The Omron CJ1W-CT021 is a high-speed counter module from the CJ series, designed as a special I/O unit for precision motion and process control applications. It includes two independent 32-bit counters capable of handling input pulse frequencies up to 500 kHz, enabling accurate high-speed counting and positioning operations. The module is equipped with two digital inputs, two digital outputs, and 30 soft outputs, providing flexible control and signal processing options. Supporting high-speed closed-loop control, the CJ1W-CT021 delivers a maximum response time of 0.5 milliseconds, ensuring rapid feedback and system responsiveness. This versatile counter unit may be applied in automation systems across North America, Europe, Asia, and worldwide, offering reliable performance for applications requiring fast and precise motion synchronization.