GE IS200 Series Modules | IS200ACLEH1BAA ACLEH1B

Technical Dossier

Product Details And Specifications

GE IS200 Series: Comprehensive Module Range and Technical Overview

The GE IS200 series is the core I/O and control module family of the GE Mark VI and Mark VIe Turbine Control System (TCS), one of the most widely deployed distributed control platforms in global heavy industry. Installed across gas turbine power plants, combined-cycle facilities, nuclear auxiliary systems, petrochemical refineries, and offshore platforms, the IS200 architecture provides deterministic real-time control with triple-redundant (TMR) and simplex configurations. The series remains the backbone of turbine control infrastructure at thousands of sites worldwide, with an installed base spanning OEM commissions from the 1990s through the 2010s. As the platform transitions into its extended lifecycle phase, sourcing genuine IS200 modules—both current and obsolete—has become a critical operational requirement for plant maintenance teams.

The Evolution of IS200 Architecture

The IS200 module family was introduced alongside the Mark VI TCS platform in the mid-1990s as GE's successor to the Mark V (IS200 predecessor boards used the IS215 and IS410 designations under earlier revisions). The Mark VI platform standardized on the VME-based IS200 backplane, enabling modular I/O expansion across controller racks. Key architectural milestones include:

• Mark VI (late 1990s–2000s): Original IS200 deployment. Simplex and TMR rack configurations. IONET and ARCNET communication buses. Modules communicate via dedicated backplane connectors with no hot-swap capability on most variants.
• Mark VIe (2005–present): Evolved architecture introducing Ethernet-based IONet (100 Mbps), distributed I/O packs (PPRO, PDIO), and backward compatibility with select IS200 modules via adapter racks. The IS200 series was extended with new variants (e.g., IS200EACFG, IS200EPCTG) to support the VIe platform.
• Mark VIeS (Safety System, 2010s): SIL 2/3-rated safety extensions using IS200-series hardware in dedicated safety racks, certified under IEC 61511.
• End-of-Production / Lifecycle Status: The majority of original Mark VI IS200 modules reached end-of-active-production between 2010 and 2018. GE (now GE Vernova) continues to offer limited new production on select VIe-compatible variants. The broader IS200 catalog is now primarily supported through authorized repair, remanufacturing, and surplus channels.

IS200 Full Catalog & Functionalities (SKU List)

The following represents a structured index of verified IS200 series module part numbers, classified by functional category. All SKUs listed are genuine GE Mark VI / Mark VIe platform components.

Controllers & Processors

• IS200VCMIH2C: Mark VI VME Controller Module, TMR-capable, primary CPU for turbine sequencing logic.
• IS200VCMIH2BAA: Variant of VCMIH2C with extended memory revision; used in later Mark VI controller racks.
• IS200EACFG1A: Mark VIe Application Controller, Ethernet IONet interface, replaces VCMI in VIe upgrades.
• IS200EPCTG1A: Mark VIe Process Controller, high-speed scan rate, used in gas turbine primary control loops.

Analog Input (AI) Modules

• IS200ACLEH1BAA / ACLEH1B: AC Line Entry module; conditions and filters AC voltage/current signals entering the Mark VI I/O rack. Provides surge protection and signal conditioning for generator terminal measurements.
• IS200VTURH1B: Turbine analog input module; processes thermocouple and RTD signals for exhaust temperature monitoring.
• IS200TRLYH1B: Analog input relay interface; bridges field analog signals to the VME backplane.
• IS200AEAAH1A: Analog input module, 16-channel, 4–20 mA / 0–10 V configurable, used in process variable acquisition.

Digital Input (DI) Modules

• IS200VSVOH1B: Digital input/output module for servo valve control; interfaces with hydraulic actuator position feedback.
• IS200DTURH1B: Digital turbine I/O module; handles discrete status signals from turbine auxiliaries (lube oil, cooling, vibration switches).
• IS200BICLH1A: Binary input module, 24 VDC/120 VAC configurable, 32-channel discrete input for plant status monitoring.

Digital Output (DO) / Relay Modules

• IS200TRPGH1B: Trip relay output module; provides hardwired trip signal outputs for emergency shutdown sequences.
• IS200VRTDH1C: RTD input and relay output combination module; used in temperature-based protective relay logic.
• IS200EDEXH1A: Digital output expansion module for Mark VIe distributed I/O packs.

Communication & Network Modules

• IS200VCRCH1B: VME communication and rack controller; manages ARCNET/IONET bus arbitration within the Mark VI rack.
• IS200ENETG1A: Ethernet gateway module; bridges Mark VIe IONet to plant DCS historian and HMI networks (Modbus TCP / OPC-DA).
• IS200IOCFG1A: I/O configuration module for Mark VIe distributed packs; stores rack topology and module addressing.

Power Supply Modules

• IS200VPWRH1MDD: VME rack power supply, 28 VDC output, supports full TMR I/O rack; redundant pair configuration standard in critical applications.
• IS200EPWRH1A: Mark VIe rack power entry module; conditions incoming 120/240 VAC to regulated DC bus for distributed I/O packs.

Sourcing Hard-to-Find & Obsolete IS200 Parts

DriveKNMS maintains a dedicated inventory program for IS200 series modules that have reached end-of-production status with GE Vernova. For plant operators running Mark VI systems beyond their original design life, the inability to source a single failed module—such as an IS200ACLEH1BAA or IS200VPWRH1MDD—can result in unplanned turbine outages with significant generation loss costs.

DriveKNMS addresses this through three sourcing channels: (1) Surplus new-in-box (NIB) stock acquired from decommissioned plant inventories and OEM overstock; (2) Professionally remanufactured modules restored to OEM specification with full functional test documentation; (3) Emergency exchange service with same-day dispatch for critical outage scenarios. All IS200 modules are shipped with serialized test reports and a minimum 12-month warranty against functional failure.

Quality Control for the IS200 Range

IS200 series modules present specific test challenges due to their VME backplane architecture, multi-layer PCB construction, and mixed analog/digital signal paths. DriveKNMS applies the following test protocol to all IS200 units processed through its facility:

• Backplane continuity verification: All VME P1/P2 connector pins tested for continuity and isolation against adjacent signals prior to power-on.
• Functional rack test: Modules are installed in a live Mark VI test rack running GE Toolbox software. Controller modules execute a full I/O scan cycle; I/O modules are exercised across their full input/output range using calibrated signal sources.
• Analog accuracy calibration: AI modules (including ACLEH1B) are verified against NIST-traceable reference standards. Offset and gain errors are documented and must fall within OEM specification (typically ±0.1% full scale).
• Communication bus test: ARCNET and IONet communication modules are tested for correct node addressing, packet error rate (<0.01%), and bus arbitration behavior under simulated multi-node load.
• Thermal burn-in: All repaired modules undergo 48-hour burn-in at 50°C ambient to screen for early-life component failures before shipment.