The Omron CQM1H-CLK21 Controller Link Unit is a high-performance communication module engineered to facilitate efficient and reliable data exchange within industrial control networks. Designed for seamless integration into Omron’s CQM1H series PLC systems, it manages and stores network parameters and routing tables to ensure stable, synchronized communication between interconnected devices. With a lightweight construction of approximately 200 g, the CQM1H-CLK21 offers simple installation and compatibility with existing setups. Operating with a low current consumption of 290 mA, it provides optimized power efficiency without compromising communication reliability. When combined with other Omron network and control components, this unit enhances overall system performance and coordination. The CQM1H-CLK21 could be deployed in automation networks across North America, Europe, Asia, and other worldwide markets, delivering dependable, high-speed communication for advanced and scalable industrial control systems.