Siemens 3RT1926-2ED31 Time-Delayed Auxiliary Switch, 5-100s, 240V AC, 1NO+1NC, On-Delay Original Brand New

Overview

The Siemens SIRIUS 3RT1926-2ED31 is a high-performance, solid-state, time-delayed front-side auxiliary switch block designed for seamless integration with SIRIUS 3RT1 contactors (compatible with sizes S0 to S12, depending on model/series). This essential industrial control component features a customizable On-Delay function, allowing for precise control of delayed switching operations in automated systems. With an adjustable time range of 5 to 100 seconds and a control supply voltage of 200-240 V AC, it provides reliable time-based control for motor control and switching applications. It includes 1 Normally Open (NO) and 1 Normally Closed (NC) delayed contact for flexible circuit design.

Key Features & Technical Specification

• Product Number: 3RT1926-2ED31
• Product Brand: Siemens SIRIUS
• Function: Solid-State Time-Delayed Auxiliary Switch
• Delay Type: ON-Delay (Time-delayed make)
• Time Range: Adjustable from 5 seconds to 100 seconds
• Control Supply Voltage: 200 – 240 V AC (50/60 Hz)
• Contact Configuration: 1 NO (Normally Open) and 1 NC (Normally Closed) delayed contacts
• Mounting: Front-side clip-on mounting directly onto 3RT1 contactors (Sizes S0…S12 compatible)
• Termination: Screw-type terminals
• Service Life (Mechanical): Up to 10,000,000 operating cycles (typical)
• IP Protection: IP20 (Finger-safe protection)

Benefit

• Space & Cost Efficiency: Integrates directly onto the front of the contactor, eliminating the need for a separate timing relay and reducing panel space and wiring complexity.
• Enhanced Control: Provides an essential On-Delay function, perfect for sequencing motor starts, controlling conveyor belt delays, or managing staggered loads.
• Robust & Reliable: Part of the trusted Siemens SIRIUS industrial control range, designed for long mechanical and electrical endurance in demanding industrial environments.

Function

The 3RT1926-2ED31 auxiliary switch block is an electronic timer accessory for Siemens 3RT1 series contactors. Upon energization of the contactor coil (with the required 200-240V AC), the time delay begins. After the set time (5-100 seconds) has elapsed, the 1 NO and 1 NC auxiliary contacts simultaneously change their switching state. This On-Delay function is crucial for automation sequences requiring a controlled pause before an auxiliary circuit is activated or deactivated.

Application

Ideal for applications in:

• Motor Control Systems: Delayed start of secondary loads or fans.
• Industrial Automation: Sequencing of operations in production lines.
• Conveyor Systems: Implementing controlled start-up delays.
• HVAC Systems: Timing controls for fan and pump operations.
• Switchgear Panels: Any application requiring reliable time-delayed auxiliary signaling or control logic integrated with a contactor.

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