Description
IS200WNPSH1A – RTD terminal board is available in stock which ships the same day.
IS200WNPSH1A – RTD terminal board comes in UNUSED as well as REBUILT condition.
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IS200WNPSH1A Other names:
Turbine control processor IS200WNPSH1A
IS200WNPSH1A Turbo drive module
Gas turbine controller module IS200WNPSH1A
Product Description
IS200WNPSH1A is used as a servo control package. This component is manufactured by GE for its Mark VI or Mark VIe system. Both systems are used to control steam and gas turbine systems.
IS200WNPSH1A provides an electrical interface between one or two I/O Ethernet networks and the TSVO servo terminal board. IS200WNPSH1A uses the WSVO servo driver module to handle two servo valve position loops. PSVO has a front panel with multiple LED indicator lights. This includes four LEDs to indicate the status of two Ethernet networks (ENet1/Enet2), as well as one power and Attn LED, and two other LEDs labeled ENA1/2. There is also an infrared port in front, which is not used in this package.
After installation, IS200WNPSH1A will configure the control system toolbox application. This kit includes a processor board with an input power connector, local power supply, and an internal sensor for temperature monitoring. The board also has onboard flash memory and RAM. The board is connected to the acquisition board.
IS200WNPSH1A can be automatically reconfigured during replacement. This option can be enabled/disabled through the ToolboxST application through the component editor. The component editor also allows operators to manually reconfigure modules as needed. When replacing the terminal board, the I/O package must be manually reconfigured.
IS200WNPSH1A is a servo interface I/O package developed by GE under the Mark VIe control system. This I/O package is an electrical interface that can connect one or two I/O Ethernet networks to the TSVO servo terminal board. In order to manage the position rings of two servo valves, this component uses a WSVO servo driver module. The front panel of PSVO contains various LED indicator lights.
Four LEDs display the status of two Ethernet networks (ENet1/Enet2), as well as one power and Attn LED and two other LEDs called ENA1/2. There is also an infrared port in front, which is not used in this package. After installation, use the Control System Toolbox application to configure components. This package includes a processing board with an input power connector, local power supply, and internal temperature sensor. The board also has flash memory and RAM.
After replacing the circuit board, it can be automatically reconfigured. This option can be activated or disabled in the component editor of the ToolboxST application. If necessary, the operator can manually reconfigure the module using the component editor. After replacing the terminal board, the I/O package must be manually reconfigured. Manual operation of actuators
Mode, position slope, or step current can be used to test servo performance. The trend recorder will display any abnormal conditions during the actuator stroke.
For more information on this component and other circuit board components, installation and operation, as well as potential compatibility issues, please refer to the manufacturer’s user guide and manual.
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Positioning: This servo main control board, equipped with a power supply and signal conditioning daughter card, is installed on the back of the SVO servo main card. It specifically handles power supply and signal protection for electro-hydraulic servo valve drives and LVDT valve position feedback loops. It serves as the underlying signal board for servo control of fuel valves, main steam valves, and IGV guide vanes.
II. Core Functions (Core Support for Servo Valve Control)
Multi-channel isolated power supply for servo loops
Generates ±28V servo drive power and LVDT excitation AC power, providing stable power output to the main card IS200SVOIH1A/IS200SVOCH1A to drive various hydraulic servo valves in the steam turbine.
16-Channel Independent Fast-Fuse Overcurrent Protection Array
Built-in 16 miniature fast-fuses + varistors provide segmented short-circuit/overcurrent protection for each servo output, LVDT feedback, flame detection, and speed pulse circuit. Single-channel failure does not cause complete card shutdown.
Servo Signal Filtering and Surge Protection
Integrated EMI filtering and transient suppression devices filter interference from high-power contactors and inverters in the cabinet, preventing servo valve jitter and valve position feedback jumps.
Speed/Flame Detector Signal Conditioning
Compatible with MPU magnetoresistive speed probes and UV flame detector signal preprocessing, buffering weak pulse signals before sending them to the servo master card for overspeed and flameout logic judgment.
Backplane Bus Signal Conversion
48-pin P1 backplane connector interfaces with the SVO master card; dual JE1/JE2 external sockets connect to the IS200TSVOH1A terminal board (servo terminal board), enabling interconnection of valve drive, LVDT, and interruption signals. III. Key Electrical Hardware Parameters
Parameter Item Standard Specifications
Installation Form SVO servo master card back-mounted daughterboard, cannot be installed separately in rack slots
Input Power Supply Rack back panel DC24V
Output Power ±28V Servo drive maximum 400mA; LVDT AC excitation power supply
Protection Circuit 16 independent fast-fuse protection circuits
Connectors 48-pin back panel female connector P1, two JE external signal sockets
Operating Temperature -40℃ ~ +70℃
Storage Humidity 5%~95% Non-condensing
Dimensions and Weight Approx. 110×67mm, net weight 0.04kg
MTBF ≈410,000 hours, designed for long-term power plant operation
Matching Master Cards IS200SVOIH1A, IS200SVOCH1A (Mark VI servo master card)
Matching Terminal Board IS200TSVOH1A (Servo Valve Field Terminal Block)
IV. Differentiation from Other Versions in the Series
IS200WNPSH1A (First Generation)
Basic version, standard 16-channel fuses, compatible with early 7FA/9FA Mark VI unit servo cards.
IS200WNPSH1B (Upgraded Version)
Optimized filtering circuit, enhanced anti-interference, added channel disconnection diagnostic circuit, compatible with all original A version racks.
Suffixes AAA / ABA
These only represent the factory assembly batch and component manufacturer; hardware functions and pinouts are completely interchangeable.
V. Typical Application Scenarios
For use only with older GE Mark VI turbine control systems (distinguishing them from the newer Mark VIe):
Heavy-duty gas turbine 7FA, 9FA, 6FA fuel gas valves, IGV adjustable stationary vane servo drive circuits;
Low-level valve position feedback power supply for main steam valves and regulating valve electro-hydraulic servo valves in thermal power turbines;
Servo control cabinets for combined cycle power plants, self-owned power plants, and chemical-driven compressor units;
Using an SVO servo master card to achieve precise closed-loop valve position adjustment.
2. Typical Fault Points
Short circuit in a certain servo circuit → corresponding channel fast fuse blows, valve malfunction, no valve position feedback on the screen;
Aging and breakdown of the varistor, ±28V power supply pulls low, all servo valves jitter;
Oxidation and poor contact of the 48-pin connector on the backplane, loss of LVDT excitation, valve position feedback jumps;
Capacitor bulging and leakage, excessive output ripple, unit speed fluctuations.
3. Replacement Precautions
The entire SVO master card must be disconnected from the power supply before removing the WNPSH daughterboard on the back.
After replacement, verify the specifications of the 16-channel fuses, short-circuit test the servo circuit to ensure there is no short circuit, then power on.
No need to reinstall the logic; simply perform LVDT valve position zero-point calibration on-site.
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