The S142ARNN924 is a single-channel photoelectric amplifier designed for through-beam sensors, featuring a detection range up to 50000mm with adjustable sensitivity. It incorporates diagnostic functions and alignment assistance, powered by 24 VAC/DC. The unit provides SPDT relay and NPN outputs with 11-pole plug connection, compliant with UL508, UL325, and CSA standards, and includes an alarm output.