Woodward 8404-4005 ProAct Digital Plus Speed Controller
Manufacturer: Woodward
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Part Number: 8404-4005
Condition：New with Original Package
Product Type: Speed Controllers
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Country of Origin: GERMANY
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Woodward 8404-4005 ProAct Digital Plus Speed Controller
Configured for precise engine speed governing and throttle position control in industrial power generation and mechanical drive systems, the Woodward 8404-4005 (8404-4005 ProAct Digital Plus Speed Controller) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
| Part Number | Actuator Type | Throttle Bore | Rated Torque | Operating Voltage |
|---|---|---|---|---|
| 8404-4005 | Integrated Bi-Directional Actuator | 36 mm | 0.34 Nm | 10-32 VDC |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 8404-4005 |
| Brand | Woodward |
| Origin | USA |
| Weight | 1.1 kg (2.44 lbs) |
| Dimensions | Standard 36 mm throttle bore body footprint |
| Operating Temp | -40 to +105 deg C |
| Power Consumption | 2.5 A maximum continuous draw |
| Control Voltage Range | 10-32 VDC |
| Actuator Motor Technology | Limited Angle Torque (LAT) motor |
| Mechanical Travel | Rotary throttle actuation |
| Rated Torque | 0.34 Nm |
| Control Type | Fully programmable digital speed governing |
Actuator Loop Feedback Response & Speed Control
The integrated Limited Angle Torque (LAT) motor delivers fast actuator loop feedback response to damp engine speed deviations caused by immediate load steps. Because the bi-directional drive eliminates mechanical return spring hysteresis, the controller enforces exact throttle plate positioning through high-frequency digital loops. Furthermore, internal thermal heat sink dissipation profiles prevent thermal drift during continuous 2.5 A current cycles across the 10-32 VDC operating voltage band.
Frequently Asked Questions
Q: How does the digital architecture alter loop stability compared to legacy analog governor units?
A: Digital control loops allow exact tuning of proportional, integral, and derivative parameters via software, eliminating analog potentiometer drift and improving transient speed recovery during full-load acceptance.
Q: What power supply considerations apply to the 10-32 VDC operating range?
A: The internal power stage accepts wide DC input variance, maintaining full rated torque (0.34 Nm) even during engine cranking conditions where battery voltage drops significantly.
Q: Does the 36 mm integrated throttle plate require external mechanical linkages?
A: No, the throttle plate mounts directly on the rotary shaft driven by the bi-directional LAT motor, eliminating mechanical backlash and reducing total installation complexity.
Field Installation Guidelines
Mount the unit directly to the engine intake manifold using high-temperature gasket materials to prevent vacuum leaks. Ensure the 36 mm throttle bore aligns perfectly with the intake runner to prevent air turbulence and mechanical jamming. Ground the controller enclosure to the engine block via a short, heavy-gauge braided ground strap to establish a solid equipotential frame.
Route all power and signal wiring through dedicated twisted-shielded pairs, maintaining clear separation from high-voltage ignition leads and generator output cables. Terminate signal shields at the single point earth ground near the controller end to prevent ground loops. During initial power-up, verify that the 10-32 VDC supply lines provide continuous current capability up to 2.5 A without voltage dips, then set digital PID governing parameters according to engine manufacturer specifications.