ABB CMA126
ABB CMA126 - Image 2

ABB CMA126

Product Brief Introduction

CMA126 is a high-performance core main control module developed by ABB for power plant generator set Advant DCS distributed control system, responsible for centralized operation logic calculation, analog signal acquisition processing and interlock protection logic execution of generator unit auxiliary equipment, with high anti-interference performance adapting to strong electromagnetic environment of power station control room.

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Category: SKU: ABB CMA126

Description

ABB CMA126

 

Technical Specifications & Performance Parameters

  1. Core Hardware Performance: Dual-core industrial processor, main frequency 2GHz; 8GB DDR4 industrial grade anti-vibration RAM; 512GB wide temperature SSD solid-state storage
  2. Network Interface Configuration: Dual independent Gigabit Ethernet electrical ports for DCS system redundant network communication
  3. Signal Processing Capacity: Support 64-channel analog signal real-time parallel sampling, sampling frequency 100Hz
  4. Power Supply Standard: 24VDC industrial DC power supply, power consumption maximum 150W
  5. Environmental Working Index:
    • Operating temperature range: -20°C ~ +60°C
    • Storage temperature: -40°C ~ +85°C
    • Anti-vibration standard: IEC 60068-2-6 industrial vibration grade
  6. Protection Grade: IP20, dedicated DCS cabinet rack installation
  7. Isolation Performance: All external signal channels 1500VAC electrical isolation to resist power station electromagnetic interference
  8. Certifications: IEC 61508 SIL2 safety level certification, CE, power industry anti-electromagnetic interference standard certified

 

Function Characteristics

  1. Dual-core redundant processing architecture, automatic fault switching of main and standby cores to ensure uninterrupted generator control logic operation
  2. Large-capacity solid-state storage, long-term storage of unit operation historical data, fault event records and curve data
  3. Dual redundant Gigabit Ethernet network interface, realize hot backup communication with upper DCS operator station and lower signal terminal boards
  4. Built-in generator protection logic algorithm library, directly execute overcurrent, overvoltage, overspeed interlock protection calculation
  5. Real-time high-speed parallel sampling of multi-channel analog signals, support thermocouple, RTD, 4–20mA power station standard sensor signals
  6. Complete self-diagnosis function, real-time monitor processor, memory, storage, network and power supply operating status, upload fault alarm to DCS monitoring system
  7. Support offline program download and online hot modification of control logic without stopping generator unit operation

 

Material Composition

  1. Outer casing: Thickened aluminum alloy integrated shell, internal honeycomb heat dissipation structure, electromagnetic shielding cavity
  2. Main control circuit board: Multi-layer anti-interference FR4 high-temperature PCB, full-board gold-plated circuit
  3. Storage component: Wide temperature industrial SSD, shock-absorbing fixed bracket structure
  4. Network interface: Industrial grade shielded Gigabit Ethernet RJ45 connectors with surge protection circuit
  5. Internal heat dissipation: High-speed silent temperature-controlled cooling fan + aluminum alloy heat sink composite heat dissipation system

 

Structural Features

  1. Standard DCS rack plug-in width 8U module, sliding rail drawer type installation structure, convenient extraction maintenance
  2. Dual redundant power supply input terminals on the rear panel, support two independent 24VDC power supply hot backup
  3. Front panel equipped with multi-group LED status indicators, display power, network, running, fault, main/standby status
  4. Built-in anti-vibration buffer rubber pad between internal components and shell, adapt to power station unit vibration environment
  5. Rear panel centralized wiring terminals, classified power, signal, network interface partition layout to avoid crosstalk

 

Working Principle

  1. After power-on self-diagnosis completes, the main core processor loads generator control logic program stored in SSD
  2. Receive analog signal data collected by CMA series terminal boards through DCS backplane bus, carry out filtering, compensation and engineering value conversion calculation
  3. Execute generator closed-loop control and protection interlock logic, output control instructions to field actuator terminal boards
  4. Transmit real-time unit operating data to upper DCS operator station through dual redundant Gigabit Ethernet network
  5. Continuously monitor the operating state of hardware components; once main core fails, automatically switch to standby core within 10ms to maintain continuous control

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