GE IS200 Series Modules | IS200BPIBG1A Terminal Board

Technical Dossier

Product Details And Specifications

GE IS200 Series: Comprehensive Module Range and Technical Overview

The GE IS200 series constitutes the primary I/O, communication, and power module family for GE's Mark VI and Mark VIe Turbine Control Systems — the dominant distributed control platform deployed across gas turbines, steam turbines, and combined-cycle power plants globally. Installations span petrochemical complexes, nuclear auxiliary systems, LNG terminals, offshore platforms, and refinery utilities across North America, the Middle East, and Asia-Pacific. The IS200 designation covers a broad catalog of printed circuit board assemblies (PCBAs) that interface directly with the Mark VI VME-based controller backplane or the Mark VIe Ethernet-based I/O network. These modules are not interchangeable with IS200 boards used in EX2100 excitation systems without explicit cross-reference verification.

The Evolution of IS200 Architecture

The IS200 module family was introduced alongside the Mark VI platform in the mid-1990s as GE transitioned from the earlier Mark V (IS200 predecessor boards used VMEbus architecture with proprietary IONET serial communication). Mark VI IS200 boards operate on a triple-redundant (TMR) or simplex control architecture, with I/O boards communicating via the JetWay serial bus to the VCMI controller card. The transition to Mark VIe (circa 2005–2010) introduced Ethernet-based I/O (IONet over 100BASE-TX), requiring a new generation of IS200 boards with embedded Ethernet controllers — these are physically similar but electrically incompatible with their Mark VI predecessors. Field engineers must verify the board revision suffix (e.g., G1A, G1B, AEB) to confirm compatibility with the installed controller firmware version. As of 2026, the Mark VI platform is in the mature/end-of-active-production phase; GE has transitioned new projects to Mark VIe and Mark VIeS. However, the installed base of Mark VI systems remains extensive, and IS200 spare parts will remain in active demand for maintenance and life extension programs through at least 2035.

IS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced modules within the GE IS200 series. Modules are classified by functional category.

Terminal Boards & I/O Interface

• IS200BPIBG1A / IS200BPIBG1AEB: BPI terminal board; interfaces analog and discrete I/O signals to the Mark VI backplane via ribbon cable.
• IS200TBCIH1C: Contact input terminal board; 24-channel discrete contact input interface for turbine protection logic.
• IS200TBCIH1D: Revised contact input terminal board; updated conformal coating spec for high-humidity environments.
• IS200TRLYH1B: Relay output terminal board; 16-channel relay driver interface for solenoid and actuator control.
• IS200TBAIH1C: Analog input terminal board; 16-channel 4–20 mA / thermocouple input conditioning for process variables.
• IS200TBQCH1C: Speed/frequency input terminal board; magnetic pickup and proximity probe signal conditioning for turbine speed measurement.
• IS200TSVOH1B: Servo output terminal board; interfaces LVDT feedback and servo valve drive signals for fuel and IGV control.

Controller & Processor Modules

• IS200VCMIH2C: VCMI controller module; primary VME-based I/O communication manager for Mark VI simplex and TMR configurations.
• IS200VCRCH1B: VCRC redundancy controller; manages TMR voting logic and cross-channel communication in triple-redundant Mark VI systems.
• IS200ECTBG1A: Ethernet communication terminal board; provides 100BASE-TX IONet connectivity for Mark VIe I/O modules.

Power Supply Modules

• IS200EPCTG1A: Power converter terminal board; DC/DC conversion and power distribution for Mark VI I/O panel rails.
• IS200PSCDG1A: Power supply conditioning board; filters and regulates 28 VDC supply to I/O module backplane.

Communication & Network Adapters

• IS200STCIH1A: Serial communication interface board; RS-232/RS-485 gateway for legacy MODBUS RTU integration.
• IS200SRLYH1B: Redundant relay output board; dual-channel relay output with cross-monitoring for critical shutdown circuits.
• IS200VSVOH1B: VME servo output board; direct VMEbus-connected servo amplifier interface for high-speed valve positioning.
• IS200BICLH1B: Bipolar current loop board; 4–20 mA isolated current loop driver for remote transmitter excitation.

Sourcing Hard-to-Find & Obsolete IS200 Parts

GE ceased active production of the majority of Mark VI IS200 boards between 2015 and 2022. Procurement of these modules now depends entirely on the secondary market, authorized repair facilities, and specialist distributors. DriveKNMS maintains a dedicated inventory of IS200 series boards sourced from decommissioned turbine control panels, surplus OEM stock, and tested pull-outs. Each unit undergoes individual traceability documentation including board revision, firmware stamp (where applicable), and physical inspection record. For end-users operating Mark VI systems under long-term service agreements (LTSAs) or independent maintenance contracts, DriveKNMS provides: (1) direct replacement units for immediate dispatch, (2) exchange programs for core-return credit, and (3) consignment inventory arrangements for large fleet operators. Lead times for common IS200 boards are typically 1–5 business days from verified stock; rare or high-revision boards may require 2–4 weeks sourcing lead time.

Quality Control for the IS200 Range

IS200 series boards present specific test challenges due to their VMEbus backplane interface, proprietary JetWay serial protocol, and mixed analog/digital signal paths. DriveKNMS applies the following verification procedures to all IS200 units prior to dispatch: (1) Visual inspection under 10× magnification for solder joint integrity, capacitor condition, and conformal coating coverage; (2) Powered bench test using a Mark VI-compatible VME backplane simulator to verify backplane communication handshake and register read/write integrity; (3) Functional signal-path test for analog I/O boards — each channel is stimulated with calibrated 4–20 mA or thermocouple equivalent signals and output accuracy is verified against OEM specification tolerances; (4) Relay output boards are cycled through full contact closure/open sequences under rated load; (5) Final burn-in at elevated temperature (50°C, 4 hours) to screen for latent component failures. All test results are logged and shipped with each unit as a test certificate.