Hover over image to zoom in


Availability: Obsolete
OBSOLETE Opto 22 Classic Controller for FactoryFloor systems

Production Specification

IMPORTANT NOTE: Due to difficulty obtaining parts, this controller is obsolete and no longer available.

For new development, system expansion, or modernization, we recommend using the SNAP-PAC-S2 standalone controller and the PAC Project Professional software suite. SNAP PAC S-series controllers with PAC Project Pro offer a migration path for legacy mistic systems.

For migration information, see the FactoryFloor to PAC Project Migration Technical Note.
IMPORTANT NOTE: Due to difficulty obtaining parts, this controller is obsolete and no longer available.


Motorola 68020 32-bit microprocessor


Motorola 68882 floating point math coprocessor

CPU Clock Frequency

16.67 MHz


512 KB (expandable to 1 MB)


512 KB (expandable to 4 MB), with battery backup

Watchdog timer

Standard, hardware

Real-time Clock

Clock/calendar, Epson 62421A, with battery backup

Front panel display

4 line x 20 character backlight LCD

Front panel keyboard

25-button keypad


Two full-duplex, RS-422/485 serial ports
Two full-duplex combined RS-232 or RS-422/485 serial ports
One ARCNET port
Local bus port

RAM/clock battery

3.6 V lithium, nonrechargeable

Battery life

Two years under normal operating conditions

Power requirements

5.0 - 5.2 VDC @ 2.0 A

Operating temperature

0 °C to 60 °C
0 °C to 50 °C for LCD display

Storage temperature

- 25 °C to 85 °C


5 % to 95 % relative humidity


FactoryFloor (OptoControl, OptoDisplay, and OptoServer)
Classic Software (Cyrano, Mistic MMI, MDS)


RAM & EPROM Memory Expansion Options Data Sheet

****  These parts are obsolete and no longer available. ****

Tables and other information for selecting RAM and EPROM expansion options for controllers.

High Performance, Real-Time Mistic 200 Controller

The G4LC32 Controller is a high-performance real-time industrial microcomputer designed to work within the Opto 22 family of rugged and compact controllers and I/O units.

OptoControl-based Controller Firmware README

This README file lists revision changes made to the firmware used in the following Opto 22 controllers that run OptoControl strategies: G4LC32, G4LC32SX, M4, M4IO, M4RTU, SNAP-LCSX, SNAP-LCSX-PLUS, and SNAP-LCM4.

Mistic Installation Guide

Guide for configuring and installing the Mistic 200 System.

Mistic 200 Family Data Book

*** The Mistic family of controllers is OBSOLETE and no longer available. ***
Mistic 200 Family Data Book

G4LC32 Model 200 Processor Users Guide

This manual contains information about configuration, installation, and communications connections to the G4LC32 controller.

Case Study: Bureau of Reclamation

The U.S. Bureau of Reclamation constructs dams, power plants, and canals, and delivers water to more than 31 million Americans. The Bureau also operates the Leadville Mine Drainage Tunnel (LMDT), which drains off and treats water from the local mining district so it can be safely discharged into the Arkansas River.

At the LMDT, the Opto 22 SNAP PAC System is used to monitor water levels, remove metals, adjust the water’s pH, reduce water turbidity, and otherwise treat the water before releasing it—cleaner even than everyday drinking water. More than 2500 I/O points are monitored, controlled, and alarmed.

CE Declaration: EMC

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

BETA firmware for OptoControl-based controllers

This download contains BETA firmware for Opto 22 controllers running OptoControl strategies.

Beta Version Disclaimer:

OptoControl is a legacy product, which is no longer getting new features and no longer going through official release cycles. Beta versions of the firmware are made available as-is for those who need the related bug fixes.

In general, beta versions will include bug fixes since the last official release, without adding new features. This usually enhances product stability without introducing unwanted side effects. Beta versions for legacy products have been through basic testing only, and will not be formally tested.

Ultimately, the choice will be up to the user as to whether the benefit of using the beta version is worth the risk. We simply want to make the beta version available so that you have options.

G4LC32 Controller Firmware

This download contains the current firmware for the G4LC32 controller. The download also includes firmware for SNAP-LCM4, SNAP-LCSX, SNAP-LCSX-PLUS, M4, M4RTU, and other Opto 22 OptoControl-based controllers.

Note: This firmware is used in conjunction with OptoControl 4.0 and FactoryFloor 4.0 or higher.

Please see important information about this firmware version in the README file included in the download. 

Cyrano Flash Firmware

Current release of 16-bit Cyrano firmware. This firmware is required to run Cyrano strategies on legacy Opto 22 controllers.

Cyrano Flash Firmware and Installation Utility

Current release of 16-bit Cyrano firmware. This firmware is required to run Cyrano strategies on Opto 22 controllers. This file installs the Opto 22 Flash 200 utility (version R3.1i) and Cyrano firmware (version R3.2j).

Cyrano Software

The predecessor to OptoControl, Cyrano is a DOS application for flowchart control programming. This software does not run under Windows NT.

Mistic MMI

Mistic MMI is the predecessor to OptoDisplay. It is a 16-bit Windows 3.x Man-Machine Interface package that is tightly integrated with Cyrano.

OptoTerm Utility for OptoControl Controllers

This download contains a full installation of the most recent version of OptoTerm, a software utility for:

  • Downloading new firmware to an OptoControl-based controller.
  • Viewing the status of an OptoControl-based controller.

No videos or demos are available for this product.