What you've got here
Omron E2E-X5MF1 2M is an inductive proximity sensor in the E2E family. It senses ferrous metal targets at 5 mm when unshielded – that's the full rated distance without a metal shield surrounding the face. Output is PNP normally open, carried on a 2-meter PVC cable, DC three-wire. Standard oscillation frequency; DC 3-wire PNP output. No self-diagnosis, so it's a straightforward presence sensor – wire it, mount it, done.
Mounting & wiring notes
Unshielded means no metal surround within about three diameters of the sensing face – allow clearance or the effective distance drops. The 2-meter PVC cable terminates straight into a terminal block or M12 connector field; no special stripping beyond what the PVC jacket allows. Standard DC three-wire: brown (V+), blue (V-), black (NO output). PNP sources current; your PLC input should be sinking. If your panel is wired NPN, you'll need a converter or a different sensor.