What This Part Is
The Siemens 3RK1911-0CS40 is an ECOFAST power cable interface for the ET 200X distributed I/O family. It comes preassembled with a HAN Q8 connector on both the supply (ST) and distribution (BU) sides, using 5 x 2.5 sqmm conductors. The cable length is specified between 3 m and 5 m, ordered in a minimum grid of 10 cm increments.
What the Description Means for Fit
The ECOFAST system is Siemens' preassembled cabling for ET 200X, designed to cut field wiring time on conveyor, material-handling, and process lines. A HAN Q8 connector on both ends means this cable plugs directly into the interface module and the downstream distribution box — no field termination, no pinning errors. The 5 x 2.5 sqmm conductor size handles the power supply feed for a cluster of I/O modules or small motor starters in the ET 200X family.