The Siemens 6GT2191-0BH50 is a pre-assembled spiral communication cable that connects an MV320 read/write head to a SIMATIC RF communication module — specifically the RF166C, RF170C, or RF18xC/CI. It's the plug-in link between the antenna and the controller interface in an RFID identification system. The cable is coiled, giving a working length that stretches from 1.6 m to 4 m, with a total cable length of 5 m. That 1:4 elongation ratio means it retracts when not under tension, keeping the line side tidy. Rated for a maximum of 300 V, this is a signal-level cable — not a power feed. The braided shield of tin-plated copper wires keeps RF noise out of the communication line, which matters when the cable runs alongside motor drives or contactors in the panel.
Connector and Wiring Detail
One end terminates in an M12 male, 8-pin, straight connector; the other end is an RJ-50. That RJ-50 is a 10-position modular plug, not the standard 8-position RJ-45 — verify the communication module's port accepts RJ-50 before wiring. The cable carries 4 electrical cores plus data wires with insulation per DIN 47100. Wire insulation is TPE-E, which holds up to flexing in the spiral. Tensile load is limited to 5.6 N maximum — don't use this as a strain relief or pull cord.