Siemens SIRIUS 3RH1 auxiliary switch block, 3RH1911-2GA22-ZW97, 2 NO + 2 NC, spring-type terminal, 4-pole, for contactor relays.
The Siemens 3RH1911-2GA22-ZW97 is a 4-pole auxiliary switch block designed for SIRIUS 3RH1 contactor relays. It provides 2 normally-open and 2 normally-closed contacts (2 NO + 2 NC) arranged per EN 50011, with spring-type terminals for fast, vibration-resistant wiring. This is the part that tells the PLC or safety circuit whether the main contactor has picked up or dropped out — critical for status feedback on motor starters, conveyor drives, or pump panels.
The official successor is the SIRIUS 3RH2 series auxiliary switch block. Check the 3RH2 catalog for a direct pin-compatible replacement that matches the 2 NO + 2 NC contact arrangement and spring-type terminal style.
It is a 4-pole auxiliary switch block with 2 normally-open and 2 normally-closed contacts (2 NO + 2 NC) arranged per EN 50011. Terminals are spring-type. It is designed for SIRIUS 3RH1 contactor relays.
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