IO-Link - M20 modules are industrial automation components designed for robust connectivity in harsh environments. These modules are typically produced by leading industrial automation companies, such as ifm (Germany), Balluff (Germany), or Pepperl+Fuchs (Germany), specializing in sensor and control technology. The M20 designation refers to their standardized 20mm threaded housing, ensuring compatibility across industrial systems. These modules serve industries like manufacturing, automotive, and logistics, enabling seamless communication between sensors, actuators, and PLCs via the IO-Link protocol—a point-to-point serial communication standard (IEC 61131-9). Key products include IO-Link masters, hubs, and device couplers supporting real-time data exchange and parameterization.