opened.
If wired as follows.
NOTE: Do not hold the gate open when using this feature to control the photo-eye
+12 vdc power. Remember that the photo-eye will be powered up when the
gate is not closed. Gate open power is on. Contact the factory for more
information.
The photo-eye should have 4 wires that need to be identified:
1 +12 vdc power
2 Ground
3 N/O or Normally Open
4 Common or common ground
After wiring as shown below locate the DS2 dipswitches on the Patriot control board (see
page 18) and turn on the security shunt circuit enable dipswitch.
+12 vdc power (Battery Positive Post)
To light positive connection
Security shunt terminal on
Patriot control board
PHOTO-EYE
POWER + 12
Security Shunt
terminals on
Patriot control
board
POWER + 12
POWER ground
COMMON
N/O
Control Board
J2