What it is and what it does
The Siemens 3RH2914-1GP11 is a SIRIUS coupling link — a 24 V DC auxiliary contact block that mounts directly to the front of 3RT2 power contactors and 3RH2 auxiliary contactors. It provides one normally-open (1 NO) instantaneous auxiliary contact, rated 1 A at 24 V DC, 0.2 A at 110 V, 0.1 A at 220 V, and 3 A at 230 V. The coil pulls in at 24 V DC with a tolerance of 0.7 to 1.25 times rated voltage.
Where it fits and how it mounts
This coupling link is sized for SIRIUS contactor frames S00, S0, S2, and S3. It fastens by direct mounting — no DIN rail required — and can be installed in any mounting position. Dimensions are 45 mm wide, 35 mm high, and 50 mm deep. Screw terminals accept solid conductors: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), or 2x (0.5 to 1.5 mm²) with core-end processing. Front-side IP20 protection keeps fingers out of the terminal area inside an enclosure.