Decision Point: Digital vs. Analog Sibling
The XS9E111A1L01M12: The closest functional sibling is XS9E11RPBL01M12 — same XS9 plastic housing, same 10 mm sensing range, same M12 connector, same IP67 rating. The hard difference: the sibling is a standard PNP, normally-closed digital sensor (200 mA max load, 800 Hz switching). This seed is analog. If your panel was wired for a digital PNP sensor, swapping in the analog unit means rewiring the output to a dedicated analog input card and reconfiguring the control logic. No drop-in replacement.