1. Parameter Specifications

• Power Supply: The WOODWARD 9907 - 1177 typically operates on a 12 - 24V DC power supply. The power consumption is relatively low, around 8 - 12W, ensuring energy - efficient operation.
• Input/Output Configuration:
• Analog Inputs: It has 4 analog inputs. These inputs can accept signals in the ranges of 0 - 10V or 4 - 20mA, with a 14 - bit resolution for accurate measurement of physical quantities such as engine speed, temperature, and pressure.
• Analog Outputs: There are 2 analog outputs. They can output signals in the same ranges as the analog inputs, which can be used to control actuators like fuel valves or throttle controls.
• Digital Inputs: It features 8 digital inputs, which can receive binary signals from switches or sensors, with an input voltage range of 5 - 24V DC.
• Digital Outputs: There are 4 digital outputs, each capable of driving a load with a maximum current of 0.5A, suitable for controlling relays or indicator lights.
• Communication Interface: It supports serial communication, often using the RS - 232 or RS - 485 interface, and may also be compatible with Modbus RTU protocol for seamless data exchange with other devices.

2. Applications

• Engine Control: The WOODWARD 9907 - 1177 is mainly used for engine control in various applications, such as diesel engines, gas engines, and small - scale power generators. It can monitor engine parameters and adjust the fuel injection, ignition timing, or throttle position to optimize engine performance, fuel efficiency, and emissions.
• Industrial Machinery: In industrial machinery that uses engines as power sources, like construction equipment, agricultural machinery, and marine vessels, it can ensure stable and reliable operation of the engine under different working conditions.

3. Weight and Dimensions

• Weight: The unit weighs approximately 0.5 kg, which is relatively light and easy to install and handle.
• Dimensions: The overall dimensions are: length - 120mm, width - 80mm, height - 30mm. Its compact size allows for installation in limited - space environments, such as engine compartments or control cabinets.

4. Features

• Precise Control: With high - resolution analog inputs and outputs, it can provide precise control of engine parameters, ensuring optimal engine performance and reducing fuel consumption and emissions.
• Flexible Configuration: The combination of analog and digital inputs and outputs, along with its communication capabilities, allows for flexible configuration according to different engine types and application requirements.
• User - friendly Interface: It has an intuitive configuration interface, which simplifies the setup process for technicians and operators, reducing the time and effort required for commissioning.

5. Stability and Reliability

• Robust Design: The device is housed in a durable plastic enclosure that provides protection against dust, moisture, and minor mechanical vibrations. This ensures stable operation in harsh industrial and outdoor environments.
• Electrical Protection: It is equipped with over - voltage, over - current, and short - circuit protection for its inputs and outputs, safeguarding the device from electrical faults and extending its service life.
• Quality Assurance: WOODWARD is a well - known brand with strict quality control during manufacturing. The 9907 - 1177 undergoes rigorous testing to ensure long - term reliable performance.

6. Real - world Examples

• Diesel Generator Set: In a diesel generator set used for backup power in a commercial building, the WOODWARD 9907 - 1177 monitors the engine speed and load. Based on the power demand, it adjusts the fuel injection to maintain a stable output voltage and frequency, ensuring continuous and reliable power supply.
• Marine Vessel Engine: On a small marine vessel, the device controls the engine's throttle and fuel injection. It monitors the engine temperature, pressure, and speed in real - time and makes adjustments to optimize the engine's performance during different navigation conditions, such as cruising or maneuvering.