Siemens 3RA2814-2AW10 Solid-State Time-Delay OFF Switch Original Brand New

Overview

The Siemens 3RA2814-2AW10 is a high-performance solid-state time-delayed auxiliary switch designed for the SIRIUS modular system. This off-delayed (delay-on-break) module is an essential component for industrial control and automation applications requiring precise timing after a control signal is removed. It easily snaps onto the front of compatible Siemens 3RT20 power contactors and 3RH2 contactor relays, simplifying installation and wiring.

Benefit

• Precise Control: Solid-state technology ensures high repetition accuracy and a long electrical lifespan for reliable sequencing of control events.
• Wide Application: The broad voltage range of $24-240\text{ V AC/DC}$ makes it universally suitable for various control circuit applications.
• Simple Integration: Designed for direct, tool-free snap-on mounting to the front of 3RT20 and 3RH2 devices, saving panel space and installation time.
• Enhanced Reliability: Integrated varistor provides effective surge suppression for the contactor coil, protecting the entire system from damaging voltage peaks.
• Maintenance-Free: Spring-loaded terminals offer a secure, vibration-resistant connection, eliminating the need for periodic retightening of screws.

Function / Application

The Off-Delayed (Delay-on-Break) function means that when the control signal is applied, the output contact switches instantaneously. However, when the control signal is removed (de-energized), the auxiliary switch maintains its state for the set time period (0.05-100s) before switching back.

Typical applications for the 3RA2814-2AW10 include:

1. Safety Purge Controls: Keeping a fan or pump running for a set time after the main motor is switched off (e.g., to cool down an element or clear fumes).
2. Sequential Machine Shutdown: Ensuring a chain of processes stops in the correct order, preventing pile-ups on conveyor systems.
3. Delayed Release: Holding a brake or latch active momentarily after the primary command is removed.

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