Siemens 3RH2911-4NF02 Auxiliary Switch, Front Mount, 2 NC, Solid-State Compatible Original Brand New

Overview

The Siemens 3RH2911-4NF02 is a high-performance solid-state compatible auxiliary switch designed for critical signaling and control circuit applications. Part of the reliable SIRIUS modular system, this front-mountable auxiliary switch block seamlessly integrates with Siemens 3RT2 power contactors and 3RH2 contactor relays of all sizes.

It is engineered for tool-less installation, providing a fast and secure expansion of auxiliary contacts in your control systems. Featuring a total of 2 Normally Closed (NC) contacts, both of which are solid-state compatible, this accessory ensures precise and dependable switching for low-current electronic circuits, making it ideal for modern PLC inputs.

Benefits & Features

• Solid-State Compatible: Engineered for reliable switching in low-current electronic circuits, such as direct connection to PLC or micro-controller inputs.
• Easy & Fast Installation: The front snap-on mounting allows for tool-less and quick assembly onto the main contactor, minimizing installation time.
• High Compatibility: Designed specifically for seamless integration with the versatile Siemens SIRIUS line of 3RT2 contactors and 3RH2 contactor relays.
• Secure Connection: Utilizes ring cable lug connection terminals, ensuring a robust and vibration-proof connection, critical for industrial environments.
• Compact Design: The front-mounting design maintains the compact footprint of the contactor, saving space in control cabinets.

Function

The 3RH2911-4NF02 auxiliary switch serves to expand the number of auxiliary contacts available on a contactor or contactor relay. With its 2 NC instantaneous contacts, it provides two separate negative signals to the control circuit, typically used for interlocking, status feedback, or complex control functions, especially where compatibility with electronic control units (like a PLC) is required.

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