OPTO22 AC32 Option  ver 2.02 ADFs for AC32, AC33, AC34, 
      LCTRM137.EXE [LCTERM] dumb terminal program (plus other programs)
      OS120.EXE [OPTOSCAN] finds all OPTOMUX stations

AC32 Dual RS-422/485 Adapter For Micro Channel Computers
AC33 PAMUX Bus Adapter For Micro Channel Computers
AC-34 Isolated RS-422/485 Adapter   

LC2 Local Controller   
LC4 Local Controller  

Opto22 is one of the rarest companies, they made microchannel adapters which still work with current production components... As with anything from the mythical PS/2 era, you have to know WHAT works with WHAT in order to find usable stuff on flea-buy...

First, there are two main communications styles, Optomux, RS-422/485, using a DB9 serial port, and Pamux, using a 50 pin flat cable. You cannot directly hook one to the other. You have analog and digital I/O modules, which CANNOT be mixed on the same rack. Finally, the racks power requirements vary.

The AC32 and AC34 -DO- support the PB16HQ Quad I/O modules.

Now comes the Brainboards. B1, B2, B100, B200, E1, E2, and B3000 Brainboards are Optomux compatible. The E1 and E2 Brainboards have an Ethernet port and a RS-422/485 port, but the AC32 / AC34 lack Ethernet.

826    Opto 22 Product Guide (October 1996).

odtkR12a.exe OptoDriver Toolkit for mistic I/O and Optomux Compatibility: Win95, 98, ME, NT, 2k (SP4), WinXP Pro (32-bit SP2)

The OptoDriver Toolkit for mistic I/O and Optomux contains the drivers and documentation necessary for direct communication between application programs running on a PC and Opto 22 mistic and Optomux I/O systems. Applications can be developed using languages such as Microsoft C++ or Microsoft Visual Basic.

NOTE for Optomux users: The OptoDriver Toolkit does not support Ethernet-based brains and does not support communication over Ethernet with E1 and E2 brains. Although you can use this toolkit for serial Optomux communications with E1, E2, B1, B2, and serial B3000 brains, a newer toolkit that handles both serial and Ethernet Optomux is preferable for Windows 2000/XP systems: Optomux Protocol drivers and utilities. The Opto Driver Toolkit is useful, however, for those who have an existing Optomux application based on an older version of the OptoMWD driver for Windows 32-bit or Windows 16-bit systems.

IMPORTANT: The OptoDriver Toolkit is available free of charge. To install it, however, you must supply this password: 12DROWSY98

0882    OptoDriver Toolkit for Custom PC-based Control Data Sheet
1165    PC-Based I/O Overview

Ladder Logic Flowchart Programming Differences and Examples

B1 and B2 Brain Boards (Optomux)
Old B1 - 001828                                   New B1 - 007308

0463    Optomux 16-Channel Digital (B1) and Analog (B2) Brain Boards Data Sheet
0464    B2 Analog Brain Board Data Sheet
1574    B1 and B2 User's Guide
2113    B1 and B2 Jumpers in-the-box
0203    OPTOMUX Protocol User's Guide
0524    Optomux and Optomux Support Products Data Book
0092    Optoware Manual - replaced by Opto 22 1572, the Optomux Protocol Guide.

KB83808 Response times
The B1 and B2 boot up in about 1 second.
The E1 and E2 boot up in about 7 seconds.

B1 Compatible I/O and mounting racks:
- G4 digital I/O: G4PB8H, G4PB16H, G4PB16HC
- Integral G4 I/O: G4PB16J, G4PB16K, G4PB16L
- G1 digital I/O: PB4H, PB8H, PB16H, PB16HC
- Integral G1 I/O: PB16J, PB16K, PB16L
- Quad Pak I/O: PB16HQ

B2 Compatible I/O and Mounting Racks:
G1 analog I/O modules on PB4AH, PB8AH, and PB16AH racks

