Siemens 3RH2911-1GA31 Auxiliary Switch 3 NO + 1 NC, Front Mount, Screw Terminal Original Brand New

Overview

The Siemens 3RH2911-1GA31 is a reliable and essential auxiliary switch designed for front mounting on specific Siemens contactor relays. This auxiliary switch provides four additional contact paths, featuring a configuration of three normally open (NO) and one normally closed (NC) contacts. Engineered for seamless integration and performance, it is a key component for expanding the control and signaling capabilities of your industrial automation systems.

Key Benefit & Features

• Expanded Control: Adds 3 NO and 1 NC contact points, allowing for greater flexibility in your control circuits and signaling applications.
• Easy Integration: Designed for front mounting, ensuring a quick and straightforward installation process.
• Secure Connection: Utilizes robust screw terminals for a secure and long-lasting electrical connection.
• Physically Coded: Features physical coding to prevent incorrect installation, ensuring operational safety and reliability.
• High Compatibility: Specifically designed to be combined with Siemens contactor relays 3RH2140 and 3RH2440, ensuring perfect fit and function as per EN 50011 standards.
• Reliable Performance: Manufactured by Siemens, a global leader in industrial technology, guaranteeing high-quality and dependable performance.

Function

The Siemens 3RH2911-1GA31 auxiliary switch extends the functionality of a contactor relay by providing additional auxiliary contacts. When the main contactor is actuated (energized), the auxiliary contacts switch their state. The three NO contacts will close, and the one NC contact will open. This allows the user to:

• Create interlocking circuits to prevent simultaneous operation of two devices.
• Provide status feedback (e.g., to a PLC or indicator light) showing whether the main contactor is open or closed.
• Trigger other relays, timers, or control devices in the sequence of operation.

Technical Specification

• Product Number: 3RH2911-1GA31
• Contact Configuration: 3 NO + 1 NC
• Mounting Type: Front mount
• Terminal Type: Screw terminals
• Current Path Designation: 53/54, 61/62, 73/74, 83/84
• Compatibility: Only compatible with Siemens contactor relays 3RH2140 and 3RH2440 (as per EN 50011)
• Physical Coding: Yes

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