Overview
The Siemens 3RH2911-1HA11 auxiliary switch is engineered for precise control and monitoring of contactors and relay circuits. This front-mounted switch provides 1 normally open (NO) and 1 normally closed (NC) contact, making it ideal for a wide range of industrial automation applications. With durable screw terminals and compatibility with Siemens 3RT2 contactors and 3RH2 relay systems, it ensures reliable performance and long-lasting operation.
Key Benefit
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Reliable Switching: Provides accurate operation with 1 NO + 1 NC contact configuration.
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Front-Mounted Convenience: Easy installation and accessibility for monitoring and maintenance.
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Secure Connections: Screw terminals ensure safe and stable wiring.
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Wide Compatibility: Designed for Siemens 3RT2 contactors and 3RH2 contactor relays.
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Durable Design: Built to withstand industrial conditions, ensuring long-term reliability.
Function
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Controls and monitors the status of contactors and relays.
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Integrates with Siemens 3RT2 and 3RH2 series for automated systems.
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Enables feedback signals for process control and safety circuits.
Technical Specification
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Product Number: 3RH2911-1HA11
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Type: Auxiliary switch
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Mounting: Front-mounted
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Contacts: 1 NO + 1 NC (.1/.2, .3/.4)
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Current Path: 1 NC, 1 NO
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Terminal Type: Screw terminal
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Compatible With: Siemens 3RT2 contactors, 3RH2 contactor relays
For more of our high-quality industrial automation products, including the complete line of SIRIUS components, please visit the Turll online store.













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