Siemens 3TY2781-2D Auxiliary Switch Block, 2 NO + 2 NC, Right-Side Mounting Original Brand New

Overview

The Siemens 3TY2781-2D is a high-quality auxiliary switch block designed to enhance the functionality and monitoring capabilities of Siemens SIRIUS and other compatible industrial control devices. Featuring a configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, this switch block provides essential signaling for the operational status of your main contactors and relays. Its right-side mounting design ensures easy and secure installation, saving valuable space within your control cabinet. Engineered for reliability and durability, the 3TY2781-2D is an ideal component for a wide range of industrial automation and control applications.

Key Benefit

• Enhanced System Monitoring: With 2 NO and 2 NC contacts, you can accurately track the “on” and “off” status of your main contactor, providing critical feedback for PLC inputs, indicator lights, and other control circuits.
• Space-Saving Design: The right-side mounting feature allows for a compact installation, optimizing space within crowded control panels.
• Reliable Performance: Manufactured by Siemens, a leader in industrial automation, this auxiliary switch block is built to a high standard of quality, ensuring long-term operational reliability and minimal maintenance.
• Easy Integration: Designed for seamless compatibility with Siemens’ SIRIUS line of products, this block can be quickly and securely installed without the need for complex tools or modifications.
• Versatile Application: Suitable for a broad spectrum of industrial environments, including machinery control, building automation, and power distribution systems.

Function

The Siemens 3TY2781-2D auxiliary switch block mechanically links to the main contactor or relay it is attached to. When the main device is energized and its contacts close, the auxiliary switch block’s contacts are actuated. The 2 NO contacts close to signal the operational state, while the 2 NC contacts open. This action provides discrete electrical signals that can be used for a variety of functions, such as:

• Activating indicator lamps on a control panel.
• Providing status feedback to a Programmable Logic Controller (PLC).
• Interlocking with other control circuits to ensure proper operational sequence.
• Triggering audible alarms or other signaling devices.

Technical Specification

• Product Type: Auxiliary Switch Block
• Manufacturer: Siemens
• Model Number: 3TY2781-2D
• Contact Configuration: 2 Normally Open (NO) + 2 Normally Closed (NC)
• Mounting Position: Right-Side
• Compatibility: SIRIUS series contactors and relays (please check specific model compatibility)
• Terminal Type: Screw terminals for secure wire connections
• Standard Compliance: IEC, UL, CSA (refer to datasheet for full list)

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