B4, B5, and B6 Brain Board (Pamux)
0737   B4 Installation Notes - 32-Channel Digital Brain Pamux (B4 is 001788)
0127  (Older) Pamux B4 Manual, Revision K and Lower
0738   B5 Installation Notes - 16-Channel Digital Brain Pamux (B5 is 001830)
0739   B6 Data Sheet - 16-Channel Analog Brain Pamux
0726   Pamux User’s Guide 2006
0726   Pamux User’s Guide 1996
TERM1  Pamux bus Terminator card
TERM2 Pamux Bus Termination Card Shielded Cable

NOTE: The final Pamux brain board on the bus must be terminated with a TERM1 or TERM2 terminator board. A TERM2 board is identical to the TERM1 in size and function. The only difference between the boards is that the TERM2 offers lower line impedance than the TERM1. This may prove useful when using a cable that differs from recommended specifications.

B5 Compatible I/O and mounting racks:
- G4 digital I/O: G4PB8H, G4PB16H, G4PB16HC
- Integral G4 I/O: G4PB16J, G4PB16K, G4PB16L, G4PB32H
- G1 digital I/O: PB4H, PB8H, PB16H, PB16HC
- Integral G1 I/O: PB16J, PB16K, PB16L
- Quad Pak I/O: PB16HQ

B100 and B200 Brain Board (mistic / Optomux)

0729   B100 Data Sheet - 16-Channel Digital Brain, Mistic/Optomux Protocol
0730   B200 Data Sheet - 16-Channel Analog Brain, Mistic/Optomux Protocol

B3000 Brain Board (mistic / Optomux)
0787   B3000 SNAP Analog/Digital Mistic/Optomux Brain Data Sheet
NOTE: If B3000 is jumpered for Optomux protocol, it acts as two B1 digital brain boards and two B2 analog brain boards.
NOTE: B3000-B does not support the Optomux protocol !!!
1794    B3000-B-OMUX uses the Optomux protocol! There is a sticker on it.

The B3000 or B3000-B can be used as an independent processor.  The brain’s built-in event-reaction capability essentially makes the B3000 or B3000-B into a simple-state machine, with some expanded “time-based-state” capability provided by counters and frequency inputs, as well as analog input levels.

B3000 Flash Firmware
If you have a B3000 brain that was manufactured after July 1998, your firmware can only be updated with a hardware upgrade. Older B3000 brains can be updated using special software.

SNAP I/O racks come in three model types: D-series (direct, digital only), B-series (for brains, digital and analog), and N-series (for brains plus remote communication adapters). All SNAP racks use a single 5-volt power source and feature standard panel mounting or DIN rail mounting.

D Series racks use the same 50-pin connector as Opto 22 Classic racks and are therefore compatible with Opto 22 Classic brain boards. B Series racks are designed for integration with SNAP I/O processors (brain boards) and allow a combination of analog and digital modules on the same rack.

1509 SNAP Brain and Rack Compatibility

0784  SNAP B-Series Racks Datasheet Supports mix of Digital & Analog modules w/ B3000
0785    SNAP I/O Mounting Racks: B Series - Terminal Strip Data Sheet
1776    SNAP I/O
Mounting Racks: D Series and B Series
0788    SNAP Component List
0796    SNAP Racks Assembly Instructions
1403    SNAP I/O Wiring Guide
1120    SNAP Power Supplies Data Sheet
0953    SNAP Loop Power Supply Data Sheet SNAP-PS24 and SNAP-PSDIN

E1 and E2 Brain Board (Optomux and Ethernet)
1546    E1 and E2 Brain Board Data Sheet
1563    E1 and E2 User's Guide
1576    I/O Configuration for E1 and E2 Brain Boards
1567    E1 and E2 Architecture and Migration Overview
1581    Using E1 and E2 Brain Boards for Ethernet-to-Serial Routing
1579    E1 and E2 Product Overview
RM_E1_E2_FW    E1 and E2 Firmware README

Application Notes
TN9601  Applying Dry Contact Output Modules
TN9602 Power Supplies for Optomux and Pamux Systems
TN9604  Applying Transformer-Isolated Analog Modules
TN9603B  Operational Interference and Noise
TN9603C  Interference Generation and Compatibility
TN9604   Applying Transformer-Isolated Analog Modules

1104   Guide to Troubleshooting Legacy Opto 22 Products
Opto_LegacyProducts.zip Opto 22 legacy products for Visio 2003 (mistic controllers and I/O, E1s, E2s, and G1 and G4 I/O modules)
Opto_Hmi_and_MiscIcons_v2.vss  Opto 22 Visio Stencil Library of HMI Images( pumps, valves, compressors, tanks, gauges, etc.)

