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GE IS200EDISG1A

Product Name:​ GE IS200EDISG1A – EX2100e/Mark VIe Exciter Digital Input/Output Terminal Board
Introduction:​ A digital I/O terminal board that serves as the dedicated hardware interface for digital input/output signal termination within GE’s EX2100e and Mark VIe exciter control platforms. It links discrete field circuits directly to the processing backbone and processes safety-critical shutdown triggers.
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Technical Specifications:
  • Manufacturer:​ GE Fanuc
  • Product Type:​ Digital I/O Terminal Board
  • Model:​ IS200EDISG1A (also cataloged as IS200EDIS Exciter Digital Input/Output Terminal Board)
  • Digital Inputs:​ 16 channels
  • Digital Outputs:​ 16 channels
  • Input Type:​ Dry-contact inputs, 24 V DC logic
  • Output Type:​ Relay / solenoid drivers (24–125 V DC)
  • Response Latency:​ < 1 ms for trip signals
  • Isolation:​ Galvanic isolation, channel-to-system and channel-to-channel
  • Backplane Power:​ 28 V DC nominal
  • Terminal Blocks:​ Accept wiring up to 2.5 mm² (14 AWG)
  • Operating Temperature:​ –40 °C to +70 °C
  • Dimensions:​ Approx. 28–30 cm width
  • Shipping Weight:​ 4.00 kg
Key Features:
  • High-speed response (< 1 ms) for critical trip signal transmission
  • 16 digital inputs + 16 digital outputs in a single board
  • Channel-to-system and channel-to-channel galvanic isolation for high-voltage transient immunity
  • Directly interfaces discrete field circuits to the EX2100e/Mark VIe processing backbone
Materials & Construction:​ Terminal board with DIN-rail or rack mounting; industrial terminal blocks rated for 2.5 mm² (14 AWG); chassis ground terminal for low-impedance connection to the protective earth busbar; designated shield-drain grounding bracket.
Working Principle:​ Discrete field signals (dry contacts) arrive at the terminal blocks, are conditioned and isolated, then transferred over the backplane bus to the exciter control processor. Output channels drive relays/solenoids (24–125 V DC) for trip, de-excitation, and lockout actions. The architecture ensures that safety-critical shutdown triggers are processed with minimal latency.
Application Scenarios:​ Exciter control and protection in gas turbine-generator units, steam turbine-generator units, and hydroelectric power plants.
Installation & Usage Notes:
  • Secure the assembly onto the cabinet DIN-rail or rack matrix. Establish a metal-to-metal low-impedance chassis ground connection directly to the master protective earth busbar.
  • Route low-voltage 24 V DC discrete input logic lines through separate physical wiring conduits, isolated from high-voltage 125 V DC solenoid output driver cables, to suppress capacitive cross-talk.
  • Land external shield drain wires exclusively at the designated grounding bracket on the terminal board frame. Do NOT ground both ends of the cable shield to avoid ground loops.
  • Use wire sizing up to 2.5 mm² (14 AWG) for robust physical connectivity.

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