Siemens 3RH2911-1BA01 SIRIUS Auxiliary Switch, Front, 1NC Original Brand New

Overview

The Siemens 3RH2911-1BA01 is a high-quality, front-mounted auxiliary switch block from the SIRIUS line of industrial control gear. Specifically designed as an essential accessory for 3RT2 power contactors and 3RH2 contactor relays, this unit provides reliable signal contacts for control circuits and monitoring functions. Its snap-on front mounting and screw terminals simplify installation, making it a critical component for industrial automation and motor control applications.

Benefit

• Enhanced Control Reliability: Provides one dedicated Normally Closed (1 NC) contact for precise feedback on the contactor/relay status, vital for safety circuits and interlocking.
• Easy, Time-Saving Installation: Features a front-mount snap-on design and robust screw terminals, significantly reducing wiring and assembly time in control panels.
• Seamless Integration: Perfectly matched for direct compatibility with the Siemens 3RT2 contactor and 3RH2 contactor relay families, ensuring optimal performance and system integrity.
• Durable and Long-Lasting: Built to the high SIRIUS standard, offering an excellent mechanical service life suitable for demanding industrial environments.

Function / Application

The 3RH2911-1BA01 auxiliary switch is used to expand the number of contacts on a base unit (3RT2 contactor or 3RH2 relay). The single 1 NC contact changes state simultaneously with the main contactor coil. Typical applications include:

1. Status Indication: Signaling the de-energized state of a contactor (when the NC contact is closed).
2. Control Circuit Interlocking: Providing an NC contact in the control circuit to prevent simultaneous operation of two conflicting devices (e.g., in a reversing starter).
3. Basic Logic Functions: Integrating into complex control logic as an additional input signal.

For more information and to explore a full range of compatible Siemens 3RT2 contactors and 3RH2 contactor relays, visit Turll today.