The Banner Engineering SM2A31RPD is a Mini-Beam AC‑voltage receiver designed for opposed-mode photoelectric sensing in tight machine layouts. It operates from 24 to 240 VAC and provides a solid‑state, 2‑wire output, with a maximum sensing distance of 300 mm and a 650 nm visible red beam. The compact, rectangular housing is thermoplastic with an 18 mm barrel and M18 mounting; it carries a 9 m (30 ft) cable, IP67 ingress protection, and a NEMA 4X rating for robust industrial use. Adjustments include a 15-turn slotted potentiometer and a light/dark operate switch, with LED indicators for status and an overall 2 ms ON / 1 ms OFF response time.
