The legacy Optomux System is not recommended for new development. To update existing Optomux Systems, see Migrating to Newer Opto 22 Products.
The legacy Optomux System, released in 1982, was the first intelligent, serially addressable I/O system, using a simple open ASCII protocol.
The Optomux protocol soon became an industry standard for the distributed intelligent I/O market.
Optomux allowed thousands of points of I/O to be distributed anywhere along a mile-long serial communications link. Processor-intensive tasks, such as counting and latching, were off-loaded to the individual I/O racks. This advance made system performance independent of the number of I/O points.