Omron Photo Microsensors 
Dimensions and wiring.



    As of 2020, when configuring new OPCS systems, it's advised to use the PIO-100 Parallel Input/Output interface board to interface the Buckle and Viewer switches with the parallel port, instead of custom wiring them directly as shown on the current page.

    The PIO-100 allows using off-the-shelf cabling in the form of premade DB-25 Male/Male parallel port cables and RJ45 patch cables for clean, easy wiring. Refer to the schematic diagram for how to wire Buckle, Viewer, Home Sensors, etc. with the PIO-100 board.


Home sensors are highly recommended on all shutter axis (camera, projectors, fader), and are advisable but not mandatory for translation axes (North/South, East/West, Zoom).

This diagram shows how to wire an IBM PC parallel port to an Omron OR508ND home sensor. The "5 VDC Supply" must be regulated, as this voltage will be directly driving the computer's parallel port, and must be TTL compatible. Note that up to five home senors can be monitored by each parallel port (on pins 10-13 and 15). You can also use the Kuper Logic Connector to accept more sensor inputs.

The Omron OR508ND or equivalent microsensors are available from DigiKey or other electronics distributors.

Description Digikey Part# Price (*)
Omron EE-SX670 Photo Microsensor OR508ND $39.02
4 Pin connector for the above OR527ND
(Now known as EE-1001)

* Prices are 2024 from Digikey. Much lower prices can be found on ebay.
(In 1998 the EE-SX670 was $8.97, and EE-1001 was $1.90)

— Omron Home Sensor Options —


Purchasing Comments

Wiring Comments

OR508ND / EE-SX670. Dimensions are in millimeters.
4 pin connector (OR527ND / EE-1001) not shown.

For more info on home sensors, see this home sensor thread in the OPCS forum.

© Copyright 1997, Greg Ercolano. All rights reserved. To report documentation errors, send email to