The Festo SIES-8M-PO-24V-K-2,5-M8D is an inductive proximity sensor from the SIES-8M series, a PNP normally open (NO) output variant with a 2.5-meter cable terminating in an M8 connector. It sits in the inductive sensors category, used for non-contact detection of metal targets in automated machinery — think end-of-stroke sensing on pneumatic actuators, part-presence checks on conveyor nests, or position feedback on pick-and-place grippers.
What the Order Code Tells You
The part number breaks down the key selection parameters: SIES-8M is the series (8 mm diameter, standard M8 threaded barrel), PO means PNP normally open output, 24V is the nominal supply, K-2,5 means a 2.5-meter PVC cable, and M8D is the M8 male 3-pin connector on the cable end. The PNP NO output is the common choice for PLC sinking inputs — when the sensor sees metal, the output switches high. The 2.5-meter cable gives enough reach to route back to a junction box or an M8 splitter without a coupler.
Integration Notes
Mounts in a standard M8 threaded hole — 8 mm barrel, stainless steel or brass body, two hex nuts for positioning. The M8 connector is a standard 3-pin (brown +24V, blue 0V, black output). No special tooling; same footprint as any 8 mm tubular inductive. The 2.5-meter cable is fixed, so plan the cable route before finalizing the connector end. If the panel layout needs a longer drop, the sibling SIES-8M-PO-24V-K-10-M8D carries a 10-meter cable — same electricals, same connector, just more cable to coil.