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Siemens 3RH2911-2HA11 Front Mount Auxiliary Switch - 1 NO + 1 NC

Siemens 3RH2911-2HA11 Front Mount Auxiliary Switch

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ManufacturerSiemens

Part number3RH2911-2HA11

Contact Configuration 1 NO + 1 NC

Mounting Front

Terminal Type Spring-loaded

Compatibility Siemens 3RT2, 3RH2

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12-month warranty

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Veteran-owned

CAGE: 9NK75

One Normally Open (NO) Contact One Normally Closed (NC) Contact Spring-loaded Terminals Front Mountable SIRIUS Series

Product description

The Siemens 3RH2911-2HA11 is a front-mountable auxiliary switch that adds one normally open (NO) and one normally closed (NC) contact to Siemens 3RT2 contactors and 3RH2 contactor relays. It utilizes spring-loaded terminals for fast and reliable connections, making installation efficient. This switch is ideal for expanding the control capabilities of existing contactor and relay systems.

This auxiliary switch is widely used in industrial control panels for feedback signaling, interlocking logic, and status indication. The combination of NO and NC contacts provides versatile functionality for various automation tasks, ensuring robust performance in demanding environments.

Stanlo Automation, a veteran-owned supplier, offers the Siemens 3RH2911-2HA11 auxiliary switch. We provide reliable surplus industrial components to help you maintain and upgrade your automation systems with quality parts.

Technical specifications

Contact Configuration	1 NO + 1 NC
Mounting	Front
Terminal Type	Spring-loaded
Compatibility	Siemens 3RT2, 3RH2
IP Rating	IP20

Common applications

Control Panels

Motor Control

Status Feedback

Interlocking Circuits

Relay Control

Automation Systems

Compatible systems

Siemens 3RT2 Siemens 3RH2

Also known as

Siemens SIRIUS 3RH29 Auxiliary Switch 3RH2911-2HA11 Contactor Auxiliary

Replaces / compatible with

This auxiliary switch is designed to expand the contact functionality of Siemens 3RT2 contactors and 3RH2 contactor relays.

Technical note

Expert tip

The spring-loaded terminals on the 3RH2911-2HA11 ensure a vibration-resistant connection, crucial for reliable operation in industrial settings.

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Frequently asked questions

How does the Siemens 3RH2911-2HA11 auxiliary switch provide both NO and NC contacts?

The Siemens 3RH2911-2HA11 has one set of contacts that are normally open when the main contactor/relay is de-energized and close when it operates, and another set that are normally closed and open when the main device operates. This provides both positive and negative switching signals.