GE IS200 Series Modules: IS200EHPAG1AFD

Technical Dossier

Product Details And Specifications

GE IS200 Series Technical Notes

The Evolution of IS200 Architecture

The IS200 module family was introduced as part of the Mark VI control system in the mid-1990s, succeeding the earlier Mark V (IS200 predecessor boards used in TCCA/TCDB racks). The Mark VI platform standardized on VME-based backplane architecture with dedicated IONET and ARCNET communication buses, enabling deterministic real-time control loops at sub-10ms cycle times.

Early IS200 revisions (suffix A, B) established the base electrical specifications. Subsequent revisions (C, D) addressed field-reported EMI susceptibility issues and improved conformal coating for high-humidity environments. By the mid-2000s, GE transitioned long-term support to the Mark VIe platform (IS420 series), which introduced Ethernet-based IONet replacing the legacy coaxial ARCNET topology. As a result, the entire IS200 series entered a mature/end-of-active-production phase. GE ceased new manufacturing of most IS200 boards circa 2010–2015, making third-party refurbished and surplus inventory the primary sourcing channel for ongoing maintenance. Compatibility between IS200 revisions requires careful attention: firmware version on the UCCE/UCCA controller must match the board revision table published in GEH-6421 (Mark VI System Guide).

IS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked IS200 series modules. Classified by functional category:

Excitation & Power Electronics

• IS200EHPAG1AFD: High-power exciter amplifier board; drives field current in brushless excitation systems.
• IS200EPBPG1A: Exciter power bridge protection board; monitors bridge firing and fault conditions.
• IS200EACFG2A: AC feedback conditioning board; processes generator terminal voltage and current signals.
• IS200EDEXG1A: Digital excitation control board; executes AVR and PSS algorithms in closed-loop excitation.
• IS200EPDMG1A: Exciter power distribution module; routes DC bus power to downstream excitation boards.
• IS200EPCTG1A: Exciter protection and control terminal board; interfaces field breaker and crowbar circuits.
• IS200EPSMG2A: Exciter power supply module; provides regulated DC rails to IS200 excitation rack.

I/O & Signal Conditioning

• IS200ERIOH1A: Redundant I/O terminal board; provides field wiring termination for analog and discrete signals.
• IS200BPIIH1A: Bipolar input interface board; conditions ±10V analog inputs for Mark VI processor.
• IS200ESELH1A: Signal selector board; implements median-select voting logic for redundant sensor inputs.
• IS200ECTBG1A: Control terminal board; primary field I/O termination for Mark VI VCMI/VCRC modules.
• IS200EDCFG1A: DC feedback conditioning board; processes DC bus voltage and current feedback signals.
• IS200EISBH1A: Isolated signal buffer board; provides galvanic isolation for high-voltage analog inputs.

Control & Processing

• IS200EXAMG1A: Exciter application module; hosts application-specific control logic for EX2100 excitation systems.
• IS200EMCSG1A: Motor control signal board; interfaces speed and position feedback from turbine-driven auxiliaries.
• IS200EGDMG1A: Gate drive module; generates PWM firing pulses for thyristor/IGBT power bridges.

Quality Control for the IS200 Range

IS200 boards present specific test challenges due to their multi-layer PCB construction, ARCNET/IONET bus transceivers, and mixed analog-digital signal paths. DriveKNMS applies the following test protocol to all IS200 modules prior to shipment: