What it is and where it fits
The Siemens 6GT2891-4FH10-0AX0 is a pre-assembled flexible communication line for connecting an RFID reader to a communication module in the SIMATIC RF family. It links ASM 456, RF160C, RF170C, or RF18XC modules to the reader, with a 1 m length and a protective tube over the cable sheath. The cable is terminated with M12 connectors — an 8-pin male straight on one end and an 8-pin female straight on the other — so it plugs directly into the standard M12 ports on both the reader and the module without field wiring.
Key ratings and what they mean for fit
Rated for a maximum of 300 V, this cable handles the signal-level voltages typical of RFID reader interfaces (usually 24 VDC) with ample headroom. The 300 V rating is the insulation rating of the cable and connectors, not a power-delivery figure — it confirms the cable is suitable for industrial control circuits where transient spikes or longer cable runs might otherwise degrade a lower-rated cable. The cable uses 6 cores of 0.25 mm² (24 AWG) in a L-YC11Y construction with a braided shield of tin-plated copper wires. The shield is essential for maintaining signal integrity in electrically noisy factory environments — without it, RFID read reliability drops near VFDs or welding equipment. The cable jacket is black PVC, and the protective tube is anthracite. It is resistant to grease and mineral oil, and the insulation is rated for UV radiation resistance — relevant if the cable runs along a conveyor or through a washdown zone where oil mist and UV from overhead lighting are present. Flame resistance per IEC 60332-1-2 means the cable will not propagate a flame along its length in a panel fire — a standard requirement for control cabinets and cable trays in most European and North American installations.
Environmental and mechanical limits
The cable is rated for operation, storage, transport, and installation across the same temperature range of -30 to +80 °C. That is a wide industrial range — it survives a hot factory roof in summer and a cold warehouse in winter without derating. Minimum bend radius with a single bend is 21.6 mm; with multiple bends it is 43 mm. These are tight enough to route through cable ducts and around panel corners without stressing the conductors or shield. Loop resistance is 160 mΩ/m maximum, and insulation resistance is 20 GΩ·m — both typical for a signal cable of this gauge and confirm it will not drop significant voltage over the 1 m length.
Sourcing and lifecycle reality
This part is classified as mature in its lifecycle — meaning it is an established, stable product that Siemens continues to support without imminent phase-out. It carries EAC approval for the Eurasian market, and the cable (without plug) has a UL/ETL listing at 300 V with a CM (Communications) rating, so it is accepted in North American installations that require UL-recognized cable.