What you're getting
The Siemens SIRIUS 3SE2912-2AA20 is a single-pedal foot switch in a metal IP65 enclosure, so it's built for the floor – dust, washdowns, and the occasional bump from a pallet jack won't kill it. It latches (stays on after you step) instead of momentary, which matters if you're holding a machine in cycle or keeping a test jig powered until you reset it. The cable entry is a standard M20 x 1.5 metric gland hole, and the terminals are one normally-open and one normally-closed contact – one NO and one NC out of the box, wired through the same pedal action.