The ABB REM545BM223AAAA is a comprehensive machine terminal designed for the protection, control, measurement, and supervision of synchronous and asynchronous motors. Part of the RE500 series, this terminal is a multifunctional unit that handles demanding motor applications across various industrial sectors. It combines advanced protection algorithms with flexible I/O logic, allowing it to act as both a safety device and a localized control center for high-voltage motors.

 

Product Specifications and Technical Data

The REM545 series is known for its modular design and extensive library of protection functions, including thermal overload, overcurrent, and differential protection.

Technical Datasheet

• Product Name: ABB REM545BM223AAAA Machine Terminal
• Protection Type: Integrated Motor Protection & Control
• Dimensions: 260 mm x 180 mm x 225 mm
• Weight: 4.50 kg
• Country of Origin: Finland
• Input Voltage: 100-240V AC / 110-220V DC (Power Supply dependent)
• Communication: LON, SPA, IEC 60870-5-103, Modbus RTU/TCP
• Display: Integrated HMI with Backlit LCD

 

Application Fields

The ABB REM545BM223AAAA is frequently deployed in high-capacity industrial environments:

• Oil & Gas: Protection of large compressor and pump motors in refineries.
• Water Treatment: Management of high-power pumping stations and intake motors.
• Mining & Metals: Control of heavy-duty conveyor drives and mill motors.
• Power Generation: Supervision of auxiliary motors within thermal and hydroelectric plants.

 

Product Usage Instructions

The terminal should be flush-mounted into a control panel or rack. Before energizing, ensure the CT (Current Transformer) and VT (Voltage Transformer) ratios are correctly configured within the software settings to match the field hardware. All secondary circuits from CTs must be short-circuited before the terminal is removed from its case to prevent high-voltage hazards. Use the CAP505 or PCM600 software tool for logic configuration and setting parameters. Regularly inspect the terminal’s disturbance recorder data to analyze motor start-up profiles and identify potential stress points in the machinery.

Q&A: Frequently Asked Questions

Q: What does the “BM223AAAA” suffix indicate in the model number? A: This specific string defines the hardware configuration, including the type of power supply, the number of digital inputs/outputs, the communication hardware installed, and the language/software version.

Q: Does this unit support differential protection? A: Yes, the REM545 series supports stabilized and instantaneous differential protection, which is essential for detecting internal faults in larger motors.

Q: Can I monitor the motor’s temperature directly? A: The terminal features RTD (Resistance Temperature Detector) inputs or can receive temperature data via optional analog input modules to provide thermal supervision of bearings and windings.

 

Recommended Similar Models

For different protection scales or alternative ABB terminal architectures, consider these models:

1. ABB REM615: A more modern, IEC 61850-native motor protection relay.
2. ABB REF542plus: A versatile feeder terminal for protection and control.
3. ABB RET541: A specialized transformer terminal within the same RE500 family.
4. ABB REC523: A remote control terminal designed for automation and monitoring.
5. ABB REX521: A compact feeder protection relay for basic distribution tasks.