{"id":"io-link","model_id":"IO-Link","name":"IO-Link","summary":"IO-Link is a standardized point-to-point communication technology for sensors and actuators, specified in IEC 61131-9. It uses a three-wire sensor and actuator connection and can be integrated into fieldbuses. It supports bidirectional communication for diagnostics and parameterization at three communication speeds: 4.8 kBaud, 38.4 kBaud, and 230.4 kBaud.","study_notes":["IO-Link is not a fieldbus; it is a point-to-point connection technology for sensors and actuators.","IO-Link uses standard M12, M8 or M5 connectors and three-wire cables.","IO-Link supports three communication speeds: 4.8 kBaud, 38.4 kBaud and 230.4 kBaud.","IODD (IO Device Description) is delivered as a compressed ZIP file containing the main IODD file, optional language and image files, and the manufacturer's declaration.","IO-Link device profiles standardize process data, parameters and functions for sensors.","IO-Link Wireless removes physical cables while maintaining real-time communication between sensors, actuators and control systems."],"safety_notes":["IO-Link Safety supports functional safety applications.","IO-Link Safety Masters implement communication in higher-level systems such as PROFIsafe, CIPsafety or FSOE (Safety over EtherCAT).","IO-Link Safety Devices can be used unchanged in higher-level systems."],"sources":[{"url":"https://io-link.com/technology","title":"IO-Link Technology: Smarter, More Efficient Communication","accessed":"2026-10-25"},{"url":"https://webstore.iec.ch/en/publication/62427","title":"IEC 61131:2026 SER","accessed":"2026-10-25"}],"verification":{"status":"source_checked","checked_at":"2026-10-25","values":3,"method":"llm_source_check"},"updated_at":"2026-10-25","type":"protocol","spec":{"transports":["serial"],"architecture":"master_slave","encoding":"binary","default_ports":[],"data_types":[],"standard_body":"IEC","standard_ref":"IEC 61131-9","related":["ethercat"]},"url":"https://machineschema.com/protocol/io-link","license":"https://creativecommons.org/licenses/by/4.0/"}