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Siemens 3RH2911-1FA22 Front Auxiliary Switch - 2 NO + 2 NC

Siemens 3RH2911-1FA22 Front Auxiliary Switch (2 NO + 2 NC).

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ManufacturerSiemens

Part number3RH2911-1FA22

Type Auxiliary Switch

Mounting Front

Number of NO Contacts 2

Number of NC Contacts 2

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Veteran-owned

CAGE: 9NK75

2 Normally Open, 2 Normally Closed Contacts Front Mounting Screw Terminals For 3RT2/3RH2 Versatile Switching High Reliability

Product description

The Siemens 3RH2911-1FA22 is a front-mounting auxiliary switch module designed for Siemens 3RT2 contactors and 3RH2 contactor relays. This versatile unit offers a combination of 2 normally open (NO) and 2 normally closed (NC) contacts, connected via screw terminals. The current paths are designated as 1 NO, 1 NC, 1 NC, 1 NO.

This auxiliary switch is ideal for applications requiring both make and break signaling or interlocking functions. It allows for flexible integration into control circuits, providing status feedback, safety interlocks, or additional control logic for automated systems.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, carries the Siemens 3RH2911-1FA22. Ensure your operations run smoothly with our reliable surplus components, backed by fast shipping and expert service.

Technical specifications

Type	Auxiliary Switch
Mounting	Front
Number of NO Contacts	2
Number of NC Contacts	2
Terminal Type	Screw
Compatible With	3RT2, 3RH2
Current Path	1 NO, 1 NC, 1 NC, 1 NO

Common applications

Control Panels

Automation Feedback

Interlocking Circuits

Status Signaling

Relay Logic

Machine Tool Control

Safety Circuits

Compatible systems

Siemens SIRIUS 3RT2 Contactors Siemens SIRIUS 3RH2 Contactor Relays Industrial Control Panels

Also known as

Siemens 3RH2911-1FA22 Switch 3RH29111FA22 Siemens 2NO2NC Auxiliary Contact

Replaces / compatible with

This auxiliary switch expands the contact configurations for Siemens 3RT2 contactors and 3RH2 contactor relays, enabling more complex control and signaling. It is compatible with all standard 3RT2 and 3RH2 devices.

Technical note

Expert tip

The dual NO/NC configuration on the 3RH2911-1FA22 is particularly useful for implementing safety interlocks where both opening and closing of a circuit need to be monitored.

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Frequently asked questions

What are the terminal designations for the Siemens 3RH2911-1FA22?

The Siemens 3RH2911-1FA22 has terminals designated for its mixed contact configuration: .3/.4 for the NO contacts and .1/.2 for the NC contacts. The current path is listed as 1 NO, 1 NC, 1 NC, 1 NO.