1. Product Overview

The Woodward 8516-039 is a high-performance electronic speed control module designed for governing internal combustion engines, gas turbines, and industrial prime movers. This module is part of Woodward's proven line of digital control products, delivering precise speed regulation and reliable operation in critical power generation and industrial applications.

Engineered for durability and ease of integration, the 8516-039 features a compact design, robust construction, and compatibility with a wide range of engine types, making it suitable for both stationary and mobile power systems.

2. Technical Specifications

• Supply Voltage: 10-32 VDC (nominal 24 VDC)
• Speed Sensing Input: Magnetic pickup (0-200 Hz) or hall effect sensor
• Control Output: 4-20 mA / 0-10 VDC (adjustable) or PWM signal
• Speed Regulation Accuracy: ±0.25% of set speed
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)
• Protection Rating: IP65 (enclosure) / IP20 (circuit board)
• Dimensions: 145mm (L) × 95mm (W) × 45mm (H)
• Mounting: DIN rail or panel mount (4-20 UNF threaded holes)
• Communication: Optional RS-485 (Modbus RTU) for remote monitoring/configuration

3. Installation & Setup

1. Mount the module in a vibration-damped location, away from extreme heat or moisture.
2. Connect the power supply to terminals marked +V (positive) and GND (ground), observing correct polarity.
3. Wire the speed sensor to the SENSE+ and SENSE- terminals (shielded cable recommended).
4. Connect the output signal to the engine actuator (verify actuator compatibility before connection).
5. Set the desired speed using the front-panel potentiometer or via software configuration.
6. Apply power and perform a functional test to verify speed regulation and output response.
7. Secure all wiring with strain reliefs to prevent damage from vibration or movement.

Important Safety & Maintenance Notes

- Installation must be performed by qualified personnel familiar with engine control systems.

- Disconnect all power sources before wiring or servicing the module.

- Do not exceed the maximum voltage/current ratings to prevent component damage.

- Perform quarterly functional checks and annual calibration to maintain performance.

- Keep the module free of dust and contaminants; avoid exposure to corrosive gases or liquids.

Document Revision: 3.0 | Date: January 2026 | Woodward, Inc. - Engine Control Systems Division

Part Compatibility: Compatible with Woodward 8500 series control systems | RoHS Compliant | UL Listed