GE IS200 Modules | IS200TVIBH2BCC Vibration Terminal Board

Technical Dossier

Product Details And Specifications

GE IS200 Series: Comprehensive Module Range and Technical Overview

The GE IS200 series represents the core I/O and control module family deployed within GE's Mark VI and Mark VIe Turbine Control Systems. These systems are installed across critical global heavy-industry infrastructure, including petrochemical refineries, nuclear power stations, combined-cycle gas turbine plants, and offshore oil & gas platforms. The IS200 series provides the hardware backbone for turbine protection, sequencing, excitation control, and condition monitoring. Its modular architecture allows plant operators to replace individual function boards without disturbing the broader control system, a key requirement for facilities operating under continuous-run mandates.

The Evolution of IS200 Architecture

The IS200 series was introduced alongside the Mark VI platform in the mid-1990s as GE transitioned from the earlier Mark V system (VMIPCI-based, VME bus) to a distributed I/O architecture using the IONet communication protocol. Early IS200 boards used a parallel backplane interface; later revisions migrated to a serial IONet (Ethernet-based) topology used in the Mark VIe platform. This transition introduced dual-redundant and triple-redundant (TMR) configurations, where three identical I/O boards vote on signal validity to prevent spurious trips. Boards from the IS200 series are not directly interchangeable between Mark VI and Mark VIe without firmware and termination board verification. End-of-life notices for several IS200 variants were issued between 2015 and 2022, making long-term spare parts sourcing a primary operational concern for plant maintenance teams.

IS200 Full Catalog & Functionalities (SKU List)

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

Vibration & Condition Monitoring

• IS200TVIBH2BCC: Vibration terminal board; interfaces proximity probes and accelerometers to the Mark VI/VIe control system for shaft and bearing monitoring.
• IS200VTURH2B: Turbine vibration input module; processes raw vibration signals from Bently Nevada-compatible transducers.
• IS200VSVOH1B: Servo valve output module; drives electrohydraulic servo valves for turbine inlet control.

Analog I/O Modules

• IS200AAIAH1A: Analog input module; 16-channel, 4–20 mA process signal acquisition for temperature and pressure loops.
• IS200AAOAH1A: Analog output module; 8-channel, 4–20 mA output for valve positioners and actuators.
• IS200ATAIH1A: Thermocouple analog input module; supports J, K, T, E, R, S, B type thermocouples with cold junction compensation.

Digital I/O Modules

• IS200DAIAH1A: Digital input module; 24 VDC discrete inputs for limit switches, pressure switches, and relay contacts.
• IS200DAOAH1A: Digital output module; relay-based discrete outputs for solenoid valves and motor starters.
• IS200EDCFH1A: DC power filter board; conditions 28 VDC bus power for downstream I/O modules.

Communication & Network Adapters

• IS200ENEGH2A: Ethernet network interface card; provides IONet connectivity between Mark VIe controllers and I/O packs.
• IS200EPCTG1B: PCIe communication board; used in Mark VIe HMI workstations for controller-to-HMI data exchange.
• IS200STCIH1A: Serial communication interface; supports Modbus RTU and DNP3 protocols for legacy SCADA integration.

CPU & Controller Modules

• IS200UCVEH2A: Mark VIe controller board; primary processing unit for turbine sequencing and protection logic execution.
• IS200UCVLH1B: Simplex controller module; single-redundancy configuration for balance-of-plant applications.
• IS200TRLYH1C: Relay output terminal board; interfaces controller relay outputs to field wiring for trip and alarm circuits.

Power Supply Modules

• IS200EPSMH1A: Power supply module; converts 120/240 VAC to regulated 28 VDC for Mark VI I/O bus distribution.
• IS200EPDMH1A: Power distribution module; distributes conditioned DC power across multiple I/O racks in large turbine control panels.

Sourcing Hard-to-Find & Obsolete IS200 Parts

A significant portion of the IS200 series has been formally discontinued by GE Vernova (formerly GE Gas Power). OEM lead times for remaining active part numbers frequently exceed 26 weeks due to semiconductor supply constraints and low-volume production runs. DriveKNMS maintains a dedicated inventory of tested IS200 surplus and refurbished modules sourced from decommissioned turbine control panels globally. For obsolete part numbers no longer listed in GE's active catalog, DriveKNMS provides lifecycle extension support including cross-reference analysis, functional equivalency assessment, and long-term consignment stocking agreements. Plant operators requiring multi-year maintenance contracts for IS200-based Mark VI systems are encouraged to contact DriveKNMS to establish a dedicated spare parts buffer aligned with their planned outage schedules.

Quality Control for the IS200 Range

IS200 modules present specific testing challenges due to their multi-layer backplane connectors, IONet communication stacks, and onboard FPGA firmware. DriveKNMS applies a structured inspection and functional test protocol to all IS200 units prior to dispatch. Each board undergoes visual inspection for capacitor degradation, connector pin damage, and PCB trace corrosion — failure modes common in modules removed from high-humidity turbine enclosures. Functional testing is performed using GE-compatible test fixtures that simulate IONet communication handshakes and verify analog/digital channel accuracy against factory calibration tolerances. Modules with onboard firmware are verified for revision compatibility with the target Mark VI or Mark VIe system version. All tested units are issued a test report and shipped with ESD-protective packaging rated for international freight.