GE IS200 Modules

Technical Dossier

Product Details And Specifications

GE IS200 Series: Comprehensive Module Range and Technical Overview

The GE IS200 series represents the primary I/O, control, and protection module family deployed within GE's Mark VI Turbine Control System and EX2100 Excitation Control System. These platforms are installed across heavy industrial sectors globally — including gas turbine power generation, combined-cycle plants, nuclear auxiliary systems, petrochemical refineries, and offshore oil & gas facilities. The IS200 series forms the backbone of distributed control architectures where high-availability, deterministic response, and long service life are mandatory requirements. Installed base spans hundreds of sites across North America, Europe, the Middle East, and Asia-Pacific, with many units operating continuously for 15–25 years.

The Evolution of IS200 Architecture

The IS200 series was introduced alongside the Mark VI platform in the mid-1990s as GE's successor to the Mark V control system. Early IS200 modules used VME-based backplane communication with proprietary IONet (Ethernet-based) and ARCNET protocols for inter-module data exchange. The architecture was designed around triple-redundant (TMR) and simplex (S) configurations, allowing critical turbine protection loops to tolerate single-card failures without process interruption.

Through the 2000s, GE expanded the IS200 catalog to support the EX2100 excitation platform, adding dedicated exciter I/O, ground fault detection, and field flashing modules. Firmware revisions introduced compatibility with GE's Toolbox software suite for configuration and diagnostics. By the 2010s, many IS200 variants entered the mature/end-of-production phase as GE transitioned newer installations toward the Mark VIe platform. However, the installed base of Mark VI and EX2100 systems remains extensive, and IS200 modules continue to be required for maintenance, emergency replacement, and life-extension programs through the 2030s.

Compatibility note: IS200 modules are not directly interchangeable with IS215 (Mark VIe) or IS420 series modules. Backplane connector pinouts, firmware, and communication protocols differ between generations.

IS200 Full Catalog & Functionalities (SKU List)

Exciter & Ground Detection Modules

• IS200EGDMH1AFG: Exciter ground detector module, field ground fault detection for EX2100 excitation systems
• IS200EGDMH1A: Exciter ground detector module, base revision, EX2100 platform
• IS200EACFG1A: Exciter AC feedback module, three-phase AC voltage/current sensing for exciter control loops
• IS200EDCFG1A: Exciter DC feedback module, DC bus voltage and current measurement for field excitation
• IS200ECTBG1A: Exciter control terminal board, interface between exciter power electronics and IS200 control modules

Turbine I/O & Terminal Boards

• IS200TREGH1B: Turbine regulation terminal board, analog and discrete I/O interface for Mark VI turbine control
• IS200TTURH1B: Turbine terminal board, universal I/O routing for Mark VI simplex and TMR configurations
• IS200TBCIH1C: Terminal board for contact inputs, 24 VDC discrete input interface, Mark VI
• IS200TBCOH1C: Terminal board for contact outputs, relay-driven discrete output interface, Mark VI
• IS200TBAIH1C: Terminal board for analog inputs, 4–20 mA and ±10 V signal conditioning
• IS200TBAOH1C: Terminal board for analog outputs, 4–20 mA output drive for final control elements
• IS200TRLYH1B: Relay output terminal board, high-current relay contacts for trip and alarm circuits

Communication & Processor Modules

• IS200VCRCH1B: VME communications and redundancy controller, IONet Ethernet arbitration for TMR Mark VI systems
• IS200VCMIH1B: VME communications module, primary IONet interface card for Mark VI controller racks
• IS200BICLH1B: Bus interface and clock module, system clock distribution and backplane bus arbitration

Power Supply Modules

• IS200EPSMG1A: Exciter power supply module, regulated DC power for EX2100 exciter control electronics
• IS200VPWRH1B: VME power supply module, 5 VDC and ±12 VDC backplane power for Mark VI controller racks

Sourcing Hard-to-Find & Obsolete IS200 Parts

A significant portion of the IS200 catalog has been discontinued by GE (now part of GE Vernova / Emerson depending on product line). OEM lead times for remaining new-production units frequently exceed 20–40 weeks, and many part numbers are no longer manufactured. DriveKNMS maintains a dedicated inventory program for IS200 lifecycle support, covering the following supply scenarios:

• New surplus stock: Factory-sealed units sourced from decommissioned projects and authorized distributor overstock
• Tested used / refurbished: Units removed from service, fully tested against OEM functional specifications before resale
• Emergency exchange: Same-day or next-day dispatch for critical plant outage situations
• Long-term supply agreements: Reserved inventory contracts for operators managing multi-unit fleets of Mark VI or EX2100 systems

DriveKNMS cross-references all IS200 part numbers against revision suffixes (e.g., H1A, H1B, H1C, AFG) to ensure hardware and firmware compatibility with the customer's installed system revision.

Quality Control for the IS200 Range

IS200 modules incorporate complex VME backplane connectors, multi-layer PCBs, and proprietary ASICs that require specialized test procedures beyond standard bench power-on checks. DriveKNMS applies the following test protocol to all IS200 units processed through its facility:

• Backplane continuity test: Full pin-by-pin verification of VME P1/P2 connector integrity before module insertion
• Powered functional test: Module installed in a live Mark VI or EX2100 test rack; IONet communication, I/O channel response, and LED status verified against OEM diagnostic criteria
• Insulation resistance test: Hi-pot testing on analog I/O channels to verify field-side isolation from logic-side circuitry
• Firmware revision verification: EPROM or flash firmware version confirmed and documented; mismatched firmware flagged before shipment
• Thermal burn-in: 24-hour powered operation at elevated ambient temperature to screen latent component failures
• Final inspection and packaging: ESD-safe packaging, revision label verification, and certificate of test issued with each unit