Description

The WOODWARD 9907-1183 is a high-precision SPM-D Series Actuator Driver Module engineered for critical motion control applications in turbine and engine management systems. As part of Woodward’s renowned SPM-D (Secondary Protection Module – Digital) family, this module delivers deterministic control of hydraulic actuators, enabling precise positioning of fuel valves, inlet guide vanes, or steam turbine governors. The WOODWARD 9907-1183 interfaces directly with Woodward’s 505/505XT or ProTech series controllers, converting speed/load control signals into proportional valve drive currents while executing real-time diagnostics. Its dual-channel architecture supports redundant control strategies, ensuring continuous operation during single-component failures. Designed for SIL 2/SIL 3 applications per IEC 61508, the WOODWARD 9907-1183 mitigates overspeed risks in power generation turbines by providing failsafe actuator response. Integration with Woodward ToolKit™ software simplifies configuration and condition monitoring, solidifying its role as a cornerstone in industrial safety systems.

WOODWARD 9907-1183

Technical Specifications

Main Features and Advantages

The WOODWARD 9907-1183 excels in operational safety through its dual-channel redundancy and advanced diagnostics. Each channel independently processes control signals, with continuous cross-comparison to detect discrepancies. Upon fault detection (e.g., signal loss, coil short), the module automatically switches to the healthy channel within 15 ms, preventing turbine overspeed events. Its ±200 mA output capability drives high-force hydraulic actuators without external amplification, reducing system complexity.

Enhanced precision is achieved via 16-bit digital-to-analog conversion and adaptive PID tuning, maintaining valve position accuracy within ±0.1% under load variations. The module’s hardened design withstands extreme environments, including unheated turbine enclosures and offshore platforms. Integrated Modbus RTU connectivity enables real-time monitoring of drive currents, temperatures, and fault logs through Woodward’s ToolKit™ interface. The WOODWARD 9907-1183 further features configurable failsafe states (hold/last position/zero) and surge-protected I/O circuits, ensuring predictable shutdown behavior during grid disturbances.

Application Field

The WOODWARD 9907-1183 is essential in industries requiring fail-safe turbine control. In combined-cycle power plants, it governs gas turbine fuel valves and steam turbine inlet actuators, synchronizing load response during grid frequency fluctuations. For compressor stations, the module prevents surge by precisely adjusting anti-surge valves based on real-time flow/pressure algorithms. Hydroelectric facilities deploy the WOODWARD 9907-1183 for governor control, regulating water flow to generators during sudden load rejection.

Marine applications leverage its ATEX compliance for engine control on LNG carriers, where it manages dual-fuel admission valves. In industrial cogeneration, the module orchestrates waste-heat recovery steam valves, optimizing energy capture. The WOODWARD 9907-1183 also serves critical safety functions in aerospace test stands, controlling fuel flow during jet engine endurance trials. Its deterministic response (<2>

WOODWARD 9907-1183

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WOODWARD ProTech GII: Overspeed protection system for turbine tripping

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WOODWARD SPM-D 9907-168: Enhanced version with SIL 3 certification