Mounting Racks

0484   PB16AH - G1 16-channel Analog Mounting Rack.  Optomux E2, B2, Pamux B6, mistic B200.
0452   PB16H - G1 16-channel Rack with Header Connector (Digital)   Optomux E1, B1, Pamux B5, mistic B100.
0456   PB16HC - G1 16-channel Rack w/Header Connector, Extra Terminal Connector (Digital)   Optomux E1, B1, Pamux B5, mistic B100.
0482   PB4AH - G1 4-channel Analog Mounting Rack    Optomux E2, B2, Pamux B6, mistic B200.
0477   PB4H - G1 4-channel Rack with Header Connector (Digital)  Optomux E1, B1, Pamux B5, mistic B100. PBSA, PBSB, PBSC psu.
0483   PB8AH - G1 8-channel Analog Mounting Rack    Optomux E2, B2, Pamux B6, mistic B200.
0478   PB8H - G1 8-channel Rack with Header Connector (Digital)  Optomux E1, B1, Pamux B5, mistic B100. PBSA, PBSB, PBSC psu.

NOTE: I/O racks without the “H” suffix may not have the correct on connections to supply power to the brain board. These non "H" racks are probably in the G4 and Quad Module racks.

0479   PB16HQ Quad 4-Module Position Rack (16 channel)  Data Sheet Optomux, Pamux, and Mistic protocol brain boards
1271   Using Power Supplies with Opto 22 Systems

0490   Classic Accessories - Cables
1120   SNAP Power Supplies

0491 PBSA (120v), PBSB (220v), and PBSC (12/24v) 5v DC power supplies

0489   Fuses data sheet

Technical Support FAQ  January 28, 1998

Module Part Numbering
IDC - DC input - White
IAC - AC input - Yellow
ODC - DC output - Red
OAC - AC output - Black


0108    Optomux and Local Controller Programming Notes
           Apps and programs for LC2 / LC4 controllers. Programs are IBM PC BASIC or FORTH 83, resident languages on  LC2/LC4.

LC4 64180 8-bit CPU, 6.144 MHz, 32KB EPROM, 64KB RAM (32KB Application, 32KB RAM disk)
0475   LC4-family Single-board Controller Data Sheet LC4A (120v), LC4B (220v), LC4DC (10-28v DC)        
0157   LC4 Hardware Description and Installation Manual

Snippet: Rev A LC4 have "Address" jumpers and no 4th jumper.
LC4 supports 27256 (32KB) and 27512 (64KB) EPROM.
AUTO Jumper - Auto-Boot upon power-up when jumpered.
EPROM chip (model no: L4P2xx) provided by Paragon to run control blocks that come with standard functions.
LC4 can be programmed in BASIC, FORTH, or PARAGON LC

0173   LC2/LC4 Opto 22 FORTH (subset of FORTH-83)
0201   LC2/LC4 BASIC Details

0466   AC7 RS232 to RS422 Converter (AC7 is 12v DC)
0233   AC7A - AC7B Users Guide RS232-RS422/485 Converter (7A is 120v, 7B is 220v)
0960   AC7A/B Adapter Card Data Sheet  RS232-RS422/485 Converter (7A 120v, 7B 220v)

Forth-83 Books

Starting Forth: An Introduction to the Forth Language and Operating System for Beginners and Professionals, 2nd Ed. 1987
By Leo Brodie
ISBN-10: 0138430799
ISBN-13: 978-0138430795

