Controlled Products Systems Group 222X383 - Manual (Page 42)

Installation and Maintenance Manual
34
D0119, Rev. F
Installing Photoelectric (Non-contact) Sensors
General Information:
Follow the guidelines in the Entrapment Protection Schematic to plan the most appropriate mounting positions
for the photo-eye sensors to be installed. If there are no other secondary external entrapment protection
sensors (typically an edge sensor), at least two photoelectric sensors are required to serve to reverse the gate
in each direction of travel. The Smart Touch Controller has two photoelectric sensor inputs (Photo eye open
and Photo eye close).
There are two common types of photoelectric sensors, thru beam and retro-reflective, each has some
advantages. A thru beam sensor is generally more powerful and able to function reliably with dirty optics and in
poor weather. A retro-reflective sensor has the convenience of not requiring the installation and electrical wiring
of the remote emitter required in a thru beam system, but is generally more problematic in poor weather. Avoid
use of a retro-reflective device to span a distance greater than 24 feet in an outdoor environment because
performance will probably be unsatisfactory.
Compatibility:
A requirement of the UL 325 standard is that a photoelectric sensor be laboratory tested and “recognized” under
UL 325. In order to be compatible with a HySecurity operator, a photo eye must be rated to function from 24
Volts DC source power.
Installation:
Mount the photo eyes approximately 15” to 30” above the ground and as close to the gate as possible. Unless
there are also gate edges for entrapment protection, a minimum of two photo eyes will be required to function
for both the open and closing directions of travel. Mount the receivers on the left and right sides of the gate
operator and the emitters just beyond the travel of the gate in both the full open and full closed positions of
travel. In some situations, an additional photo eye should be installed on the public side of the gate. The
installation locations described above are intended for pedestrian detection
. If photo eyes are also to be
used for vehicular detection, consider, in addition to the low elevation photo eye for cars, installing another
photo eye at a height of about 55” to detect semi-trucks.
Configuration:
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.
Connection:
Three wires to the receiver and two wires to the emitter are all that is required.
a. The +24 Volt source power is obtained at one of the three spade terminals on the power supply
board.
b. The –24 Volt source power is obtained from spade terminals on our terminals #14 or #15, labeled
(Photo Eye Power) on the Smart Touch Controller board. (See NOTE)
Note: The –24 Volt Photo Eye Power also supplies the photo eye output Common.
c. The photo eye NO or NC output connects to the Smart Touch Controller board at terminal #19 if
the photo eye spans the road, or at terminal #17 if the photo eye spans the gate’s open storage
area. (See NOTE)
NOTE: If photo eyes are to be used for vehicle detection and logically function the same as a vehicle detector,
wire -24 Volt to one of the Common terminals of the power supply board and wire the NO output contact
to the appropriate vehicle detector input: Free exit (terminal #8), inside obstruction (terminal #10), outside
obstruction (terminal #11) and shadow/reset (terminal #12).