The retro-reflex barrier works with a fine laser beam and a reflector. The collimated laser beam of laser class 1 detects objects, for instance, when conducting installation, feed or presence controls, starting at a size of one millimeter over the entire range. The IO-Link interface can be used to configure retro-reflective barriers (PNP/NPN, NC/NO, switching distance) and to display the switching distances and signal values. Range: 12000 mm. Speed: 2000 Hz. Output: PNP. Circuit: NO. Housing: 32 × 16 × 12 mm (1K)