Siemens 3RT2926-3AF31 Mechanical Latch, 110V AC/DC, Latching Relay for Contactors 3RT202, 3RT232, 3RT252 Original Brand New

Overview

The Siemens 3RT2926-3AF31 is a highly reliable mechanical latching module designed to provide a “latching” or “memory” function for Siemens SIRIUS 3RT2 series contactors. This device allows a contactor to remain in its closed state (energized) even after the control signal has been removed.

It is a crucial component in applications requiring bistable operation, such as safety circuits, emergency stop systems, or control systems where the state must be maintained without continuous power consumption. This latch is compatible with Siemens contactors 3RT202, 3RT232, and 3RT252, offering a seamless and secure integration.

Benefit

• Energy Efficiency: Reduces power consumption by eliminating the need for a continuous holding coil current to keep the contactor energized.
• Enhanced Safety: Provides a “fail-safe” mechanism, ensuring the contactor state is maintained during power fluctuations or control signal interruptions.
• Increased Reliability: The mechanical latching mechanism offers robust and consistent performance in demanding industrial environments.
• Space-Saving Design: Integrates directly with the contactor, eliminating the need for a separate latching relay or complex wiring.
• Versatile Compatibility: Specifically designed to work with the widely used Siemens 3RT202, 3RT232, and 3RT252 contactor series.

Functionality

The Siemens 3RT2926-3AF31 mechanical latch operates by physically holding the contactor’s armature in the “pulled-in” position. It works in conjunction with a separate unlatching coil.

1. Latching (Set): When a momentary control voltage (110V AC/DC) is applied to the latching coil, it engages the mechanical mechanism, which latches the contactor. The contactor will remain closed even if the control voltage is removed.
2. Unlatching (Reset): To release the latch and open the contactor, a separate momentary control voltage is applied to the unlatching coil. This action releases the mechanical hold, allowing the contactor to return to its open state.

Technical Specification

• Product Number: 3RT2926-3AF31
• Type: Mechanical Latch
• Rated Voltage: 110 V AC/DC
• Compatible Contactors: 3RT202, 3RT232, 3RT252
• Operating Temperature: -25°C to +60°C
• Dimensions: (Refer to datasheet for specific dimensions)
• Manufacturer: Siemens
• Series: SIRIUS

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