What it is
The Square D Switches & Sensors Telemecanique XUYFANEP40002 is a photoelectric fork sensor (Category: Photoelectric Sensors), part of the XUY fork-format series used in industrial automation panels and small conveyor lines. Cycle-time spec hangs on the fork construction — emitter and receiver sit on a fixed U-shaped body so the through-beam path is pre-aligned at the factory, which removes the separate reflect-and-align step that costs cycle time on standard through-beam pairs.
Series context
The XUY fork series shares a body family across the range — the XUYFANEP40030 sibling carries 30 mm fixed-fork sensing distance, 12 to 24 VDC operating voltage, IP65 enclosure, M8 4-pin male connector, NPN/PNP output, 40 mA input current, 100 mA maximum load current, 10 kHz switching frequency, and a -20 to 20 microsecond response window, which is the operating envelope to expect when the XUYFANEP40002 lands in the same panel footprint. Pin compatibility at the M8 4-pin connector on the XUYFANEP40030 means a drop-in on the wiring harness is the working assumption when a line was specified around a current XUY-series fork sensor, not a rewire.