Mark VI Excitation Power Distribution | GE Fanuc IS200EPDMG1B
Manufacturer: GE Fanuc
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Part Number: IS200EPDMG1B
Condition：New with Original Package
Product Type: Power Distribution Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The GE IS200EPDMG1B (EPDM) serves as the central Exciter Power Distribution Module within the EX2100 Excitation Control System. This hardware provides the critical bridge between the raw AC supply and the sensitive control electronics of the Mark VI platform. The EPDM converts and conditions power to deliver a stable 28V DC nominal output, which it then distributes across multiple exciter control boards and auxiliary circuits. By acting as a centralized power hub, the IS200EPDMG1B ensures that every component in the excitation string receives clean, surge-protected energy, preventing system-wide instability or generator trips.
Condition: 100% Brand New, New Surplus in Factory Packaging.
Part Number Breakdown: IS200EPDM Series
GE alphanumeric coding identifies the functional group and hardware evolution of the module.
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IS200: Standard designator for GE industrial circuit board assemblies.
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EPDM: Identifies the Exciter Power Distribution Module functional group.
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G1: Functional Revision Group 1, defining the primary component set and power rating.
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B: Artwork Revision B, indicating updated PCB trace layouts for enhanced signal integrity.
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AA: Additional assembly variant codes (found on IS200EPDMG1BAA models).
Technical Specifications
The IS200EPDMG1B features rugged power conditioning components designed for 24/7 industrial duty cycles.
| Parameter | Specification |
| Manufacturer | General Electric (GE) |
| Function | Distribution of regulated DC power to exciter boards |
| Output Voltage | 28 V DC (Nominal) |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Protective Features | Overvoltage, Overcurrent, Short-circuit protection |
| Storage Temperature | -40°C to +85°C |
| Dimensions | 130 × 107 × 32 mm |
| Approximate Weight | 0.5 kg (1.1 lbs) |
| Humidity | 5% – 95% RH (Non-condensing) |
Engineering Advantages
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Stable Multi-Rail Distribution: The EPDM maintains voltage regulation across multiple output branches. This prevents the "voltage sag" that often occurs when high-demand auxiliary components activate, ensuring that the main excitation processor continues to receive steady 28VDC without interruption.
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Advanced Fault Isolation: Integrated overcurrent and short-circuit protection circuits monitor each output channel. If a downstream board fails or develops a short, the IS200EPDMG1B isolates that specific circuit. This prevents a localized hardware failure from pulling down the entire DC bus and forcing a catastrophic unit trip.
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Enhanced Power Conditioning: The module incorporates high-grade filtering stages to remove electrical noise and transients from the input supply. Clean power is vital for the EGPA (Gate Pulse) and EACF (Feedback) boards to ensure that the firing pulses and generator measurements remain accurate and free of jitter.
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Rack-Optimized Thermal Design: The PCB layout maximizes airflow around power-handling components. This design allows the module to operate at full current capacity in the ambient heat of an EX2100 cabinet (up to 60°C) without requiring additional forced-air cooling.
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Seamless Backplane Integration: Standardized GE connectors allow for secure, vibration-resistant mounting within the EX2100 rack. The mechanical design ensures that the power connections remain tight despite the constant low-frequency vibrations typical of a turbine hall.
FAQs
Q: How does the IS200EPDMG1B differ from the IS200AEPG power board?
A: While both involve power, the AEPG is primarily the source of the regulated power. The EPDM (IS200EPDMG1B) is the distribution hub. It takes that regulated power and manages the various branches, providing the necessary protection and isolation for the individual sub-modules in the EX2100 string.
Q: Is it safe to swap the EPDM module while the excitation system is energized?
A: No. We do not recommend "hot-swapping" power distribution modules. Removing the EPDM will cut power to the exciter control boards, which will cause an immediate loss of excitation and an emergency trip of the generator. Always perform replacements during a scheduled machine outage.
Q: What indicates a failure on the IS200EPDMG1B?
A: Failures usually trigger "Control Power Loss" or "28V Bus Under-voltage" alarms on the Mark VI HMI. Physical inspection may reveal tripped circuit breakers (if equipped externally) or blown onboard protective components.
Q: Does this module require software configuration?
A: No. The IS200EPDMG1B is a hardware-based power distribution module. Once installed and cabled correctly, it functions automatically within the electrical architecture of the EX2100 cabinet without requiring software parameter adjustments.