9905-387 Woodward ProAct Driver Datasheet & Technical Manual
Manufacturer: Woodward
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Part Number: 9905-387
Condition：New with Original Package
Product Type: Actuator Driver Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Woodward 9905-387 ProAct Governor System
Configured for load sharing and speed control in industrial engines and generators, the Woodward 9905-387 (9905-387 ProAct Driver Model III) provides direct physical/electrical execution of actuator position loop command processing and fuel rack regulation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 9905-387 |
| Brand | Woodward |
| Origin | United States |
| Weight | 0.95 kg (2.09 lbs) |
| Dimensions | Standard enclosure form factor for ProAct Model III series |
| Operating Temp | -40 to +85 deg C |
| Power Consumption | Input Current dependent on drive load; nominal execution logic |
| Input Voltage | 18 to 32 VDC |
| Output Voltage | 0 to 3 VDC control signal vector |
| Current Range | 0 to 200 mA position loop execution current |
| Processing Core | Integrated Digital Signal Processing (DSP) architecture |
| Communication Ports | Multi-port network routing interfaces |
Actuator Loop Feedback Response and Thermal Heat Sink Dissipation
The 9905-387 micro-processor evaluates actuator loop feedback response using integrated Digital Signal Processing (DSP) matrices to execute steady-state speed control. Real-time driver loop computation continuously regulates the 0 to 200 mA output current channel to position the bi-directional external electric actuator without hydraulic pressure aids. High-load switching phases dissipate systemic heat energy via engineered thermal heat sink dissipation profiles, preventing junction temperature failures while preserving timing constants across the multi-port industrial communication channels.
Frequently Asked Questions
Q: How does the internal driver circuit adapt when input power sags below the 18 VDC operating parameter?
A: The onboard voltage diagnostic monitor tracks input line levels. If input voltage drops below 18 VDC, the driver initiates an under-voltage fault routing that restricts output current to the actuator, clamping the 0 to 3 VDC control loop to a low-power standby state until electrical baseline conditions normalize.
Q: What actions prevent high-frequency electrical feedback from shifting the 0 to 200 mA control profile?
A: The module relies on differential analog inputs and isolated trace shielding to suppress high-frequency induction. Internal low-pass filtering limits structural signal noise from altering the digital speed regulation calculations processed within the DSP core.
Q: Can the 9905-387 driver handle direct mounting on high-vibration engine blocks?
A: No. While the remote ProAct actuator is rated for direct engine placement, the 9905-387 driver housing must be fixed to a structural sub-panel or control cabinet backplate to shield the micro-electronics from continuous low-frequency mechanical vibration.
Field Installation Guidelines
- Cabinet Mechanical Fastening: Mount the driver housing vertically onto a rigid sub-panel using heavy-gauge hex bolts. Ensure the structural plane provides a vibration-damped foundation to maintain physical alignment of internal connections.
- Grounding Connection: Terminate a heavy-gauge copper earthing conductor from the primary frame ground point directly to the central switchgear ground array to lower electromagnetic stray currents across the communication buses.
- Signal Cable Shielding Rules: Use twisted, fully shielded pairs for the 0 to 200 mA position command and 0 to 3 VDC output connections. Ground the shield at the driver chassis end only to block structural circulating current loops.
- Separation of Power Lines: Keep all 18 to 32 VDC power lines in dedicated wiring paths separate from low-power analog inputs and serial network connections to minimize high-voltage transient coupling.