Allen-Bradley 42GSP-9000 Photo Switch Diffuse

Allen-Bradley 42GSP-9000 PhotoSwitch Diffuse is a teachable, diffuse‑mode photoelectric sensor from Rockwell Automation’s 9000 series, engineered for short‑range object detection on automation lines. It operates from 11 to 30 VDC and provides DC NPN or PNP transistor outputs for flexible wiring, with a 660 nm visible‑light LED for diffuse reflection sensing and a fast 2 ms response time. The device draws up to 30 mA and supports standard diffuse sensing with light/dark switching. A key feature is Teach mode, which lets the sensor learn both the light and dark conditions of the target and automatically adjust sensitivity for reliable operation. When tested with a white paper target, the maximum sensing distance can reach up to 1.52 m (5 ft), enabling reliable detection on a range of parts within a compact package. This 9000‑series sensor is designed for seamless integration into Rockwell control ecosystems, offering straightforward wiring and compatibility with the 11–30 VDC input specification across model variants. Common applications include presence detection and part verification on assembly lines and packaging equipment, where a compact, robust diffuse sensor can reliably sense surfaces without the need for a separate reflector.