Siemens SIRIUS 3RA2813-2AW10 Solid-State ON-Delay Auxiliary Switch – 0.05-100s, 24-240V AC/DC Original Brand New

Overview

The Siemens 3RA2813-2AW10 is a high-precision, solid-state time-delayed auxiliary switch from the renowned SIRIUS product family. Designed for front-side mounting on SIRIUS 3RT20 contactors and 3RH2 contactor relays, this ON-delay function module provides reliable time-dependent switching in control circuits. Its wide voltage range and integrated protective circuitry make it a versatile and robust component for industrial automation.

Key Benefit & Advantages

• High Precision Timing: Features a solid-state electronic design for reliable and highly accurate ON-delay timing from 0.05 to 100 seconds.
• Universal Voltage: Operates efficiently across a wide control voltage range of 24-240 V AC/DC (50/60 Hz), simplifying inventory and application planning.
• Integrated Protection: Includes a factory-integrated varistor for attenuation/damping of the contactor coil, enhancing system reliability and contactor lifespan.
• Space-Saving Design: Snap-on mounting directly onto the front of compatible Siemens 3RT20 power contactors and 3RH2 auxiliary contactor relays (Sizes S00 to S3), saving panel space and wiring effort.
• Fast and Secure Connection: Utilizes spring-loaded terminals for vibration-proof, maintenance-free, and time-saving wiring.
• Single Changeover Contact: Equipped with 1 CO (Changeover) relay output for flexible circuit control.

Function and Application

This time-delayed auxiliary switch provides a delayed control signal output after the main contactor coil is energized (ON-delay). It is essential for sequences and interlocking where a time lag is required before a subsequent circuit is closed or opened.

Applications:

• Motor Control: Delaying the start of a second motor or ancillary device in a sequence.
• Interlocking Circuits: Ensuring sequential operation of machines or processes.
• Control Systems: Implementing precise time-dependent functions in industrial automation and process control.

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