Controlled Products Systems Group 222EX43 - Manual (Page 53)

35 © 2010 Installation and Reference Manual D0119 Rev. J
Section 4
—Installing Photoelectric (Non-contact) Sensors
General Information:
To plan the most appropriate mounting positions for the photoelectric sensors, review the Entrapment Protection Device
illustration on page 4. If secondary external entrapment protection sensors (typically an edge sensor) are NOT installed, at
least two photoelectric sensors are required. The purpose of the photoelectric sensors is 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).
Two common types of photoelectric sensors exist:

Thru beam - A thru beam sensor is generally more powerful and able to function reliably with dirty optics and in
poor weather.

Retro-reflective - 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.
NOTE: Avoid use of a retro-reflective device to span a distance greater than 24 feet (7.3 meters) 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 24VDC source power.
Installation:
Mount the photo eyes approximately 15 to 30 inches (38 to 76cm) above the ground and as close to the gate as possible.
A minimum of two photo eyes are required for both the opening and closing directions of travel unless gate edges for
entrapment protection exist.
NOTE: The installation locations described above are intended for pedestrian detection.
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 close positions of travel. In some situations, an additional photo eye should be installed on the
public side of the gate. If photo eyes are also being used for vehicular detection, consider, installing the low elevation
photo eye for cars and another photo eye at a height of about 55 inches (140cm) 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:
Four wires to the emitter and two wires to the receiver 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
Common Power) on the Smart Touch Controller board.
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.