Siemens 3RH2911-2FA22 Auxiliary Contact

The auxiliary contact, also known as switching contact, signal contact, or reporting contact, from Siemens with type number 3RH2911-2FA22 is an electrical component for contactors and circuit breakers. It has the dimensions 5 x 5 x 5 cm and weighs 0.06 kg. Another part number for this product is 10034605 from Technotrans. Auxiliary contacts serve to extend the functionality of main circuits by providing additional control and signaling functions for downstream electrical systems or equipment. Typical applications can be found in building automation for status reporting of switching devices and in industrial control systems for interlocking safety-relevant operating functions.