Allen-Bradley 42SMF-7101 Fiber Optic Sensor

Allen-Bradley 42SMF-7101 Fiber Optic Sensor is a PHOTOSWITCH 7000 Series photoelectric sensor that uses a fiber-optic path with a visible red emitter to detect targets through fiber cables. It provides a PNP (source) output rated up to 100 mA with a 1 ms response time, and it operates from 11–28 V DC with a 4-pin DC micro QD connector for quick field connections. This model is designed for tight installations where fiber routing is advantageous, letting the sensing element reside away from the controller while delivering fast, repeatable measurements in industrial environments. Typical applications include presence/absence sensing on conveyors, feeders, and packaging lines where direct sight is difficult, and reliability and fast response are important. The 42SMF-7101 is documented in Rockwell Automation literature and product pages as part of the 7000 PHOTOSWITCH family with fiber-optic sensing options and a 4-pin micro QD connection.