118
wallaceperimetersecurity.com
Phone: 866.300.1110
OPERATION NOTES
Operation Notes
•
A photo eye trip does not reverse gate.
•
The SmartDC Controller software is factory set to stop upon photo eye trip.
•
Software is configurable to stop and reverse two seconds upon photo eye trip.
•
If the photo eye is cleared within five seconds, the gate will proceed in the direction of travel.
There are two common types of photoelectric sensors, thru-beam and retro-reflective, and each has its
advantages. Refer to Photo Eye Installation Tips.
•
A thru-beam sensor is generally more powerful and able to function reliably with dirty optics and
in poor weather.
•
A retro-reflective sensor does not require the installation and extra wiring of a separate emitter
and receiver as is required in a thru-beam system, but retro-reflective eyes are generally more
problematic in poor weather. Avoid using retro-reflective devices across outdoor distances greater
than 24 feet (7.3m) because of performance and reliability issues.
Mount thru-beam type photo eyes approximately 15" to 30" (38cm to 76cm) above the ground and as
close to the gate as possible. A minimum of two photo eyes are required, one photo eye to guard the
open direction and the other for the close direction of travel, unless gate edges for entrapment protection
are installed. Mount the emitters and the receivers just beyond the travel of the gate in both the full open
and full closed positions of travel. The installation locations described above are intended for pedestrian
detection. If photo eyes are to be used for vehicular detection, install a low elevation photo eye for cars
and another photo eye at a height of about 55" (140cm) to detect semi-trucks.
As stated in Photo Eye Installation Tips, if the photo eye has an internal switch for setting Light Operate vs.
Dark Operate, select Light Operate. If the photo eye has a relay output and has both NO and NC terminals,
some experimentation may be required to determine the proper connection. This is because, in the Light
Operate mode, the output relay is normally energized and releases when the beam is blocked. Some
manufacturers label an output as NO, when it is actually an NC contact. If the photo eye has a solid-state
output you must choose a sinking type connection.
If photo eyes are to be used for
vehicle detection and logically
function the same as a vehicle
detector, connect the common wires
to the COM terminals on the left side
of the board and wire the NO output
contact to the appropriate vehicle
detector input: EXIT LOOP, IN OBS
LOOP, and OUT OBS LOOP.
Summary of Contents for FOLDSMART
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