What it is and what it does
The Square D / Telemecanique XUB5APBWM12 is an adjustable diffuse-mode photoelectric sensor in the XUB tubular series, with an 18 mm threaded barrel and a 4-pin micro (M12) connector on a 3-wire pigtail. Diffuse sensing means the emitter and receiver live in the same housing and the sensor detects light reflected back from the target itself, so it needs no separate reflector — convenient for short-range object detection on conveyors, small-parts feeders and packaging lines where mounting a reflector on the far side is awkward. The infrared beam is rated to a 23.6 INCH sensing distance, with sensing oriented 90 DEG to the side of the barrel, so the body can thread through a bracket while the optical axis looks out sideways.
Electrical interface
Power is 12 TO 24 VDC, the output is a PNP sourcing transistor in the NC (normally closed) configuration, and the load current is rated 100 MILLIAMPERE — i.e. it sources up to 100 mA to a sinking PLC input or a small relay coil, not a heavy load. Response time is 1 MILLISECOND on and off, with an operating (switching) frequency of 500 HZ, so it can keep up with fast parts on a conveyor without missing counts. A yellow LED on the housing indicates output state, giving a visual check during commissioning without a meter.
Environment and mechanical fit
The housing is PBT plastic with a threaded 18 mm body, sealed to NEMA 4X/12 and IP67, which covers washdown zones and outdoor mounting on a process skid. Operating temperature spans -13 TO 131 DEG F, so it sits comfortably in unheated cabinets and most factory floors without cold-start or heat-soak derating on the sensing range. Connection is the standard 4-pin M12 micro connector, and the sensor body threads into the usual 18 mm through-hole bracket — drop-in for any panel laid out around the XUB form factor.
Compliance paperwork
The sensor carries UL, CSA and CE approvals, which is the usual decl-pack content for shipping to North American and European sites. The product ships with a California Proposition 65 warning covering DINP and DIDP phthalates — the kind of line item the receiving dock should see on the packing slip and route into the chemical-exposure file.