Configured for ground leakage detection in the EX2100 Excitation Control System, the GE IS200EGDMH1ADE, also cataloged as the IS200EGDMH1ADE Exciter Ground Detector Module, provides direct monitoring of field-to-ground resistance across both ac and dc sides of the generator field circuit. It is a double slot, double height (6U) board mounted in the Exciter Power Backplane rack (EPBP), receiving signals from the EXAM attenuator module via a nine-conductor cable.
Hardware Specifications
Model: IS200EGDMH1ADE
Brand: General Electric
Origin: United States
Dimensions: 8.26 cm high x 4.19 cm
Operating Temp: -30 to 65 deg C
Number of Channels: 12
Input Span: 4-20 mA
Technology: Surface Mount
Common Mode Voltage Range: ±5 V
Maximum Lead Resistance: 15 Ω
Analog Output Current: 0-20 mA
Form Factor: Double slot, double height (6U)
Mounting: Exciter Power Backplane rack (EPBP)
Manual Reference: GEI-100467
Backplane Bus Communication Velocity
The module integrates with the EX2100 backplane using deterministic bus communication. Signal transfer from the EXAM attenuator module is routed through a nine-conductor cable, ensuring stable propagation delay. Firmware flash compatibility is supported, enabling synchronized upgrades across EGDM boards without interrupting ground detection functionality.
Frequently Asked Questions (FAQ)
Q: Can the IS200EGDMH1ADE be replaced while the system is energized? A: No. The module requires system de-energization before removal. Hot-swap is not supported.
Q: How does redundant installation affect backplane current load? A: Installing three EGDM modules in a redundant configuration increases current draw, but the EX2100 rack design accommodates the load within rated capacity.
Q: Is firmware upgrade possible without removing the module? A: Yes. Firmware flash compatibility allows in-rack upgrades via the system backplane when the excitation system is in maintenance mode.
Field Installation Guidelines
Mount the module securely in the EPBP slots with full connector engagement.
Route the nine-conductor EXAM interface cable with shielding to minimize noise.
Verify insulation integrity of ground sense resistor wiring before energization.
Maintain conductor bending radius to avoid mechanical stress.
Confirm isolation between ac and dc sides of the generator field circuit during installation checks.
