GE IS200 Series Modules: IS200TSVCH1ACB

Technical Dossier

Product Details And Specifications

GE IS200 Series Technical Notes

The GE IS200 series represents the core I/O and control 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 generation, combined-cycle plants, nuclear auxiliary systems, petrochemical refineries, and offshore oil & gas platforms. The Mark VI platform, introduced in the mid-1990s as the successor to the Mark V, standardized on the IS200 module form factor for all signal conditioning, I/O termination, communication, and power distribution functions. Installed base estimates place Mark VI systems in thousands of generating units worldwide, with many facilities operating well beyond the original 20-year design lifecycle. As a result, the IS200 series has transitioned from an active product line into a critical long-term maintenance and spare parts category.

The Evolution of IS200 Architecture

The IS200 module architecture was engineered around GE's VME-based backplane and the IONet communication protocol, a deterministic Ethernet derivative designed for real-time turbine control. Early IS200 modules (circa 1995–2002) used through-hole PCB construction with discrete analog front-ends. Mid-generation revisions (2002–2010) introduced surface-mount components, improved EMI shielding, and revised firmware to support expanded diagnostic capabilities via the Mark VI Toolbox software environment. Late-generation IS200 modules (post-2010) incorporated conformal coating as standard and added compatibility with the Mark VIe architecture, which migrated from VME backplane to Ethernet-based distributed I/O. Compatibility between IS200 modules and Mark VIe controllers is partial and hardware-revision-dependent; substitution requires verification against GE Engineering Instruction (EI) documentation. GE formally announced end-of-active-manufacture for the majority of IS200 series modules between 2015 and 2020, shifting support to the Mark VIe IS420 and IS410 module families. However, the installed base of Mark VI systems ensures continued demand for IS200 spare parts through at least 2035.

IS200 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced modules within the GE IS200 series, organized by functional category:

Turbine Signal Conditioning & Control Boards

• IS200TSVCH1ACB: Turbine supervisory I/O terminal board for vibration, eccentricity, and speed signal conditioning in Mark VI systems.
• IS200TSVCH1ABB: Earlier hardware revision of the TSVCH1 board; functionally equivalent with minor PCB layout differences.
• IS200TRLYH1BCC: Relay output terminal board providing 16 discrete relay contacts for trip and alarm circuits.
• IS200TRLYH1ACC: Relay output terminal board, revision A; used in early Mark VI installations for protective relay interfacing.
• IS200TBCIH1C: Contact input terminal board; 24 VDC discrete input acquisition for turbine protection logic.
• IS200TBCIH1B: Earlier revision contact input board; pin-compatible with IS200TBCIH1C in most applications.

Analog I/O & Signal Processing

• IS200TBAIH1C: Analog input terminal board; 16-channel, 4–20 mA and ±10 V input ranges for process variable acquisition.
• IS200TBAIH1B: Analog input terminal board, revision B; predecessor to the H1C with identical channel count.
• IS200TBQCH1B: Thermocouple input terminal board; 16-channel cold-junction-compensated acquisition for exhaust temperature monitoring.
• IS200TBQCH1C: Revised thermocouple board with improved cold-junction compensation accuracy and conformal coating.
• IS200TBAOH1C: Analog output terminal board; 8-channel, 4–20 mA output for valve positioner and actuator control.

Communication & Network Adapters

• IS200EDIOH1A: Ethernet distributed I/O interface board; bridges legacy IS200 I/O to Mark VIe IONet Ethernet backbone.
• IS200EPCTG1A: Ethernet patch panel and communication termination board for IONet segment management.
• IS200BICLH1A: Bifurcated I/O communication link board; supports redundant IONet path configuration in triple-redundant (TMR) Mark VI systems.

Power Supply & Distribution

• IS200JPDFG1A: Power distribution fuse board; provides fused 28 VDC distribution to IS200 I/O terminal boards within the Mark VI panel.
• IS200JPDFG1B: Revised power distribution board with enhanced fuse monitoring and LED status indication.
• IS200TTURH1CBB: Turbine trip relay and undervoltage monitoring board; interfaces with the Mark VI protective relay logic for emergency shutdown.

Quality Control for the IS200 Range

IS200 series modules present specific test challenges due to their integration of analog front-ends, backplane bus communication, and firmware-dependent diagnostic behavior. DriveKNMS applies a structured test protocol to all IS200 units prior to shipment. Each board undergoes visual inspection for PCB delamination, capacitor bulge, corrosion on edge connectors, and solder joint integrity under 10× magnification. Functional testing is performed using GE Mark VI-compatible backplane test fixtures that simulate IONet communication and verify module enumeration, channel-level I/O response, and relay actuation timing where applicable. Analog channel accuracy is verified against NIST-traceable reference standards. Modules with conformal coating are inspected under UV light for coating integrity and re-coated where necessary. All test results are documented and accompany each shipment as a test certificate. Boards that fail any test parameter are quarantined and not offered for sale.