Siemens 3RH1951-1SA11 Additional Auxiliary Contact Block, 1 NC 1 NO Side Mount Original Brand New

Overview

The Siemens SIRIUS 3RH1951-1SA11 is an essential accessory for extending the control and signaling capabilities of specific Siemens power contactors. This high-quality, side-mountable auxiliary contact block is designed specifically for the SIRIUS 3RT135, 3RT136, and 3RT137 series contactors. It provides an additional set of contacts, crucial for complex control circuits in industrial automation. Featuring a classic configuration of 1 Normally Open (NO) and 1 Normally Closed (NC) instantaneous contact, it ensures reliable feedback and interlocking functions. The robust screw terminals simplify wiring, making installation quick and secure.

Key Features & Function

• Compatibility: Fits Siemens 3RT135, 3RT136, 3RT137 contactors.

• Configuration: 1 Normally Closed (NC) + 1 Normally Open (NO) contact for versatile control.

• Mounting: Can be mounted on the side of the main contactor for easy installation.

• Connection Type: Secure screw terminals for reliable electrical connections.

• Durability: High-quality Siemens construction ensures long-term reliability in industrial environments.

Benefit

• Enhanced Control: Allows monitoring and auxiliary switching for advanced automation setups.

• Easy Installation: Side-mount design simplifies assembly and maintenance.

• Reliable Performance: Screw terminals ensure secure, vibration-resistant connections.

• Versatile Application: Compatible with multiple Siemens 3RT series contactors.

Application

The Siemens 3RH1951-1SA11 auxiliary contact block is a vital component in various control and automation systems, including:

• Motor Control Centers (MCCs): For signaling the ON/OFF status of motors controlled by 3RT13 contactors.
• Interlocking Circuits: Implementing safety logic by interlocking controls to prevent simultaneous operation of opposing contactors (e.g., in reversing applications).
• Automation & PLC Systems: Providing input signals to Programmable Logic Controllers (PLCs) or other control devices.
• Remote Signaling: Extending contacts to pilot lights or remote indicators.

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