SS950-20000 by Danaher

The SS950-20000 is a photoelectric light curtain manufactured by Danaher as part of the Timers and Controllers series. It combines an infrared emitter and a synchronized receiver to form a multi-beam barrier that monitors an opening for object or personnel entry. By converting beam interruptions into solid-state control outputs, the unit provides non-contact guarding and part-presence confirmation on conveyors, packaging cells, and compact presses. Slim aluminum housings and supplied mounting brackets simplify attachment to guarding posts or machine frames, eliminating the need for separate protective enclosures.

The sensing resolution is set by a beam spacing of 0.5 in, meaning any opaque item at least 1 in in diameter will be detected. A protected height of 20 in spans the vertical area, and the emitter-receiver pair can be positioned up to 30 ft apart without losing alignment. The array reacts within 25 ms, allowing fast stop commands for short-stroke actuators. Floating deselect is supported, so individual beams can be temporarily muted while pallets or fixtures with openings travel through the curtain. These operating parameters suit guarded entrances where moderate reach and millisecond response are sufficient.

An ingress rating of IP65 protects internal electronics from dust and low-pressure water jets. Stable operation is maintained under ambient illumination levels up to 10000 lx, and the diodes emit at a peak wavelength of 880 nm, consistent with the specified infrared LED source. The light bar has a cross-section of 1.25 × 1.82 in, while its overall height with mounting brackets is 25.20 in, supporting installation in tight spaces. The electronics operate at temperatures up to 50 °C, allowing placement near heat-generating motors or drives without auxiliary cooling.