The 6GT2891-0NH50 is a 5 m, 4-core, highly flexible PUR cable terminated with an M12 male (straight, 4-pin) on one end and an M12 female (straight, 4-pin) on the other. It's the designated plug-in cable for connecting a 24 V power supply to an RF600 reader — specifically the RF640R and RF670R models, mating to power supply units 6GT2898-0AA00, 6GT2898-0AA10, or 6GT2898-0AA20.
This cable is built for the washdown and dust-exposure environment of an RF600 reader station. The PUR jacket and IP65 rating mean it handles splashing water and dust ingress on the line — no extra conduit needed for the last meter to the reader head. The 5 m length is the working span between the reader and its power supply, not a pigtail. If your reader is further than 5 m from the supply unit, you'll need a different order code or a junction box. The M12 straight connectors are the standard 4-pin A-coded profile, so they lock into the reader and supply ports without adapters.