GE IS200 Series Modules

Technical Dossier

Product Details And Specifications

GE IS200 Series: Comprehensive Module Range and Technical Overview

The GE IS200 series constitutes the core I/O, processor, and communication module family deployed within GE's Mark VI Turbine Control System and EX2100 Excitation Control platform. These systems are installed across heavy industrial sectors globally — including gas turbine power plants, combined-cycle facilities, nuclear auxiliary systems, petrochemical refineries, and offshore oil & gas platforms. The IS200 series represents GE's transition from the earlier Mark V architecture to a fully distributed, VME-bus-based control topology, enabling deterministic real-time control with redundant communication backbones. Installed base estimates place Mark VI / IS200-based systems in tens of thousands of turbine units worldwide, making long-term parts availability a critical operational concern for plant engineers and maintenance managers.

The Evolution of IS200 Architecture

The IS200 series was introduced in the mid-1990s as the hardware backbone of the Mark VI control system, replacing the Mark V's rack-based analog I/O with a modular, digital-bus architecture. Early IS200 modules used a proprietary IONet (Ethernet-based) communication protocol operating at 10 Mbps, later upgraded to 100 Mbps in revised board revisions. The series is organized around a VME-form-factor backplane, with modules communicating via a dual-redundant IONet ring topology for fault-tolerant operation.

Key architectural milestones: the original VCMI (VME Communication Module Interface) was replaced by the VCMI-II in later Mark VI revisions; PPRO processor boards evolved from single-core DSP architectures to multi-channel configurations; and the I/O terminal board ecosystem expanded to support thermocouple, RTD, servo, proximity, and discrete I/O types. Compatibility between board revisions is revision-specific — mixing early (Rev A/B) and late (Rev D/E) boards within the same rack requires firmware alignment and is a common source of field integration errors. The IS200 series is now in the mature/end-of-life phase; GE has transitioned new installations to the Mark VIe platform, but IS200 hardware remains the dominant installed base for brownfield sites through at least 2035.

IS200 Full Catalog & Functionalities (SKU List)

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

Processor & Controller Boards

• IS200BPPBH2CAA: Mark VI VME processor board, primary control CPU with dual IONet ports
• IS200BPPBH1CAA: Mark VI VME processor board, single IONet port variant for simplex configurations
• IS200VPROH1BAA: VPRO processor module, high-speed DSP-based turbine protection controller
• IS200VCMIH2CAA: VME communication module interface, dual-redundant IONet ring controller
• IS200VCMIH1CAA: VME communication module interface, single IONet port variant

Analog I/O Modules

• IS200VAICH1CAA: Analog input module, 16-channel 4–20 mA / 0–10 V process signal acquisition
• IS200VAOAH1BAA: Analog output module, 8-channel 4–20 mA current output for valve and actuator control
• IS200ECTBH1CAA: Thermocouple input terminal board, 12-channel Type J/K/T/E/R/S/B thermocouple
• IS200ERTBH1CAA: RTD input terminal board, 12-channel Pt100/Pt1000 resistance temperature detector

Digital I/O Modules

• IS200VDIAH1BAA: Discrete input module, 24 VDC / 125 VDC contact input, 32-channel
• IS200VDOAH1BAA: Discrete output module, relay and transistor output, 16-channel
• IS200EDOAH1AAA: Enhanced discrete output terminal board, 24 VDC solid-state output

Communication & Network Adapters

• IS200VTURH1BAA: Turbine I/O terminal board, speed/proximity probe interface, 6-channel Bently Nevada compatible
• IS200EACFH1AAA: AC feedback terminal board, generator voltage and current sensing interface
• IS200VSVOH1BAA: Servo output module, 4-channel ±10 V / 4–20 mA electrohydraulic servo valve driver

Power Supply Modules

• IS200VPWRH1MCA: VME power supply module, 28 VDC regulated output for IS200 rack systems
• IS200EPSMH1AAA: External power supply module, 24 VDC field power distribution for I/O terminal boards

Sourcing Hard-to-Find & Obsolete IS200 Parts

Quality Control for the IS200 Range

IS200 modules present specific test challenges due to their VME backplane bus architecture, dual IONet communication stacks, and mixed analog/digital signal paths. DriveKNMS applies the following verification protocol to all IS200 inventory:

• Backplane bus integrity test: VME A24/D16 and A32/D32 bus cycle verification using dedicated VME analyzer hardware to detect address decode faults and data corruption on the backplane.
• IONet communication validation: Each VCMI and BPPB module is bench-tested for IONet packet transmission integrity at 10/100 Mbps, including ring redundancy switchover timing.
• Analog channel calibration: All VAIC and VAOA modules are calibrated against NIST-traceable references; channel-to-channel isolation is verified to >60 dB.
• Discrete I/O contact resistance test: Relay output modules are cycled 500 times minimum; contact resistance measured at <100 mΩ per channel.
• Thermal burn-in: Processor and communication modules undergo 48-hour burn-in at 55°C to screen early-life failures before shipment.
• Firmware revision verification: Board firmware is read and documented; customers are advised of revision compatibility with their existing Mark VI rack configuration.

For IS200 series sourcing inquiries, technical cross-reference, or emergency parts support:

• Email: [email protected]
• WhatsApp: +86 18359293191
• Web: driveknms.com