GE VMIVME-2120
GE VMIVME-2120
GE VMIVME-2120

GE IS200EXCSG1A | EX2100 Series Exciter Conduction Sensor Board for Generator Excitation

  • Brand: GE (General Electric)
  • Model: IS200EXCSG1A (Variant of IS200 Series)
  • Product Type: Exciter Conduction Sensor Board
  • Series: EX2100 (Generator Excitation Control Systems)
  • Core Function: Serves as a critical current detection interface in GE EX2100 excitation control systems, enabling precise measurement of bidirectional current flow in generator excitation circuits. It uses Hall Effect sensors to convert current signals into logical outputs for the VMEbus controller, ensuring reliable excitation control and generator stability.
  • Key Specs:
    • Bus Compatibility: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
    • Form Factor: Compact L-shaped PCB (150°C operating temperature, industrial-grade)
    • Input Signals: Bidirectional current (via two unidirectional Hall Effect sensors)
    • Output Signals: Logical high/low (above 11 V DC / below 1.2 V DC)
    • Isolation: Galvanic isolation (optocouplers, 1500 V AC channel-to-channel)
    • Power Supply: +12 V DC (from EGPA board, 0.3 W max)
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Description

IS200EXCSG1A: Product Overview​
The GE IS200EXCSG1A​ is a conduction sensor 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 “current gateway” between the generator excitation circuit (e.g., rectifier bridges) and the VMEbus controller, ensuring accurate detection of bidirectional current flow—critical for maintaining generator voltage stability and preventing overcurrent faults.
Role in Automation Systems:
Positioned as a core sensing component​ in EX2100 architectures, the IS200EXCSG1A performs two primary functions:
  1. Current Detection: Uses two unidirectional Hall Effect sensors (facing opposite directions) to measure bidirectional current in the excitation circuit. When a magnetic field (generated by current flow) exceeds the sensor threshold, a logical low output is triggered.
  2. Signal Transmission: Sends processed logical signals to the IS200EMIO Exciter Main I/O Board​ (EMIO) via the EGPA board. These signals are used by the VMEbus controller to adjust excitation current, ensuring generator terminal voltage remains within acceptable limits.
Core Functionality:
  • Hall Effect Sensing: Employs two unidirectional Hall Effect sensors to detect current flow direction and magnitude. This design ensures accurate measurement of both positive and negative current (e.g., during generator startup/shutdown).
  • Logical Output: Converts current signals into logical high/low outputs (compatible with VMEbus standards). Logical high (>11 V DC) indicates no current flow, while logical low (<1.2 V DC) indicates current flow above the sensor threshold.
  • Galvanic Isolation: Uses optocouplers to isolate the sensor circuit from the VMEbus controller, protecting sensitive electronics from voltage spikes and electromagnetic interference (EMI) in harsh industrial environments.
  • Rugged Design: Industrial-grade components and a compact L-shaped form factor enable 24/7 operation in high-temperature (up to 150°C) environments (e.g., power plant generator halls).

    GE VMIVME-2120

    GE VMIVME-2120

Platform Benefits (EX2100 Series):
The IS200EXCSG1A 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., EGPA, EMIO, EPCT), reducing the cost of system upgrades.
  • Scalability: Supports expansion with additional sensor boards to accommodate growing system demands (e.g., adding more rectifier bridges for large generators).
Technical Specifications​
  • Model Number: IS200EXCSG1A (Variant of IS200 Series)
  • Manufacturer: GE (General Electric)
  • Product Type: Exciter Conduction Sensor Board
  • Series: EX2100 (Generator Excitation Control)
  • Form Factor: L-shaped PCB (150°C operating temperature, corrosion-resistant terminations)
  • Bus Standard: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
  • Input Channels: 2 unidirectional Hall Effect sensors (bidirectional current detection)
  • Output Channels: 2 logical outputs (to EMIO board via EGPA)
  • Isolation: Galvanic isolation (optocouplers, 1500 V AC channel-to-channel)
  • Power Supply: +12 V DC (from EGPA board, 0.3 W max)
  • Operating Temperature: -10°C to +150°C (14°F to 302°F)
  • Storage Temperature: -25°C to +85°C (-13°F to 185°F)
  • Humidity: 5–90% non-condensing
  • Weight: Approximately 0.2 kg (0.44 lbs)
  • Certifications: CE, UL (inferred from GE industrial product standards)
Core Features & Customer Value​
1. Accurate Current Detection:
The IS200EXCSG1A’s Hall Effect sensors provide precise measurement of bidirectional current flow, ensuring the VMEbus controller receives reliable data for excitation control. For example, in a power plant, the board can detect overcurrent conditions (e.g., during a short circuit) and trigger the EMIO board to reduce excitation current, preventing generator damage.
2. Reliable Signal Transmission:
Galvanic isolation and VMEbus compatibility ensure accurate signal transmission from the sensor to the controller, even in electrically noisy environments. This reliability is critical for maintaining generator stability and preventing unplanned downtime.
3. Rugged Industrial Design:
The board’s operating temperature range (-10°C to +150°C) and compact L-shaped 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 EX2100 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.

GE VMIVME-2120

GE VMIVME-2120

Typical Applications​
The GE IS200EXCSG1A​ is widely used in industrial automation systems for:
  1. Power Generation:
    • Detects current flow in generator excitation circuits (e.g., rectifier bridges) for real-time excitation control, ensuring stable power output.
  2. Manufacturing:
    • Used in industrial turbines (e.g., for compressed air, steam) to monitor excitation current, ensuring safe and efficient operation.
  3. Petrochemical Industry:
    • Controls excitation systems for generators in chemical plants, ensuring safe and efficient operation in hazardous environments.

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