Woodward 9902-378

Digital guide

Product Name: ProAct Family Electric Actuator / 505E-Series Associated Control Module.

Product Overview: The 9902-378 falls within Woodward’s 9902 family, which spans the ProAct electric actuator line and the 505/505E turbine control system modules. Based on the closest verified 9902-family documentation, it functions as either an engine-mounted electric actuator with integral driver or as a signal-processing/conversion module within the 505/505E steam and gas turbine control architecture.

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Detailed content

Technical Specifications: (Derived from closest verified 9902-family platforms)

If ProAct actuator variant: 72.5° rotary output, 0.625-36 serrated shaft, analog 0–5 Vdc / 4–20 mA / CAN / PWM command inputs, integral driver, on-engine base or flange mount.
If 505/505E module variant: +24 VDC power (approx. 1 A), RS-232 / RS-422 serial ports, operating temperature -20 to +60 °C, storage temperature -40 to +85 °C, IP56 (NEMA 4X) enclosure, approx. 356 × 279 × 102 mm, weight approx. 4.13 kg.

Functional Features: High flexibility and scalability; programmable for specific application control; dual-mode operation (programming mode and run mode); menu-driven configuration; Modbus communication protocol support where applicable; optional redundant configuration; seamless integration with 505-series controllers.

Application Scenarios: Steam turbine and gas turbine speed control, load sharing, synchronization, and protection functions; diesel engine governing; compressor control; turboexpander control; power generation control system integration; fuel rack, timing, throttle, and wastegate positioning.

Material Composition: Metal enclosure (505 module variant) with front-panel status indicators and interface; rear multi-terminal wiring block; shared backplane bus with 505 series; industrial-grade electronic components.

Structural Characteristics: Standard 505-series module form factor in metal chassis (module variant); or on-engine mountable metallic actuator with central connector and mounting bracket (ProAct variant); front panel with status LEDs and operator interface.

Working Principle: As a 505/505E module, it receives sensor signals or commands from the main controller, performs signal conversion, amplification, and isolation, then outputs to field devices or uploads to the main controller. As a ProAct actuator, it accepts a position command and uses its integral driver to electronically position the output shaft in closed loop.

Installation Requirements: For 505-module variant: install inside a standard Woodward control cabinet; wiring per the corresponding wiring diagram; pay attention to termination matching on communication ports. For ProAct variant: mount on-engine per mechanical drawings; use shielded cable with proper grounding; configure and calibrate using the ProAct Service Tool.

Usage Notes: Specific I/O definitions must be confirmed against the drawing corresponding to the actual serial number — do not guess pin definitions from same-family models; after module replacement, reconfigure parameters; regularly check wiring tightness and heat dissipation status; the I/O definitions of the same family may differ between specific versions.