Siemens 3RH2911-1FA22 Auxiliary Contact Module

Siemens 3RH2911-1FA22 is a front-mounted auxiliary contact module for SIRIUS control gear that provides two normally open and two normally closed contacts in a four-pole block designed to mount on compatible 3RT2 contactors and 3RH2 contactor relays. It serves as auxiliary signaling for control circuits without altering the main power path and uses screw terminals for reliable wiring; its mounting supports sizes S0, S00, or S2 for flexible fit across Siemens accessory baselines. Regional documentation notes compatibility with older families such as 3RT1/3RH1 and related lineups, making it a common upgrade path in mixed-fleet installations. The part number 3RH2911-1FA22 identifies this auxiliary contact module within Siemens' accessory portfolio.