3RT1926-2FL31

Description

Overview

The Siemens 3RT1926-2FL31 is a high-performance, solid-state, time-delayed auxiliary switch block from the SIRIUS line, designed for seamless front-side mounting onto SIRIUS 3RT1 power contactors (Sizes S0 to S12, though commonly used on S6-S12). This essential control circuit component provides reliable OFF-delay timing functionality without requiring an external control signal. It expands the switching capabilities of your contactor, offering precise, electronic timing control for various industrial automation and motor control applications.

Key Features & Benefit

• Solid-State Design: Ensures long-lasting performance and minimal mechanical wear.

• Time-Delayed Function: Adjustable delay from 5 to 100 seconds, ideal for automation and safety systems.

• Versatile Voltage Support: Operates on 200–240 V AC/DC, compatible with various industrial setups.

• Dual Contact Configuration: Includes 1 NO and 1 NC contact, enhancing operational flexibility.

• OFF Delay Operation: Delivers precise control of processes and equipment shutdown timing.

• Easy Integration: Compatible with Siemens 3RT1 series contactors, simplifying system upgrades.

• Maintenance-Free Operation: Solid-state technology reduces the need for frequent replacements.

Function and Application

The 3RT1926-2FL31 serves as a vital accessory for Siemens 3RT1 contactors (Sizes S6 to S12 are most common for the 3RT1926 series). The OFF-delay function means that when the main contactor is de-energized, the auxiliary switch contacts will remain in their energized state for the preset time (5 to 100 seconds) before switching back. This is critical for applications like:

• Cooling Fan Overrun: Keeping a fan running for a set period after a motor stops to ensure adequate cooling.
• Process Sequence Control: Ensuring a subsequent step in an automated process only begins after a specific delay following the shutdown of a previous stage.
• Warning/Signaling: Maintaining a warning light or buzzer for a duration after machine shutdown.

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