General Electric IS200DSVOH1A

Technical Specifications

Advantages and Key Features

High-Resolution Actuator Control: The IS200DSVOH1A utilizes 16-bit digital-to-analog converters (DACs) on each of its 8 output channels, providing exceptional precision for fuel valve positioning and IGV control – critical for maintaining combustion stability and emissions compliance.

Complete Channel Isolation: Each output channel on the IS200DSVOH1A is galvanically isolated from others and from the backplane, preventing ground loops and ensuring reliable operation in electrically noisy turbine environments.

Individual Channel Diagnostics: The IS200DSVOH1A features per-channel fault detection, including open-circuit detection, short-circuit protection, and output deviation monitoring. Faults are reported to the main DSP processor (e.g., IS200DSPXH2C) for immediate protective action.

Software-Configurable Output Ranges: The IS200DSVOH1A supports both bipolar (±10V) and unipolar (0–10V) output configurations via software, eliminating the need for hardware jumpers and simplifying inventory management.

Redundancy-Ready: Dual IS200DSVOH1A boards can be configured in redundant pairs to eliminate single points of failure in critical actuator control paths, with automatic switchover upon fault detection.

Application Fields and Case Studies

The IS200DSVOH1A is used in GE Frame 6B/7E/9E gas turbine fuel valve control, steam turbine admission and extraction valve positioning, compressor IGV and blow-off valve actuation, and industrial process valve control. In a 500 MW combined-cycle plant, three IS200DSVOH1A boards were deployed to control gas turbine fuel valves, steam turbine admission valves, and bypass station valves. When one channel on a IS200DSVOH1A developed an open-circuit condition due to a field wiring fault, the board’s diagnostics immediately alerted the main IS200DSPXH2DBD processor, which transferred control to the redundant IS200DSVOH1A within 50 ms, avoiding an unplanned turbine trip.

Comparison with Competing Products

The IS200DSVOH1A offers superior isolation, faster update rates, and more comprehensive diagnostics compared to Siemens and Woodward alternatives. While ABB AO810 provides comparable resolution, the IS200DSVOH1A has a longer field-proven track record specifically in GE turbine control applications.

Selection Recommendations

Choose the IS200DSVOH1A for all Mark VI turbine actuator control applications requiring 8 analog voltage outputs. Use it as a replacement for failed IS200DSVOH1 or IS200DSVOH1B boards with full compatibility. Deploy redundant IS200DSVOH1A boards for critical fuel valve control to ensure single-fault tolerance. Pair the IS200DSVOH1A with IS200DSPXH2CAA or IS200DSPXH2DBD DSP processors for optimal system integration. Verify that your actuator requires voltage (not current) command signals; for 4–20 mA applications, consider GE’s DSOH current output boards instead. Ensure the Mark VI rack has adequate slot capacity and power budget before adding the IS200DSVOH1A.

Precautions and Important Notes

Always use ESD-safe handling procedures when installing the IS200DSVOH1A. Before connecting field wiring, verify that actuator inputs accept voltage signals and do not exceed ±10V. Never connect the IS200DSVOH1A outputs to current-loop devices without proper signal conditioning. Ensure the +5V and ±15V power supplies are within tolerance; out-of-spec voltages can affect output accuracy. When replacing a board, transfer configuration settings (output ranges, scaling parameters) from the old board to the new IS200DSVOH1A using ToolboxST. Document all channel-to-actuator wiring mappings before board removal to simplify reinstallation. Store spare IS200DSVOH1A boards in anti-static packaging and rotate inventory every 24 months. Consult GE application engineering if using the IS200DSVOH1A in high-EMI environments or with long field wiring runs (>300 meters).