Description

ABB RER103

ABB RER103 is a Bus Connections Module for industrial automation systems. It is used to reliably connect ABB controllers to fieldbus or serial communication networks.

Key Functions and Features
1. Core Protection Functions
This is the core value of the RER103, providing comprehensive motor protection:

Thermal Overload Protection (TEF): Simulating the motor’s heating and cooling processes through an accurate thermal model prevents motor overheating and damage due to overload, unbalanced loads, frequent starting, or insufficient cooling. This is its most basic and important protection function.

Jail Protection: Detects rotor stalling due to excessive load during starting or operation and immediately trips the motor.

Short-Circuit Protection: Provides instantaneous or timed short-circuit current protection, often replacing traditional fuses.

Phase Unbalance/Phase Loss Protection: Detects imbalance or loss between power phases, which can cause motor overheating and torque ripple.

Ground Fault Protection: Detects insulation failures between the motor or cable and ground, providing personal safety and equipment protection.

Underload/No-Load Protection: Issues an alarm or trips when the motor load is abnormally low (e.g., a pump running dry or a broken conveyor belt).

Start Timeout Protection: Monitors the motor’s startup process and triggers a trip if the startup time is too long.

Multiple Start Limit: Prevents frequent motor starts within a short period of time, preventing overheating.

2. Control and Monitoring Functions
Direct-on-Line Starter Control: Built-in control logic for direct-on-line motor starting.

Measurement and Metering: Real-time measurement and display of key electrical parameters, such as:

Three-phase current (IL1, IL2, IL3)

Ground current (IE)

Voltage (requires external voltage module)

Power (kW, kVAR, kVA), power factor (cos φ), frequency (Hz)

Thermal capacity utilization (%)

Event Log: Records the latest fault events and alarms, including time, date, and related measured values, to facilitate troubleshooting.

Operation Status Indicator: LED indicators and a display clearly indicate operating, alarm, and trip status.

3. Communication and Integration
Communication Interface: One RS485 communication port is standard.

Communication Protocol: Supports Modbus RTU, enabling easy integration into existing supervisory control and data acquisition systems or distributed control systems (such as ABB’s Ability™ System 800xA) for remote monitoring, data acquisition, and control.

4.Key Applications
The RER103 is widely used in industrial applications requiring reliable motor protection, such as:

Water and Wastewater Treatment: Pumps and Fans

Oil and Gas: Compressors and Pumps

Mining: Conveyors and Crusher

Manufacturing: Machine Tools and Production Lines

Building Automation: Fans and Pumps in HVAC Systems

Technical Specifications

Parameter	Value
Dimensions	120 mm × 80 mm × 60 mm
Weight	≈0.5 kg
Supported protocols	PROFIBUS DP, Modbus RTU, Modbus TCP
Interfaces	1 × PROFIBUS DP, 1 × Modbus RTU (RS‑485)
Power terminals	2 (RS‑485), 4 (PROFIBUS DP)
Termination resistors	2 (RS‑485), 4 (PROFIBUS DP)
Mounting	Standard DIN rail

☀️Tara(Sales Director)

📞Tel: + 86-13806028623

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💬Email: ydf8801@163.com

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🥇Product Condition: One-year warranty

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🔥 Spot inventory, same day shipment

All products are in sufficient stock reserve. After you place an order, we will arrange shipment on the same day to minimize waiting time and help your project progress quickly.

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Support multiple payment methods, including mainstream settlement methods such as T/T, which are safe and convenient, meet the needs of different customers, and make cross-border transactions more worry free.

🛡️ One year warranty, worry free after-sales service
We offer a one-year warranty service for all products! If there are any quality issues, we will provide you with professional after-sales support as soon as possible and provide full protection throughout the process.

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ABB company overview：

1. Basic Information

Full Name: ABB Ltd. (Swiss-Swedish multinational corporation)

Founded: 1988, through the merger of Swedish ASEA and Swiss BBC (Brown Boveri & Cie)

Headquarters: Zurich, Switzerland

Employees: Approximately 100-110,000, with operations in over 100 countries and regions

2. Business Areas
ABB’s business is primarily divided into four segments:

Electrification (Power): Includes high-voltage and medium-voltage switchgear, transformers, and distribution systems, serving power, utility, and industrial customers

Process Automation: PLCs, drives, sensors, and real-time control and optimization systems

Motion & Robotics: Motors, drives, industrial robots, and collaborative robots (such as YuMi)

ABB Ability™: Embeds software, IoT, and AI technologies into these hardware components to enable remote monitoring, predictive maintenance, and energy management

3. Global Presence and Markets

ABB operates in 100 countries worldwide. With branches and R&D centers in multiple countries, ABB employs approximately 105,000-110,000 people. Its operations in China began in 1907 and now include a comprehensive R&D, manufacturing, sales, and engineering services system. In 2025, the company will continue to advance key projects globally, including Industry 4.0, renewable energy, and smart grids.

4. Key Technologies and Innovations

High-Voltage Direct Current (HVDC): Developing and deploying the world’s first commercial HVDC systems.

Industrial Robotics: ABB offers world-leading robotics and discrete automation solutions, with three new robot series to be launched in China in 2025.

Digital Transformation: The ABB Ability platform deeply integrates software and hardware to provide Industrial Internet of Things (IIoT) and AI-driven optimization services.

5. Sustainability and Goals

ABB has made achieving climate neutrality by 2030 a core goal, actively investing in renewable energy, improving energy efficiency, and promoting low-carbon technologies. By helping customers reduce carbon emissions through digitalization and electrification, ABB has achieved more efficient and sustainable operating models across multiple industries.