REFERENCE
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.
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 five
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 center
of the receiver or reflector. In order to avoid
false triggering, it is important to carefully align
the system, especially with retroreflective photo
eyes. The best way to assure true centering of the
beam is with some trial testing where the emitter
is shifted to move the 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 LED's for this setup, but
they can be hard to see. HySecurity has provided
a unique feature that turns power on to the photo
eyes and causes the buzzer to chirp when the
photo eyes enter and exit alignment. See "Table
11. Smart DC Controller - User Menu Functions"
on page 63 to enable this feature. 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-
reflective photo eye and its reflector 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 reflector,
the chance of problems is greatly reduced.
Taking steps to protect the photo eye and the
reflector 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-
reflective photo eye is inside an enclosure.
The ideal reflector 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 reflector against
the backside of the PVC conduit by attaching
a 3-inch male connector. Do not cement the
connector. This would prevent the reflector from
being reached for future cleaning. To create a
mounting base, attach a 3-inch aluminum flange
(electric meter hub) to the connector. This whole
package can be mounted to any flat surface.
Locate the reflector 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 reflector
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 reflector in
the center of the area outlined or realign the eye
for the position of the reflector. If photo eye is
realigned, be sure to perform centering test again
to verify that the reflector is truly in the center.
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SWINGSMART DC PROGRAMMING AND OPERATIONS MANUAL
MX3640-01 REV. D ©2018
