How to Connect C18 Series Partition Sensors to a UHCI

Question

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

• SGM1639 (receiver)
• SGM1640 (emitter)

Please note that the labels of the UHCI may vary. Please refer to this article for more information: Unison Heritage Contact Interface (UHCI) Wall Mount Label Changes

Steps

1. Locate the Common terminal (#2) on the Switch In phoenix connector and land a spare piece of 20AWG wire     

1. Connect the wire in terminal #2 on the phoenix connector to a spare terminal on the terminal block.
2. Connect the brown wire from both the receiver and the emitter to +24V on the terminal block.
3. Connect the blue from both the receiver and the emitter to our newly created common (from #2 on the phoenix connector)
4. Connect black wire (N.O.) or white wire (N.C.) from the receiver to a UHCI contact input on the terminal block.

Note

• 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.
  
• When the receiver detects the emitter, the relay output will be in the "normal" state. So: