REM543 REM543BM212AAAA ABB Bailey Analog Input Module
Brand：ABB Model number：REM543 REM543BM212AAAA
Country of origin: Sweden Product weight：0.55KG
HS code：8517623990
Product Details：
Product Dimensions：
The REM543 is an integrated multifunctional terminal that combines protection, monitoring, and control into a single hardware platform. It is designed to handle the complex requirements of power plants and heavy industrial facilities. The unit features a sophisticated human-machine interface (HMI) with a graphic display, multiple programmable push-buttons, and status LEDs. Its modular architecture allows it to manage not only standard electrical faults but also machine-specific thermal and mechanical stress conditions. The "BM212AAAA" suffix indicates a specific hardware configuration involving the number of binary I/O, communication modules, and power supply voltage levels.
Input Channels: Typically supports up to 9 analog inputs for current (CT) and voltage (VT) measurement, or sensors like Rogowski coils and voltage dividers.
Binary I/O: Features 15 freely assignable binary inputs and 12 output relays for tripping, closing, and signaling.
Measurement Accuracy: Current and voltage measurement accuracy is typically within $\pm 1\%$ of rated values.
Power Supply: Wide-range auxiliary power supply supporting either $110-240 \text{ V AC/DC}$ or $24-60 \text{ V DC}$ (depending on the specific hardware variant).
Communication Protocols: Standard support for SPA, LON, and MODBUS RTU. Support for IEC 61850 is available through external adapters (like SPA-ZC 400).
Sampling Rate: Analog inputs are sampled at $2 \text{ kHz}$ (at $50 \text{ Hz}$ systems) or $2.4 \text{ kHz}$ (at $60 \text{ Hz}$ systems) for high-resolution waveform capture.
Environmental Protection: Front panel is rated for IP54, while the rear casing is rated for IP20.
Operating Temperature: Rated for operation between $-10\text{°C}$ and $+55\text{°C}$.
Integrated PLC Functions: The terminal includes a large library of programmable logic functions, allowing users to customize interlocking, automation sequences, and control logic without needing external controllers.
Comprehensive Machine Protection: It offers specialized functions such as start-up supervision, stall protection, cumulative start-up counters, and underexcitation protection, which are essential for large motors and generators.
Condition Monitoring: Beyond electrical protection, it monitors circuit breaker wear, travel time, and trip circuit continuity, enhancing the overall reliability of the power system.
Marine Certification: Many variants are certified for marine and offshore use, making them suitable for shipboard power systems and oil platforms.
Optical Communication: Uses optical fiber for communication ports to ensure fast, disturbance-free data transmission in high-interference industrial environments.
Lifecycle Status: The REM543 series is a legacy product and has been officially discontinued (reached "Classic" or "Limited" lifecycle phases). Support and spare parts may be restricted, and users should plan for migration to newer series like the REX640.
Configuration Complexity: Due to its advanced PLC capabilities, configuration requires specialized software (such as CAP501 or CAP505). Only trained personnel should modify protection settings or logic schemes.
Terminal Safety: Always ensure that current transformer (CT) secondary circuits are short-circuited before disconnecting the relay to prevent dangerous high-voltage transients.
Grounding: Proper earthing of the stainless steel chassis is mandatory to ensure EMI/EMC compliance and personnel safety.
The REM543BM212AAAA is widely utilized in sectors requiring high-reliability machine management:
Power Generation: Serving as the main protection for diesel, hydroelectric, and steam-driven generator units.
Heavy Industry: Protecting large MV (medium voltage) motors used in mills, crushers, and conveyors in mining and cement plants.
Water and Oil & Gas: Controlling and protecting high-capacity pumps, fans, and compressors.
Marine Systems: Integrated into the power management systems of large vessels and offshore platforms to supervise synchronous propulsion motors and onboard generators.
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