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Opto 22 Products

Opto 22 was founded in 1974 by engineers who designed a better solid-state relay and chose to build it in a non-corporate, flat organization. 

Opto 22 manufactures controllers, I/O, solid-state relays, and software products that link electrical, mechanical, and electronic devices to networks and computers. Opto 22 products are used for industrial automation, remote monitoring, and data acquisition energy you use. You can see and analyze detailed data and use it in building and control systems to reduce energy costs.


Opto 22's SNAP PAC System is an integrated system of hardware and software for industrial control, remote monitoring, and data acquisition applications. The SNAP PAC System makes it simpler to understand, select, buy, and apply an automation system.



SNAP I/O from Opto 22 extends your A-B PLC system with distributed Ethernet I/O where you need it, plus advanced process control features.

With ControlLogix® and CompactLogix® PLCs, use our distributed intelligence to shift I/O scanning and control to the local I/O level. Or add new, reliable, low-cost analog and digital I/O to SLC 5/05 and MicroLogix systems.

Solid State Relays and Dimmers

Opto 22 offers a complete line of solid state relays, from the rugged 120/240-volt AC Power Series to the small-footprint MP Series, designed for mounting on printed circuit boards.

All Opto 22 relays have 4,000 volts of optical isolation between the field side and the control side, and all are UL and CSA recognized.

Every Opto 22 solid state relay is subjected to full load test and six times the rated current surge both before and after encapsulation. We don't do statistical testing.

Opto EMU System

An OptoEMU Sensor Energy Monitoring Unit quickly and easily monitors the energy you use. You can see and analyze detailed data and use it in building and control systems to reduce energy costs.

You can even gain revenue by taking advantage of demand response programs from your local utility.

PC-Based I/O

Manage anything, anywhere, from your PC with guaranteed-for-life Opto 22 industrial I/O and distributed intelligence.

Industrially hardened I/O meets demanding specifications and provides local processing.

Which parts work together? See the PC-Based I/O Overview.

Use our driver toolkits to communicate between distributed I/O and your custom program. New! SoftPAC, an easy-to-program PC-based controller.



Develops your HMI entirely within a web browser. Views it on any modern PC, smartphone, tablet or even HDTV, Securely accesses it from your network over the internet, builds screeens with a library of touchscreen ready gadgets.

Uses latest web standards like HTML5, CSS3, SVG without any plugins, eliminates programming and server commissioning, deploys changes automatically. 

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