What it is and what it does
The Siemens SIRIUS 3RH2914-2GP11 is a coupling link — a 24 V DC auxiliary contact block designed for front-side mounting onto 3RT2 power contactors and 3RH2 auxiliary contactors. It adds one normally-open (NO) instantaneous contact to the assembly, rated 1 A at 24 V, 0.2 A at 110 V, 0.1 A at 220 V, and 3 A at 230 V. The spring-loaded terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) solid conductors.
Fit and mounting
This link mounts directly to the front of the contactor — no DIN rail needed. It's sized for S00, S0, S2, and S3 contactor frames, so it spans the common 3RT2 power contactor range. Dimensions are compact: 45 mm wide, 35 mm high, 50 mm deep. The IP20 front protection means it's safe for finger-probe access inside a closed panel. Mounting position is unrestricted.