Siemens3RA2712-2CB00 Basic AS‑i Module for Star‑Delta (Wye‑Delta) Starters Original Brand New

Overview

The Siemens 3RA2712-2CB00 is a crucial accessory designed to seamlessly integrate motor starter functions into the AS-Interface (AS-i) bus system. This basic module is specifically engineered for Star-Delta (Wye-Delta) starting applications, a common method for reducing inrush current in larger AC motors. Its front snap-on design ensures quick and error-free installation onto communication-capable contactors from the Siemens 3RT20 series (specifically those with the -0CC0 suffix), transforming a standard contactor setup into a fully intelligent, network-ready component.

Key Features & Technical Specification

• Application: Specifically for Star-Delta (Wye-Delta) motor starting circuits.

• System Compatibility: Fully compatible with the AS-Interface (AS-i) bus system.

• Mounting: Simple and secure snap-on front mounting onto the corresponding 3RT20 contactor.

• Contactor Compatibility: Designed for use with communication-capable Siemens 3RT20 contactors (3RT20…-…..-0CC0).

• Connection Type: Equipped with spring-loaded terminals for vibration-proof, fast, and reliable wiring, eliminating the need for periodic re-tightening.

Benefit

• Simplified Wiring & Reduced Cost: Integrating the motor starter into the AS-i network drastically reduces the complexity and cost of traditional parallel wiring.

• Rapid Installation: The spring-loaded terminals and the unique front snap-on mechanism significantly cut down installation and maintenance time.

• Enhanced Diagnostics: Enables real-time communication and diagnostics via the AS-i bus, leading to faster troubleshooting and reduced downtime.

• Space Saving: Modular design minimizes the required panel space compared to discrete wiring of I/O to the starter.

• Reliability: Spring-loaded technology ensures a consistently secure connection, even in high-vibration industrial environments.

Function

The module acts as the interface between the contactor and the AS-i network. When snapped onto the front of the 3RT20 contactor, it draws power and receives control signals (e.g., START, STOP, Delta switch) directly from the AS-i master. It also transmits diagnostic and feedback signals (e.g., operational status, fault) back to the master. This allows a central PLC/Controller to manage the complex star-delta motor starting sequence with minimal physical wiring outside of the AS-i bus cable.

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