What the part is
The Telemecanique XUSZMF172 is a mounting column/adapter sitting in the XUS light-curtain accessory family, used to support and align light-curtain arrays at the machine guard. It carries UPC 389119619175, which matches the unit-pack identifier you'll see on the factory carton and inbound-receiving paperwork.
Where it sits in a light-curtain build
As a light-curtain mounting column, it sets the optical path height and stand-off distance between the emitter and receiver columns on a fixed guard — getting the column plumb and the floor brackets to the rated footprint is what determines whether the curtain reaches its declared protective height cleanly.
Sourcing posture
With current and no listed successor or phase-out entry on the record, the part is specified into the BOM as a standard build-of-material — quote to order against an RFQ if you need a defined intake against your panel schedule.