GE IS200WETCH1ABA Control Board: Mark VI IS200 Series

Technical Dossier

Product Details And Specifications

GE IS200 Series Technical Notes

The GE IS200 series represents the core I/O and control module family of the GE Mark VI Turbine Control System — one of the most widely deployed distributed control platforms in global heavy industry. Installed across gas turbine power plants, combined-cycle facilities, petrochemical refineries, offshore platforms, and nuclear auxiliary systems, the Mark VI / IS200 architecture has maintained a dominant installed base since its commercial introduction in the mid-1990s. The IS200 module family handles all critical functions within the Mark VI TMR (Triple Modular Redundant) and simplex configurations: analog and digital I/O, turbine protection, communication, power distribution, and processor control. Facilities operating GE Frame 6, Frame 7, Frame 9, and LM-series gas turbines rely on IS200 modules as the primary interface between field instrumentation and the control backbone.

IS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the GE Mark VI IS200 series. Each entry reflects a distinct functional role within the control architecture:

IS200WETCH1ABA: Ethernet communication and I/O termination board for Mark VI rack interface
IS200VTURH1BBA: Turbine protection and speed sensing I/O terminal board
IS200VAICH1D: Analog input terminal board, 16-channel, 4–20 mA / voltage input
IS200VAOAH1BAA: Analog output terminal board, 8-channel, 4–20 mA output
IS200VDICH1C: Digital input terminal board, 24 VDC discrete input, 32-channel
IS200VDOAH1BAA: Digital output terminal board, relay and transistor output, 16-channel
IS200ECTBH1A: Ethernet communication terminal board, dual-port, IONet interface
IS200EPCTG1A: Ethernet PCIe communication card for Mark VI processor module
IS200TRPGH1BEC: Triple redundant protection module, TMR voting logic board
IS200PSCDH1A: Power supply and conditioner distribution board, 28 VDC output
IS200VCMIH2C: VME communication interface module, ARCNET / IONet bridge
IS200VSVOH1BAA: Servo valve output terminal board, ±10 V / 4–20 mA, 4-channel
IS200VPWRH1BAA: Rack power distribution board, internal bus voltage regulation
IS200VRTDH1C: RTD input terminal board, 16-channel, PT100 / PT1000 compatible
IS200VTCCH1A: Thermocouple input terminal board, 16-channel, J/K/T/E type
IS200VSPAH1A: Speed and acceleration input board, magnetic pickup / proximity probe
IS200VPROH1B: Processor module, Mark VI main CPU, dual redundant configuration
IS200EXHSG2AEB: Excitation system I/O terminal board, generator control interface
IS200EACFG1AAA: Excitation AC feedback terminal board, voltage and current sensing