Wallace Perimeter Security SPEEDGATE - Installation Instructions for Optional Vehicle Detectors

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INSTALLATION INSTRUCTIONS FOR OPTIONAL VEHICLE DETECTORS
Installaon Instrucons for Oponal Vehicle Detectors
The vehicle detector passes a small current ow through the in-ground laid “loop” which then becomes
an inducve coil. When a vehicle passes over the loop the detector senses the resultant drop in the
inductance, and this in turn actuates its output relay.
The best way to ensure a quality installaon is to employ a professional installer experienced with
vehicle detecon ground-loop systems.
Figure 18. Loop Layout
Vehicle detecon ground loop systems,
while not required by UL Standards,
are HIGHLY RECOMMENDED for
Automac Exit and Obstrucon
Sensing Only.
For SpeedGates using vehicle
detectors, they are only to
be used for vehicular trac
and the loops should not be
less than 60 feet square (5.6
square meters).