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wallaceperimetersecurity.com
Phone: 866.300.1110
EXTERNAL ENTRAPMENT PROTECTION
External Entrapment Protection
Consult a photoelectric sensor manual for wiring details. Make all electrical connections to SmartDC
Controller as shown in Figure 27.
Photo Eye Installation Tips
Underwriters Laboratories requires that any non-contact sensor used as an external entrapment protection
device, must be tested to, and recognized by, the UL 325 Standard.
•
There are two common types of photoelectric sensors, thru-beam and retro-reflective, and each has
its 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 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 ft
(7.3m) because of performance and reliability issues.
Figure 27. Entrapment Protection Only Connections
Summary of Contents for FOLDSMART
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