Position on the machine
The Schneider Electric XCKM102H29 sits in the Osiswitch XCKM compact limit-switch family, body in ZAMAK zinc alloy with an IP65 sealing at the cable entry, aimed at conveyor end-of-travel, guard interlock, and packaging-machine position feedback where a steel roller plunger meets a moving cam. The 1NO-1NC snap-action block carries 240 VAC at 3 A and 250 VDC at 0.27 A — show me the rating on the nameplate before it sees an inductive DC load, because the DC figure is a fraction of the AC rating and that gap drives the contact-life calculation.
Mechanical envelope around the cam
Pretravel is 3.1 mm and differential travel 1.5 mm on a spring-return plunger, so the cam has to over-travel roughly that differential plus the actuator stroke before re-arming — machine designers read those two numbers together, not in isolation, to size the cam profile and the repeat-accuracy window.
Panel-side integration
Wiring lands on screw-clamp terminals through an ISO M20 x 1.5 cable gland, and the operating envelope runs -13 to 158 DEG F — the gland and the body seal together set the IP65 wet/dust rating at the panel face, not at the conduit thread. For LOTO discipline, the 1NO-1NC positive-opening snap-action pair gives the safety circuit a positively-driven NC contact that opens when the plunger overruns, so the lockout interlock cannot be defeated by a stuck contact — if it's not positively driven, it's not safe to chain into the safety circuit.
Sourcing posture
UPC 78590178936 and the 12-digit 389110973054 are the commercial identifiers a procurement system reads for BOM cross-check; the listed brand mark on the nameplate is Square D / Telemecanique, both Schneider Electric brands.