ABB COM0003 2RAA005844A0006A
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ABB COM0003 2RAA005844A0006A

Product Brief Introduction

This module belongs to ABB COM IEC dedicated communication series, specially developed for ABB AC800M distributed control system and power substation automation control platform. It acts as a dedicated protocol conversion and time synchronization gateway integrating RS485 serial bus and IRIG-B precision time synchronization signal interface, serving as the core data bridge between AC800M main controllers, power protection relays, field measuring instruments and upper SCADA monitoring systems. The fixed part code 2RAA005844A0006A represents the standard industrial wide-temperature commercial version without customized hardware modification.

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Category: SKU: ABB COM0003 2RAA005844A0006A

Description

ABB COM0003 2RAA005844A0006A

 

Technical Specifications & Performance Parameters

3.1 Physical Dimension & Weight

  • Overall size: 122mm Length × 25mm Width × 26mm Depth
  • Net weight: 170g
  • Rack occupation: Single-width slot of AC800M CPU backplane

3.2 Power Supply Performance

  • Rated input voltage: DC 24V, tolerance range -15% ~ +20%
  • Typical power consumption: 2.5W; maximum power consumption ≤3W under full-load communication
  • Built-in reverse polarity protection, overvoltage and overcurrent short-circuit protection circuit
  • Backplane power supply mode, no external independent power wiring required

3.3 Communication Interface Hardware Index

  1. RS485 Serial Bus Interface
    • Electrical isolation strength: 2500VAC optical isolation between bus and internal logic circuit
    • Supported baud rates: 9600, 19200, 38400, 57600, 115200 bps software configurable
    • Transmission mode: Full-duplex differential signal transmission
    • Maximum communication cable length: 1200m under 9600bps baud rate
    • Terminal matching resistor: Built-in 120Ω switchable bus termination resistor
  2. IRIG-B Time Synchronization Interface
    • Signal format: IRIG-B AC/DC amplitude modulation time code signal compatible
    • Time synchronization precision: ≤1μs microsecond-level clock calibration
    • Signal input isolation: 1500VAC isolation to avoid ground potential difference interference

3.4 Supported Communication Protocols

  • Power industry standard protocols: IEC 61850 MMS, IEC 60870-5-103, DNP3 serial version
  • General industrial serial protocols: Modbus RTU, Modbus ASCII, user-defined custom ASCII binary protocols

3.5 Data Transmission Capacity

  • Maximum input process data cache: 244 bytes
  • Maximum output process data cache: 244 bytes
  • Single bus maximum connectable slave devices: 99 addressable field nodes

3.6 Environmental Working Parameters

  • Continuous operating temperature range: -40°C ~ +70°C
  • Storage and transportation temperature range: -40°C ~ +85°C
  • Working relative humidity: 5% ~ 95%, non-condensing environment only
  • Vibration resistance standard: IEC 60068-2-6, 10–150Hz continuous vibration without signal loss
  • Shock resistance standard: IEC 60068-2-27, withstand 15g impact instantaneous load

3.7 Protection & Certification Standards

  • Shell protection grade: IP20, only for closed electrical cabinet internal installation
  • Safety certifications: CE, UL, IEC 61850-3 power communication standard, RoHS environmental compliance
  • EMC anti-interference compliance: IEC 61000-6-2 heavy industrial electromagnetic interference standard

3.8 Diagnostic Indicator Configuration

Front panel integrated 4 groups of independent LED status lamps: PWR power indicator, RUN running indicator, TX data sending indicator, RX data receiving indicator

 

Function Characteristics

  1. Dual integrated RS485 + IRIG-B composite interface, realize real-time field data transmission and whole-system precise time synchronization on one single module, reducing rack slot occupation and cabinet wiring quantity
  2. Full galvanic isolation design for all communication ports, thoroughly eliminate ground loop interference caused by inconsistent ground potential of multi-point field equipment, avoid communication frame loss and data distortion
  3. Multi-protocol adaptive parsing core, automatically identify and decode IEC 61850, IEC103, Modbus RTU and other mainstream power serial protocols without external protocol converter
  4. Microsecond-level IRIG-B time synchronization function, unify the clock of all connected protection relays, measuring instruments and PLC controllers, ensure consistent time stamp of fault recording and historical data for power accident analysis
  5. Built-in large-capacity data cache buffer, automatically store communication frame data during instantaneous bus fluctuation, prevent data packet loss under short-term signal interference
  6. Complete bus self-diagnosis system, real-time monitor bus short circuit, slave offline, baud rate mismatch, time signal loss faults, upload fault alarm codes to AC800M CPU system register
  7. Hot-swap compatible backplane hardware, module replacement can be completed without cutting off the whole DCS system power supply, no power outage interruption of power monitoring business
  8. Software configurable bus address, baud rate, protocol type and alarm threshold via ABB Control Builder M programming software, no DIP switch manual adjustment required
  9. Built-in ESD electrostatic discharge protection circuit at all wiring terminals, resist field static electricity generated by equipment maintenance operation
  10. Independent channel signal filtering algorithm, automatically filter power frequency harmonic interference of high-voltage power station environment, improve communication stability under strong electromagnetic noise

 

Material Composition

  1. Outer Module Housing: Black flame-retardant PA66 engineering plastic, anti-aging, impact-resistant and anti-static surface coating, integrated buckle locking structure for backplane fixing
  2. Main Control Circuit Board: Multi-layer high-temperature resistant FR4 copper-clad PCB, full-board gold-plated signal traces to reduce transmission resistance, tin-free anti-corrosion surface treatment
  3. Communication Processing Core: Industrial-grade dedicated serial protocol processing chip with wide-temperature operating range, encapsulated anti-interference packaging
  4. Isolation Components: High-withstand voltage optocoupler isolation modules for RS485 and IRIG-B ports, independent isolation loop for each signal channel
  5. Wiring Terminal Assembly: Orange nickel-plated copper alloy spring screw terminals, anti-loose spring gasket structure, classified power and signal wiring partition layout
  6. LED Indicator Components: High-brightness anti-interference industrial LED lamps, long service life without light attenuation under long-term cabinet operation
  7. Internal Heat Dissipation Structure: Integrated hollow air channel on PCB and shell, passive natural heat dissipation without cooling fan

 

Structural Features

  1. Ultra-slim single-width modular design, only occupy one independent communication slot of AC800M CPU backplane, greatly save cabinet rack space for multi-module expansion projects
  2. Front panel centralized layout of LED indicators and external wiring terminal row, convenient for on-site staff to observe communication status and wiring operation without disassembling rack components
  3. Quick buckle-type backplane locking mechanism, insert module from bottom and lock the top plastic buckle, one-hand disassembly without auxiliary tools
  4. Independent physical isolation cavity inside the circuit board, separate power supply circuit, RS485 communication circuit and IRIG-B time signal circuit to avoid mutual signal crosstalk
  5. All external wiring terminals are arranged on the lower front side of the module, convenient wiring construction without rear wiring space reservation
  6. Vibration buffer rubber pads between PCB and plastic shell, adapt to long-term vibration environment of generator room and substation switch cabinet
  7. Standardized gold-plated spring contact pins on backplane insertion end, maintain stable electrical connection under long-term mechanical vibration and temperature change

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