• Kit includes transmitter, receiver, integrated protective hoods and removable lens sunshield
  • Thru beam configuration
  • UL325 compliant
  • Four (4) monitoring interfaces
  • 115 ft. operating range
  • Easy installation and set-up
  • Compatible with many operators


The IRB-MON2 is a monitored, weather-proof, thru beam infrared photoeye solution providing entrapment protection for doors, gates and barriers. The IRB-MON2 Safety Photo Beam is UL325 compliant and housed in an IP65 rated enclosure suitable for indoor and outdoor use.

This universal UL325 thru beam photoeye can be used with a wide variety of monitored operators. Additionally, the IRB-MON2 photoeye is compatible with most non-monitored legacy products. Its robust construction minimizes fogging and false triggering to provide easy alignment.


  • Enhanced version of the original IRB-MON
  • Advanced features in a compact design
  • Integrated sensor hood for element protection
  • Removable terminal block for easy wiring
  • IRB-MON2 can be used in non-monitored applications using standard NC/NO contacts
  • Various UL325 Monitoring Methods for adaptability
  • 0.83″ (21.3 mm) Conduit Hole – large enough for 1/2 Inch NPT
  • 115 ft. Operating Range
  • Detachable Screw Terminals
  • IRB-MON2 can be used in non-monitored applications using standard NC/NO contacts

The IRB-MON2 universal UL325 thru beam photoeye has 4 monitoring interfaces:

  1. Normally closed
  2. Two-wire pulsed (2 freq)
  3. Two-wire pulsed (3 freq)
  4. 10k resistive termination


Operating Range 5 to 115 ft (35 m)
Power 6-35 VDC, 12-24 VAC
Current (NC and 10K Monitoring Methods) 35 mA DC (when aligned and relay activated)
Current (Pulse Monitoring Methods) 15 mA
Connections “Removable” screw terminal for easy wiring
Supported Monitoring Methods 10K, 2-wire pulse, Normally Closed (power cycle)
Relay Output Configuration Form C contacts (NO, COM, NC)
Response Time <300 ms (for use in NC or 10K monitoring)
Operating Temperature -40° to 170°F (-40° to 77°C)
Dimensions (L x W x H) 3.6” (91 mm) x 2.9” (74 mm) x 2.9” (74 mm)
Conduit Hole Size (bottom of the housing) 0.83″ (21.3 mm) – large enough for 1/2 Inch NPT

Spec Sheet


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