Infra red beam connections.
{"Image DocumentName": "Infra red beam connections.", "Image ImageDescription": "IR Beam TX. 12v Pos. 12v Neg. 12v Pos. 12v Neg. IR Beam RX. CM Com. N/C Trig. N/O Trig. If sentry beams are being used, connect N/O Trig to PE.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}