Allen-Bradley 42JS-B2MNB2-F4 Push Button Switch

The Allen-Bradley 42JS-B2MNB2-F4 is a Visisight background-suppression photoelectric sensor from Rockwell Automation, designed for reliable object detection in cluttered backgrounds. This 130 mm background-suppression model uses a red LED light source, operates on DC power, and provides two complementary LO/DO outputs in a sink (NPN) configuration via a 4-pin DC Micro QD connector on a 152 mm (6 in) pigtail. The sensor is part of the 42JS family and is designated for fixed background suppression with a 130 mm sensing range, enabling stable detection even with complex backdrops. Typical applications include presence/absence sensing on production lines and inline inspection tasks where distinguishing foreground objects from background improves reliability.