IS200EMIOH1AFB
IS200EMIOH1AFB

GE IS200EMIOH1AFB | EX2100 Series Exciter Main I/O Board for Generator Excitation Systems

  • Brand: GE (General Electric)
  • Model: IS200EMIOH1AFB (Variant of IS200 Series)
  • Product Type: Exciter Main Input/Output (I/O) Board
  • Series: EX2100 (Generator Excitation Control Systems)
  • Core Function: Serves as the central signal interface​ in GE EX2100 excitation control systems, enabling precise management of input/output signals between the exciter controller and external devices. It processes PT (Potential Transformer)/CT (Current Transformer) signals, contact inputs, relay outputs, and gate pulse commands, ensuring reliable communication and control within the excitation system.
  • Key Specs:
    • Bus Compatibility: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
    • Form Factor: Single-slot, double-height VME PCB (222 mm × 177 mm × 27 mm)
    • Input Signals: PT/CT signals, 16 optically isolated dry/wet contact inputs, 4–20 mA current inputs
    • Output Signals: 32 discrete relay outputs (4 isolated groups of 8), logic-level gate pulse signals (10–20 V DC adjustable)
    • Isolation: Galvanic isolation (optocouplers, 1500 V AC channel-to-channel)
    • Operating Temperature: -10°C to +60°C (industrial-grade ruggedness)
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Part number: IS200EMIOH1AFB
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Description

IS200EMIOH1AFB: Product Overview​
The GE IS200EMIOH1AFB​ is a main I/O board​ designed specifically for GE EX2100 series excitation control systems, a legacy platform renowned for its reliability in industrial power generation. As part of the EX2100 ecosystem, it acts as a “signal gateway” between field transducers (e.g., PT/CT transformers, contact switches) and the exciter controller, ensuring accurate signal transmission and real-time monitoring—critical for maintaining generator stability, efficiency, and safety.
Role in Automation Systems:
Positioned as the core I/O interface​ in EX2100 architectures, the IS200EMIOH1AFB performs two primary functions:
  1. Signal Acquisition: Receives raw signals from field devices (e.g., PT voltage signals, CT current signals, contact switch statuses) and converts them into a digital format suitable for the exciter controller.
  2. Signal Transmission: Sends processed signals to the exciter controller for real-time analysis (e.g., adjusting excitation current to maintain generator voltage) and routes control commands from the controller to field actuators (e.g., triggering trip relays for overcurrent protection).
Core Functionality:
  • VMEbus Compatibility: Conforms to VMEbus Rev. C.1, ensuring seamless integration with VME64 backplanes and controllers (e.g., GE Fanuc 90-30 series). This allows the board to work with existing EX2100 components without major system upgrades.
  • Flexible Signal Handling: Supports multiple signal types (PT/CT, contact inputs, 4–20 mA) through configurable input channels, making it adaptable to diverse field devices.
  • High Precision: Uses advanced signal processing algorithms to maintain signal integrity (error < ±0.1% full-scale), critical for generator voltage regulation and synchronization.
  • Rugged Design: Industrial-grade components and a compact form factor enable 24/7 operation in high-temperature, high-vibration environments (e.g., power plant generator halls).
Platform Benefits (EX2100 Series):
The IS200EMIOH1AFB inherits the EX2100 platform’s strengths, including:
  • Reliability: The EX2100 system is the industry standard for generator excitation control, with a proven track record of 24/7 operation in power plants worldwide.
  • Legacy Compatibility: The board is designed to work with existing EX2100 components (e.g., EPCT, ECTB, EACF boards), reducing the cost of system upgrades.
  • Scalability: Supports expansion with additional I/O modules to accommodate growing system demands (e.g., adding more PT/CT channels for large generators).

    IS200EMIOH1AFB

    IS200EMIOH1AFB

Technical Specifications​
  • Model Number: IS200EMIOH1AFB (Variant of IS200 Series)
  • Manufacturer: GE (General Electric)
  • Product Type: Exciter Main I/O Board
  • Series: EX2100 (Generator Excitation Control)
  • Form Factor: Single-slot, double-height VME PCB (222 mm × 177 mm × 27 mm)
  • Bus Standard: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
  • Input Channels: 16 optically isolated dry/wet contact inputs (1 ms time-stamping), 8 PT/CT signal inputs (3-phase voltage/current monitoring)
  • Output Channels: 32 discrete relay outputs (4 isolated groups of 8, 0.5 A at 12–24 V DC each), 2 logic-level gate pulse outputs (10–20 V DC adjustable)
  • Isolation: Galvanic isolation (optocouplers, 1500 V AC channel-to-channel)
  • Resolution: 12-bit (analog input), 10-bit (frequency input)
  • Accuracy: ±0.1% (full-scale, analog input), ±0.2% (frequency input)
  • Operating Temperature: -10°C to +60°C (14°F to 140°F)
  • Storage Temperature: -25°C to +85°C (-13°F to 185°F)
  • Humidity: 5–90% non-condensing
  • Weight: Approximately 0.65 kg (1.43 lbs)
  • Certifications: CE, UL (inferred from GE industrial product standards)
Core Features & Customer Value​
1. Reliable Signal Transmission:
The IS200EMIOH1AFB’s galvanic isolation and VMEbus compatibility ensure accurate signal transmission from field devices to the controller, even in electrically noisy environments. For example, in a power plant, the board can reliably measure generator terminal voltage (via PT signals) and transmit the data to the exciter controller, which adjusts the excitation current to maintain voltage stability.
2. Flexible Configuration:
Configurable input/output channels allow engineers to customize the board’s functionality for different field devices, reducing the need for additional signal conditioning hardware. This flexibility saves time and money during installation.
3. Rugged Industrial Design:
The board’s operating temperature range (-10°C to +60°C) and compact form factor make it suitable for harsh industrial environments. Its corrosion-resistant terminations extend the board’s lifespan, reducing maintenance costs.
4. Easy Integration:
VMEbus compatibility ensures seamless integration with existing VMEbus systems, minimizing downtime and effort during upgrades. This is invaluable for facilities with legacy VMEbus installations, allowing them to enhance system capabilities without replacing entire architectures.
Typical Applications​
The GE IS200EMIOH1AFB​ is widely used in industrial automation systems for:
  1. Power Generation:
    • Monitors generator terminal voltage and current (via PT/CT signals) for real-time excitation control, ensuring stable power output.
  2. Manufacturing:
    • Used in assembly lines to monitor the status of contact switches and sensors, enabling precise control of manufacturing processes.
  3. Petrochemical Industry:
    • Controls excitation systems for generators in chemical plants, ensuring safe and efficient operation in hazardous environments.

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