Siemens 3RH1911-2FA31-0MC0 Auxiliary Switch, 3 NO + 1 NC, Front Mount, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RH1911-2FA31-0MC0 auxiliary switch is engineered for precise control and monitoring of industrial contactors. Designed for front mounting, this high-quality switch features a combination of 3 normally open (NO) and 1 normally closed (NC) contacts, ensuring reliable operation in complex electrical circuits. With spring-loaded terminals for secure wiring and multiple current paths, this auxiliary switch is ideal for seamless integration with Siemens 3RT101 contactors.

Key Benefit

• Reliable Performance: High-quality Siemens engineering ensures consistent operation in industrial environments.

• Flexible Connectivity: 3 NO + 1 NC contact configuration supports versatile circuit design.

• Easy Installation: Front-mounted design with spring-loaded terminals allows quick and secure installation.

• Compatibility: Perfectly compatible with Siemens 3RT101 series contactors.

• Durable Design: Engineered for long-lasting performance in demanding applications.

Function/Application

The 3RH1911-2FA31-0MC0 auxiliary switch is used to signal the contactor’s switching state (on/off) to the control system (like a PLC) or to create interlocks within the motor starter circuit.

• Signaling: The NO contacts can indicate the contactor has pulled in, while the NC contact confirms it is released.

• Interlocking: Used to prevent simultaneous operation of two conflicting circuits (e.g., forward/reverse motors) for safety and equipment protection.

• Control Logic: Provides additional contacts needed for more complex start/stop and monitoring functions in machinery.

Technical Specification

• Product Number: 3RH1911-2FA31-0MC0

• Type: Auxiliary switch, front-mounted

• Contacts: 3 NO + 1 NC

• Current Paths: 1 NO, 1 NC, 1 NO, 1 NO

• Terminals: Spring-loaded

• Compatible With: Siemens 3RT101..-.K…-0LA0

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