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Electronic Theatre Controls Inc

How to Connect C18 Series Partition Sensors to a UHCI


How do I wire C18 series partition sensors to my UHCI?

  • SGM1639 (receiver)
  • SGM1640 (emitter)


  1. Connect the brown wire from both the receiver and the emitter to +24V.
  2. Connect the blue wire from both the receiver and the emitter to common.
  3. Connect the black wire (N.O.) or white wire (N.C.) from the receiver to a UHCI contact input (pins 3-10 on J4). 


C18 wiring 2.PNGC18 wiring.PNGC18 LED.PNG


  • The yellow LED on the receiver will illuminate when it is in line of sight of the emitter and will turn off when the beam is broken.