Allen-Bradley 42SRF-6102 Photoelectric Sensor

Allen-Bradley PHOTOSWITCH 42SRF-6102 is a compact photoelectric sensor in the 6000 Series that uses a visible red glass-fiber optic to detect presence via a fiber-linked sensing head. It operates on 10-30 V DC and includes a standard 3 m (9.8 ft) cable for the non-QD version, with the fiber optic arrangement varying by configuration. The model is specified as Light Operate, meaning the output switches when the beam is detected. The product page identifies 42SRF-6102 as part of the PHOTOSWITCH family and notes that this sensor was discontinued on February 28, 2023, with Rockwell recommending engineering replacements. This 42SRF-6102 variant exemplifies Allen-Bradley’s approach to compact fiber-optic sensing, offering a through-fiber interface suitable for accessing tight spaces in automation where a fiber head is advantageous.