Siemens 3RT1926-2FL11 SIRIUS Solid-State OFF-Delay Auxiliary Switch, 0.05-1s, 200-240V AC/DC for 3RT1 Contactor Original Brand New

Overview

The Siemens 3RT1926-2FL11 is a high-performance, solid-state time-delayed auxiliary switch block designed for seamless integration with the Siemens SIRIUS 3RT1 series contactors (Sizes S0 to S12). This essential accessory adds a crucial OFF-delay timing function to your contactor, perfect for applications requiring a controlled shutdown sequence without an external control signal. It features a versatile voltage range and a robust contact configuration.

Key Features & Specification

• Product Number: 3RT1926-2FL11
• Brand: Siemens SIRIUS
• Product Type: Solid-State Time-Delayed Front-Side Auxiliary Switch Block
• Contactor Compatibility: For mounting onto SIRIUS 3RT1 Contactors (Sizes S0 to S12)
• Time Function: OFF-Delay (Relapse Delayed) without external control signal
• Time Range (Adjustable): $0.05\text{ seconds}\text{ to }1\text{ second}$
• Supply Voltage: $200\dots 240\text{ V AC}/\text{ DC}$
• Contact Configuration: $1\text{ NO (Normally Open) contact, delayed switching}$ and $1\text{ NC (Normally Closed) contact, delayed switching}$
• Mounting: Clip-on (Front-side mounting)
• Terminal Type: Screw terminals
• Protection Class: IP20

Benefit

1. Enhanced Machine Control: Provides reliable, adjustable OFF-delay timing for precise control in machine sequences, ensuring equipment operates safely and efficiently during switch-off.
2. Space and Cost Efficiency: Integrates directly onto the existing 3RT1 contactor, eliminating the need for a separate DIN-rail mounted timing relay and saving valuable panel space and wiring complexity.
3. Solid-State Reliability: Features solid-state technology for high switching reliability, long electrical endurance (up to 100,000 switching cycles at AC-15, 230V), and superior resistance to shock and vibration.
4. Flexible Voltage: Operates reliably across a wide control supply voltage range ($200\text{ V}$ to $240\text{ V}$) for both AC and DC systems.
5. Easy Installation: Designed for simple, clip-on front-side mounting onto SIRIUS 3RT1 contactors, ensuring quick and secure setup.

Function

The OFF-delay function (relapse delayed) means that when the control voltage to the main contactor coil is removed (switching it OFF), the contacts (1NO and 1NC) on the 3RT1926-2FL11 auxiliary switch will only change state after the set time delay (adjustable from $0.05\text{ to }1\text{ second}$) has elapsed. This is ideal for applications like fans, pumps, or conveyors that need to continue running briefly after the main power signal is removed.