SICK PSD01-1501 M 4000 Diffuse Photoelectric Sensor

SICK PSD01-1501 M 4000 is a two-beam safety light-beam barrier configured as the passive unit in the M4000 Standard A/P access‑protection family, designed to pair with an active partner to guard machinery access. The PSD01-1501 passive unit carries two beams with a 500 mm beam spacing and supports a sensing range of 0.5 m to 7.5 m when used with the matching M40Z active unit (example: M40Z-025000RR0). The passive unit is cataloged as part number 1027906 and uses a male M12, 8‑pin system connection for wiring. In safety performance terms, the M4000 Standard A/P combination attains IEC 61496-1 Type 4, EN ISO 13849 PL e, and IEC 61508 SIL 3, with a mission time of 20 years, making it suitable for guarding access on conveyors, presses, and automated cells.