Omron C200H-CT021 High-Speed Counter Unit Module

Omron C200H-CT021 High-Speed Counter Unit Module is a two-counter, rack-mounted High-Speed Counter Module (Special I/O Unit) for Omron C200H PLC systems. It processes fast pulse signals from encoders to deliver precise position, speed, and motion feedback, with a maximum counting speed up to 75,000 counts per second. Input options include incremental encoders (open collector) and RS-422 line drivers, and counting modes cover Up/Down, Pulse & Direction, and Phase Difference. The counting range is ±8,388,607 with BCD/Hex selectable, and it provides eight external outputs (NPN/PNP selectable) for signaling. Operating modes include linear, circular, preset, and gate, and the module mounts rack-mounted on the C200H backplane. It is compatible with C200H, C200HS, C200HX, C200HG, and C200HE PLCs, and operates from 0°C to 55°C. Typical applications include high-speed pulse counting and motion feedback in conveyors, packaging machines, and encoder-based positioning systems. Common replacements include Omron CJ1W-CT021 and CS1W-CT021.