What this cable is and where it fits
The 6GT2891-4FN50 is a pre-assembled, highly flexible 6-core communication line from the SIMATIC RF family, designated L-YC11Y 6x1x0.25 6x24AWG CM. It is built as a plug-in or extension cable connecting an RFID reader to a communication module — specifically the ASM 456, RF160C, RF170C, or RF18XC. Both ends carry M12 connectors — male, 8-pin, straight on one side; female, 8-pin, straight on the other — so it drops directly into the reader-to-module link without field wiring. The braided shield of tin-plated copper wires keeps RF noise out of the signal pair, which matters when the cable runs alongside motor drives or switching power supplies in a control cabinet. Rated for 300 V and UL/ETL listed as CM (cable only, without plug), it meets the flame-resistance requirement of IEC 60332-1-2. EAC approval is on file for installations requiring Eurasian conformity.
Mechanical and environmental toughness
The jacket is black PVC, halogen-free is not specified, but it is silicon-free — important for paint-shop or potting applications where silicone outgassing causes adhesion failures. It resists grease, mineral oil, and UV radiation, making it suitable for washdown zones or outdoor reader stations on a conveyor line. Continuous flexing is rated for 3 million bending cycles at a minimum radius of 75 mm; a single stationary bend can go as tight as 21.6 mm. Maximum tensile load during installation is 200 N. The operating temperature range is -30 to +80 °C, covering both freezer-area RFID gates and hot factory floors. Loop resistance per length is 160 mΩ/m maximum, and insulation resistance is 20 GΩ·m — both figures to check against the reader's drive capability if you are extending beyond the standard 50 m.