Cable description and sourcing
The Siemens 3RK1911-0AG80 is an ECOFAST power bus cable with a 5 x 4 sqmm conductor cross-section, supplied in a 100-meter length and sold by the meter. This is the cable that carries both power and signal to ECOFAST field-distribution modules in a Siemens automation system — typically used to feed distributed I/O, actuators, and sensors on a machine or line without running individual home-run cables back to the panel.