Description
| Product model | IS200TREGH1BDB, also known as 338A549G1B |
| Manufacturer | GE (General Electric) |
| Product category | TMR Regulator Processor Board |
| Control system | Mark VIe Turbine Control System |
| Function | Primary control and protection processor |
| CPU | Dual-core processor (specific model proprietary) |
| Memory | Configured for high-speed control algorithms and event logging |
| Bus interface | High-speed TMR backplane links (fiber-optic or copper) |
| Operating voltage | +3.3 VDC and +5 VDC (from Mark VIe chassis backplane) |
| I/O interfaces | TMR communication ports, synchronization signals, diagnostic outputs |
| Operating temperature | -25°C to +70°C |
| Storage temperature | -40°C to +85°C |
| Mounting | Standard 19-inch rack, Eurocard 6U form factor (233 mm × 160 mm) |
| Environmental rating | Designed for industrial control cabinets, EMI and vibration resistant |
Product introduction
The GE IS200TREGH1BDB (also identified by part number 338A549G1B) is a high-integrity TMR (Triple Modular Redundant) Regulator Board designed for use in GE’s advanced Mark VIe Turbine Control System, the successor to the Mark VI and Mark V platforms. As a central processing unit within the control cabinet, the GE IS200TREGH1BDB executes real-time control logic for gas and steam turbines, managing critical functions such as speed regulation, load control, temperature monitoring, and emergency protection sequences.
Engineered for maximum reliability, this board operates within a triple-redundant architecture where three identical IS200TREGH1BDB units run in parallel, continuously comparing outputs and voting to ensure fault-tolerant operation. If one regulator fails, the other two maintain control without interruption—ensuring turbine safety and plant availability. The 338A549G1B is fully compatible with GE’s Profibus, Modbus, and Ethernet-based communication networks and integrates seamlessly with I/O modules, HMI systems, and condition monitoring tools used in modern power plants.
GE IS200TREGH1BDB
Core advantages and technical highlights
Triple Modular Redundancy (TMR) for maximum uptime
The GE IS200TREGH1BDB is a core element of the Mark VIe’s fault-tolerant design. Three IS200TREGH1BDB boards execute the same control logic simultaneously, with a voting mechanism that detects and isolates any discrepancies—eliminating single points of failure.
High-performance dual-core processing
Equipped with a powerful dual-core CPU, the 338A549G1B delivers fast execution of complex control algorithms, enabling precise regulation of turbine speed, fuel flow, and exhaust temperature—even under rapidly changing load conditions.
Real-time turbine protection
The GE IS200TREGH1BDB continuously monitors critical parameters such as vibration, overspeed, flame detection, and bearing temperature. Upon detecting an anomaly, it triggers immediate protective actions, including fuel shutoff and trip sequencing, to prevent equipment damage.
Seamless integration with Mark VIe ecosystem
The IS200TREGH1BDB works in concert with other Mark VIe components such as IS200TVPDHx (Valve Position), IS200LVPROx (Vibration Monitor), and IS200SCCExx (Communication) boards, ensuring cohesive system-wide control and diagnostics.
Advanced diagnostics and health monitoring
Each 338A549G1B provides comprehensive self-diagnostics and status reporting via the Mark VIe HMI, allowing operators to proactively identify potential issues before they lead to failures.
Wide operating range and rugged design
Rated from -25°C to +70°C, the GE IS200TREGH1BDB performs reliably in extreme industrial environments, including offshore platforms, desert power stations, and remote generation sites.
Direct replacement and upgrade path
The IS200TREGH1BDB replaces earlier versions like the IS200TREGH1ADB, offering improved firmware stability, enhanced security features, and better long-term support.
Typical application scenarios
The GE IS200TREGH1BDB is deployed globally in power generation facilities as the primary control processor for Frame 5, 6, 7EA, 7FA, and 9F gas turbines. In combined cycle plants, the 338A549G1B manages the start-up sequence, synchronization to grid, and load ramping of multiple turbines, ensuring efficient and stable power output.
In cogeneration and district heating systems, the GE IS200TREGH1BDB regulates steam extraction and exhaust temperature, optimizing thermal efficiency while maintaining electrical output. Its ability to integrate with BMS (Boiler Management Systems) makes it ideal for hybrid energy plants.
In oil & gas applications, the IS200TREGH1BDB controls pipeline compression turbines, where uninterrupted operation is critical for maintaining flow and pressure. Its TMR architecture ensures continued operation even during hardware faults, minimizing production loss.
The 338A549G1B is also used in nuclear auxiliary systems and renewable hybrid plants, where turbine control must meet stringent safety and reliability standards. Its compatibility with digital twins and predictive maintenance platforms enables smart plant operations.
GE IS200TREGH1BDB
Related model recommendations
- GE IS200TREGH1ADB (338A549G1A): Predecessor regulator board, replaceable byIS200TREGH1BDB for improved performance.
- GE IS200TVPDH1BDB (338A550G1B): TMR Valve Position Driver Board, works alongsideIS200TREGH1BDB for fuel valve control.
- GE IS200LVPRO1HBD (338A551G1B): Vibration Monitor Board, integrates with338A549G1B for comprehensive turbine protection.
- GE IS200SCCERxseries: Communication Interface Boards, enable IS200TREGH1BDB connectivity to HMI and SCADA.
- GE IS200PSDCH1BDB: Power Supply Distribution Board, provides regulated power toIS200TREGH1BDB in Mark VIe rack.
- GE IS200ICAEH1BDB: I/O Communication Adapter, linksIS200TREGH1BDB to remote I/O and field devices.
- GE IS210PWRISX: Mark VIe Power Supply Module, essential for powering the entire control cabinet.
- GE IS200TVRCH1BDB: TMR Voltage Regulator Board, complementsIS200TREGH1BDB in generator excitation control.
Installation, commissioning and maintenance instructions
Installation preparation: Before installing the GE IS200TREGH1BDB, ensure the Mark VIe control cabinet is powered down and locked out. Handle the 338A549G1B by the edges to avoid ESD damage. Align the board with the guide rails and insert it firmly into the designated TMR slot (typically R, S, or T core). Secure with front panel screws and verify fiber-optic TMR cables are properly connected.
Commissioning steps: Power up the cabinet and monitor the IS200TREGH1BDB status LEDs (RUN, TMR OK, FAULT). Use the Mark VIe Workstation or ToolboxST to confirm the board is recognized, synchronized, and running the correct application code. Perform a system health check and verify control signals to I/O modules.
Maintenance suggestions: Regularly inspect the GE IS200TREGH1BDB for dust accumulation and clean with compressed air if needed. Monitor system diagnostics for TMR mismatches, communication errors, or firmware warnings. Keep spare IS200TREGH1BDB units on-site with pre-loaded configurations for rapid replacement.
