Allen-Bradley 42SMF-7101 is a PHOTOSWITCH 7000-series fiber-optic photoelectric sensor that uses visible red light for detection through a fiber optic path. It provides a PNP (source) output and is shipped with a 3 m (9.8 ft) prewired cable in the standard version; a 42SMF-7101-QD variant is available with a 4-pin DC micro quick-disconnect connector for faster wiring. This fiber optic sensor is designed for compact installations where the sensing head is separated from the electronics, enabling reliable detection through fiber and robust operation in industrial environments.
