An Optomux I/O unit is a 4-, 8-, or 16-module grouping accommodating optically-isolated analog or digital I/O modules.  Each Optomux I/O unit consists of a removable "brain" board and an I/O mounting rack.  The removable brain board contains a microprocessor which communicates with the host computer and controls the plug-in I/O modules located on the I/O mounting rack.

There are two types of Optomux modules: analog and digital.  Any combination of analog I/O modules may be plugged into an analog Optomux unit and likewise, any combination of digital I/O modules may be plugged into a digital rack.  Analog and digital Optomux units from the SNAP, brick, and Classic rack families can then be combined on the same serial link providing endless combinations of analog and digital I/O points.

 Optomux I/O Brains

 Optomux I/O Racks

 Optomux G4 I/O Modules

Other System Components:
 

Communication with a host computer is via an RS422/485 serial link composed of a dual twisted pair line that connects to each Optomux station.  The serial data link operates at selectable baud rates from 300 to 38.4k baud.  Optomux stations can be configured for either multi-drop or repeat mode operation.  In multi-drop mode, up to 100 Optomux stations can be networked over a total line length of up to 5,000 feet.  In repeat mode operation, up to 256 Optomux stations can be networked with up to 5,000 feet between stations.  The B1 uses the Optomux protocol. 

Opto 22's  B100 brain board is an intelligent processor that operates as a slave device to a host computer, via an RS 422/485 serial link, to control digital I/O modules.  The B100 mounts on Opto 22 I/O racks with header connectors; racks are available for G4 I/O modules.  The B100 uses the Mistic protocol. 

When combined with an I/O mounting rack, the B1 brain board can perform the following functions:

• Read Inputs 
• Write Outputs 
• Latching 
• Counting 
• Pulse Measurement 
• Time Delays 
• Pulsed Outputs

Each B2 brain board contains a microprocessor that provides the necessary intelligence to carry out serial communications with a host computer and also perform control functions at each channel of I/O.  The B2 brain boards are designed to mount onto any Opto 22 standard analogue I/O mounting rack.

Communication with a host computer is via an RS-422/485 serial link composed of a dual twisted pair cable that connects to each Optomux station.  The serial data link operates at selectable baud rates from 300 to 38.4k baud.  Optomux stations can be configured for either multi-drop or repeat mode operation.  In multi-drop mode, up to 100 Optomux stations can be networked over a total line length of up to 5,000 feet.  In repeat mode operation, up to 256 Optomux stations can be networked with up to 5,000 feet between stations.

The B2 mounts on Opto 22 I/O racks with header connectors; racks are available that accept Standard  G1 analog I/O modules. The B2 uses the Optomux protocol. 

Opto 22's  B200 brain board is an intelligent processor that operates as a slave device to a host computer, via an RS422/485 serial link, to control digital I/O modules.  The B200 mounts on Opto 22 I/O racks with header connectors; racks are available for G1 Analog I/O modules.  The B200 uses the Mistic protocol. 

When combined with an analog I/O mounting rack, the B2 brain board can perform the following functions:

• Read Analog 
• Write Analog 
• Input Averaging 
• High/Low Limit Monitoring 
• Peak and Valley Recording 
• Gain and Offset Calculations 
• Output Waveform Generation

Analog modules are factory-calibrated, offer 12-bit resolution, and require a single 24-volt power supply.  All current loop modules include an isolated loop power supply for added flexibility and reduced instrumentation costs.  Input types include voltage, current, thermocouple, RTD, ICTD, frequency, and velocity.  Outputs include voltage, current, and time-proportional output.