What this is and what it connects
The Siemens 3RK1911-0CP30 is an ECOFAST power cable interface — a preassembled 5 x 4 sqmm cable with HAN Q8 connectors crimped on both ends, cut to a specific length between 3 m and 5 m. This is the field-side wiring drop for ECOFAST distribution boxes in Siemens AS-Interface and motor starter systems, carrying motor power and brake control to a remote station. The HAN Q8 industrial connector on both sides means it mates directly into the ECOFAST module and the motor/actuator junction box without field wiring or glanding.
Length and ordering grid
The cable is supplied to a specific length between >3 m and <5 m. When ordering, the minimum grid increment is 10 cm — you specify the exact drop length in 10 cm steps within that range. The preassembled HAN Q8 on both sides eliminates field termination time; the connector pinout follows the ECOFAST standard (ST/BU coding), so it mates correctly with the module and the load side without a wiring check.