GE IS200 Series Modules: IS200VCRCH1BBB

Technical Dossier

Product Details And Specifications

GE IS200 Series Technical Notes

The GE IS200 series represents the core I/O, control, and communication module family deployed within GE's Mark VI and Mark VIe Turbine Control Systems. These systems are installed across global heavy industry sectors including petrochemical refineries, nuclear power stations, combined-cycle gas turbine plants, and offshore oil & gas platforms. The Mark VI platform, introduced in the mid-1990s, replaced the earlier Mark V architecture and established the IS200 module form factor as the standard for GE turbine control hardware. Installed base estimates place Mark VI and Mark VIe systems in thousands of facilities across North America, Europe, the Middle East, and Asia-Pacific, making IS200 series modules among the most widely maintained DCS spare parts in the industrial automation aftermarket.

The Evolution of IS200 Architecture

The IS200 module family was engineered to operate within GE's VME-based backplane architecture, using a proprietary high-speed serial bus (IONet) for inter-module communication. Early Mark VI deployments (circa 1995–2005) relied on the UCSC, VCMI, and VCRH board families for core I/O and communication functions. The transition to Mark VIe (circa 2006 onward) introduced Ethernet-based I/O communication via the ENET and IONET protocols, while retaining physical compatibility with many IS200-footprint modules through adapter boards.

Key architectural generations:

• Mark VI (IS200 Gen 1, 1995–2005): VME backplane, IONet serial bus, UCSC controller architecture. Modules in this generation include VCRH, VCMI, VTUR, VSVH, and VDSP families.
• Mark VIe (IS200 Gen 2, 2006–2018): Ethernet I/O, IONET protocol, expanded diagnostic capability. Introduced VCRC, VCMI1B, and VCRCH families.
• Mark VIeS (IS200 Gen 3, 2015–present): Safety-rated (SIL 2/3) variants, IEC 61511 compliance, expanded redundancy options.

Compatibility note: IS200 modules are not universally interchangeable across generations. Firmware revision, backplane slot assignment, and I/O configuration files (ToolboxST) must be verified before substitution. End-of-life (EOL) notices have been issued for multiple Gen 1 modules; however, GE continues to supply select replacement boards through its Parts & Repairs division, and the aftermarket supply chain remains active.

IS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked IS200 series modules. Classification follows functional role within the Mark VI/VIe control architecture.

Controllers & Processor Modules

• IS200VCRCH1BBB: VME controller card, Mark VI turbine control, redundant CPU module with IONet interface — the subject of this listing.
• IS200VCMIH2B: VME communication module, handles IONet serial bus master arbitration for Mark VI systems.
• IS200VCMIH2C: Revised revision C variant of VCMIH2B; improved EMI filtering and extended temperature tolerance.
• IS200VCRCH1B: Controller card, Mark VI, single-board revision B; predecessor to the BBB revision with identical pinout.
• IS200VSVOH1B: Servo valve output module; provides 4-channel ±100 mA servo drive output for hydraulic actuator control.

Digital I/O Modules

• IS200VDIH1B: 24-channel 24 VDC digital input module; used for discrete contact monitoring in turbine protection circuits.
• IS200VDOH1B: 16-channel 24 VDC digital output module; drives relay coils and solenoid valves in Mark VI I/O racks.
• IS200VDIH1C: Revision C digital input module; adds per-channel diagnostics and short-circuit detection vs. revision B.
• IS200VDOH1C: Revision C digital output module; enhanced current limiting and output status feedback.
• IS200VTURH1B: Turbine I/O module; integrates speed pickup inputs, flame detector inputs, and exhaust thermocouple channels.

Analog I/O Modules

• IS200VAICH1B: 16-channel analog input module; 4–20 mA / 0–10 V configurable, 12-bit resolution, used for pressure and temperature transmitter inputs.
• IS200VAOCH1B: 8-channel analog output module; 4–20 mA output, drives control valves and positioners in fuel and steam systems.
• IS200VRTDH1B: 16-channel RTD input module; supports Pt100/Pt1000 sensors, 3-wire and 4-wire configurations for bearing and exhaust temperature monitoring.

Communication & Network Modules

• IS200ENETIH1B: Ethernet interface module for Mark VIe; provides 100BASE-TX IONet connectivity for distributed I/O expansion.
• IS200VSPAH1B: Serial port adapter module; RS-232/RS-485 interface for legacy SCADA and historian integration.
• IS200VCMIH1B: VME communication interface, earlier revision; manages backplane arbitration in simplex Mark VI configurations.

Power Supply Modules

Quality Control for the IS200 Range

IS200 modules present specific test challenges due to their VME backplane interface, proprietary IONet serial protocol, and multi-layer PCB construction. DriveKNMS applies the following test protocol to all IS200 units prior to dispatch: