Photo eye funCtion:
A tripped photo eye will prevent the gate from starting in either direction if the gate is stationary. If tripped
while in motion, the standard function is to stop the gate motion and then automatically restart again if the
photo eye is clear within ve seconds. An optional setting in the Installer Menu will cause a two second reversal
of travel.
Alignment:
Most photo eyes require careful optical alignment in order to aim the emitter beam to the receiver or reector
center. In order to avoid false triggering, it is important to carefully align system, especially with retroreective
photo eyes. The best way to assure true beam centering is with some trial testing where the emitter is shifted
to move beam left and right and up and down until the range of the invisible cone of the infrared beam is
known. Photo eyes usually provide alignment aid LEDs for this setup, but they can be hard to see. HySecurity
provides a unique feature that turns power on to photo eyes and causes buzzer to chirp when the photo eyes
enter and exit alignment. Set the menu item PE - PHOTO EYE ALIGN from a 0 to a 1. The buzzer chirps once
when the emitter and photo eye receiver are not aligned. When the emitter and receiver are aligned, the
buzzer chirps twice. If they go out of alignment again, the buzzer will chirp once. This “alignment mode” will
automatically reset to 0 the next time the Close Limit Switch is triggered or the RESET key is pressed.
Notes about retro-reflective systems:
Correct installation and alignment of a retro-reective photo eye and its reector is important for trouble free
performance. Any system operating at a range greater than 16 feet is more prone to false triggering due to
dirty optics, condensation or poor weather. If care is taken in the initial mounting and alignment of the 3-inch
reector, the chance of problems is greatly reduced. Use only through beam photo eyes for a distances greater
than 24 feet because the function of a retro-reective photo eye will be too unreliable.
Taking steps to protect the photo eye and the reector from being exposed to fog and being absolutely
certain the photo eye is perfectly aligned will greatly reduce any false triggering of the system. The ideal
mounting of a retro-reective photo eye is inside an enclosure.
The ideal reector mounting suspends it inside a 12-inch long piece of 3-inch PVC conduit. Cut the opening of
the PVC conduit at a 45-degree angle to act as a drip shield. Hold the reector against the backside of the PVC
conduit by attaching a 3-inch male connector. Do not cement the connector. This would prevent the reector
from being reached for future cleaning. To create a mounting base, attach a 3-inch aluminum ange (electric
meter hub) to the connector. This whole package can be mounted to any at surface.
Locate the reector in the center of the invisible beam of infrared light to achieve the most sensitive alignment.
The beam center is determined by the following test: while holding the reector in your hand, slowly raise
it until the beam is no longer returned and the photo eye trips. Mark this maximum height. Now lower your
hand and determine the lower limit of the infrared beam by watching for the trip point. Mark this position
as well. Repeat the same procedure for left and right at the center elevation of the beam, as determined by
the previous test. Once the four limits have been determined, either mount the reector in the center of the
area outlined or realign the eye for the position of the reector. If photo eye is realigned, be sure to perform
centering test again to verify that the reector is truly in the center.
MX3657-01 Rev. D ©2020 Entrapment Protection
hysecurity.com | 800-321-9947 53
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