The Square D OsiSense XS4P18MB230L1 is an 18 mm inductive proximity sensor with an 8 mm sensing distance, NC output, 2‑wire design, and 24–240 VAC or 24–210 VDC supply. It includes a 5 m PVR cable, IP68 enclosure, and switching frequency of 25 Hz AC or 2000 Hz DC.
The closest functional cousin in the same 18 mm XS4P series is XS4P18MA230K — identical body, sensing distance, and voltage range, but with a 3‑pin micro connector instead of the 5 m cable and a NO output instead of NC. If your existing panel was wired for XS4P18MA230K, you cannot simply swap in XS4P18MB230L1 without changing the circuit logic (NC vs NO) and the termination (cable vs connector). The wiring difference means a BOM change, not a field‑expedient substitution.