The XUK9ARCNL2 is a polarized retroreflective photoelectric sensor from the XU series, with a PMMA lens and a 6 m sensing range. It packs a relay output (1NO/1NC) and accepts 24-240V AC or DC—so it runs on whatever supply voltage is already on the panel. The rectangular PBT housing is rated IP65 and NEMA 4X, which puts it in washdown zones without a secondary enclosure. Response time sits at 25 ms and switching frequency at 20 Hz, so it is suited for discrete object detection, not high-speed counting.
The relay contacts (1NO/1NC) are electromechanical—they switch up to the rated load directly, so no external interposing relay for moderate currents. The universal 24-240V AC/DC supply means the sensor connects directly to the same control voltage as a contactor coil or PLC power supply, without a dedicated DC converter. The PMMA lens is spec'd for the polarized retroreflective method—it ignores shiny objects and reads the retroreflector. At 6 m you cover a bin or conveyor approach; the right-angle face orientation aims the beam parallel to the housing's short side.
How it compares to XURK1KSMM12
For a panel originally specified around the XURK1KSMM12 (diffuse, NPN/PNP, 12-24V DC, M12 connector), the XUK9ARCNL2 brings a relay output and a universal AC/DC supply. That means the wiring scheme changes: the XUK9ARCNL2 needs a 240V supply and its relay contacts, while the XURK1KSMM12 uses a DC-only solid-state output. They are not drop-in interchangeable. If the BOM calls for the XURK1KSMM12 and you are considering the XUK9ARCNL2, confirm the load type and supply voltage first.