The Siemens 3RK1911-0AH80 is an ECOFAST power bus cable, 5 x 6 sqmm, supplied on a 100 m reel and sold by the meter. It carries power and bus signals to distributed I/O blocks and actuators in an ECOFAST system, replacing point-to-point wiring with a single hybrid cable run.
What the description means for fit
The 5 x 6 sqmm cross-section means the cable carries both the 24 VDC power supply and the PROFIBUS or AS-Interface bus signal in one jacket, sized for the current draw of multiple distributed nodes. The 100 m reel length suits a medium-sized machine cell or a segment of a conveyor line; sold by the meter, you order only the run length you need, avoiding waste.