Thinking Forth: A Language and Philosophy for Solving Problems, 1984
By Leo Brodie
ISBN 10: 0139175768
ISBN 13: 9780139175763

Mastering Forth 2nd Ed, 1989
by Martin Tracy and  Anita Anderson
ISBN-10: 0135599571
ISBN-13: 978-0135599570


0494   Hand-Held Terminal for Optomux part number: LC COMMUNICATOR.
LCTERM Version 1.35 -  Simple terminal program that communicates with LC4 and LC2 controllers.
227.0   LC Communicator User Manual

Cyrano     Opto-22     Forth for a proprietary embedded controller. Cyrano runs on Pamux....
0702   Cyrano User's Guide
0703   Cyrano Command Reference
0704   Cyrano Tutorial


Microchannel Adapters
@6C68.ADF - OPTO 22 AC32 Dual RS-422/485 Adapter
@6C69.ADF - OPTO 22 AC33 PAMUX 4 Adapter

184.6   AC34 Isolated RS-485 Serial Port User's Manual

LCTERM Version 1.35 -  Simple terminal program that communicates with LC4 and LC2 controllers.

os.exe   OptoScan R.131 DOS
oswin.zip OptoScan Windows 16-bit
oswin32.zip OptoScan Windows 32-bit

PamScan R3.0a DOS utilities for troubleshooting Pamux hardware. AC28 in the Help file...

AC32 Dual RS-422/485 Adapter For Micro Channel Computers

The AC32 is a dual RS-422/485 adapter card (transient protected) and features two independent asynchronous channels (each able to drive up to 100 devices on a multidrop network). Channel A can be selected for COM1 through COM8 and channel B can be selected for COM2 through COM8. The AC32 offers full hardware and software compatibility with IBM PS/2 Models 50, 60, 70, 80, and compatible computers. The AC32 operates as a full duplex device with transmission speeds up to 38,400 baud for distances up to 5,000 feet using two twisted pairs per channel and a ground.

J1 (A) - DB9
J2 (B) - DB9

AC32 Jumpers

Each port is configured on the adapter by a group of 8 jumpers. Both Bank 'A" and "B" jumpers share the same function.




Pull up jumper for transmit line


Terminate jumper for transmit line


Pull down jumper for transmit line


Terminate jumper for receive line


Pull down jumper for receive line


Pull up jumper for receive line


Enables RS-422/485 driver from RTS output on UART


Not used

Serial Port Pinout

AC33 PAMUX Bus Adapter For Micro Channel Computers

The AC33 interfaces to a PAMUX network. Each AC33 can drive up to 512 digital I/O points, 512 analog I/O points, or a combination thereof over a total distance of 500 feet.

J1 - 50 pin male header.

Connecting Wire
    This is the wiring between the D shell connector and the first OPTOMUX on the link.

Please note that the pin numbers are labeled on the connector.

Communicating With OPTOMUX

   Before applying power to OPTOMUX Brain Board(s), set the baud rate and command protocol on the OPTOMUX Brain Board(s).  The baud rate and command protocol are selected by the B group of jumpers on the OPTOMUX Brain Board(s). (Please refer to the OPTOMUX B1 and B2 Digital and Analog Brain Boards Operations Manual, Form 203 for additional information.)

For the checkout, remove all of the group B jumpers from one OPTOMUX Brain Board and disconnect all other OPTOMUX Brain Boards on the network. This will select a baud rate of 300, the four-pass protocol, and an OPTOMUX address of 255.

 Connect the D shell connector to the AC34 card and turn on the power to the IBM PS/2 and the OPTOMUX.  To test the link, enter the IBM BASIC interpreter and type in the following program. The underlined part of line ten must be changed to COM1 when using the AC34 card as communications port one.

10        OPEN "COM2:300,N,8,1,RS,CS,CD,DS" AS #1
20        PRINT #1,°>FFACD"
30        INPUT #1,B$
40        PRINT B$

When running the program, both the receive and transmit LED's on the OPTOMUX will flash. The IBM PS/2 will display the AFFACD on the screen. If nothing is displayed, verify that all the wiring has been done correctly.