WOODWARD 9907-1200 Digital Governor

WOODWARD 9907-1200 Digital Governor

Core positioning

9907-1200 is a high-performance programmable digital speed controller that inherits the reliable architecture of the 9907 series and supports richer communication protocols and more complex control applications through specific hardware configurations and software features. It is not only a speed regulator, but also a programmable logic controller.

Main Features

Advanced control capability

Precision tuning engine: Provides fast and stable speed regulation performance for constant speed (power generation) and variable speed (mechanical drive) applications.

Multiple operating modes:

Speed control (Droop/Isochronous)

Load/power control

Process control (such as pressure, temperature, flow control)

Programmable auxiliary PID: In addition to the main speed control loop, one or more freely programmable auxiliary PID controllers are usually provided for implementing complex cascade or composite control.

Powerful communication and network connectivity

Key feature: One prominent feature of 9907-1200 is its built-in multi protocol communication capability. It is usually equipped with:

CAN (SAE J1939): Used for standard vehicle/industrial communication with engine ECU, instrument panel, etc.

Modbus RTU (RS-232/RS-485): Used for easy integration into industrial SCADA, PLC, or upper computer monitoring systems.

Ethernet communication (supported by certain firmware versions or configurations): Supports Modbus TCP/IP or Woodward proprietary protocols for easy network management and remote access.

Data access: Through the communication port, all operating parameters and setpoints can be remotely read, and key settings can be modified.

Integrated design and interface

Built in driver: Integrated actuator driver circuit, can directly drive Woodward P series (such as PSA, PST) electromagnetic actuators.

Rich I/O:

Analog input: used for speed sensing (magneto electric or active), process variable feedback (4-20mA/0-10V), current transformers (for power measurement), etc.

Digital input: start stop, idle/rated speed, grid connection, acceleration and deceleration, etc.

Analog and relay outputs: used for indication, alarm, or auxiliary control.

Local operation panel: equipped with backlit LCD screen and buttons, used for basic settings, monitoring, and manual operation.

Comprehensive protection and diagnosis

Configurable protection: Users can program protection functions such as overspeed, low-speed, sensor failure, actuator failure, etc., and set alarm, load reduction, or shutdown actions.

Event Recorder: Detailed recording of operational events, alarms, and shutdown reasons for easy fault analysis.

Perform in-depth diagnosis through Toolkit software.

Typical application scenarios

Due to its flexibility and powerful communication capabilities, the 9907-1200 is suitable for applications with high requirements for control and integration:

Generator set: As a main speed controller, it can easily communicate with the generator controller through Modbus ATS、 Integration of parallel cabinet or power station management system.

Mechanical drive: used for controlling the speed or process of equipment such as compressors and pumps.

Oil and gas fields: As the speed control core of gas engines or diesel engines, they are closely coordinated with process control systems (such as compressor control).

Marine auxiliary machinery.

Product advantages

Easy system integration: The rich standard industrial communication protocols (Modbus, J1939) make it a "friendly member" in automation systems, reducing the need for gateway conversion.

Flexible control: Programmable PID and multiple modes enable it to adapt to complex application requirements.

Easy upgrade: It is an ideal choice to replace old-fashioned analog speed controllers or other early digital speed controllers and improve the level of system automation.

Reliability: Possess the industrial grade durability consistent with Woodward products.

Matching and compatibility

Main driver: Woodward P series electromagnetic actuator.

Configuration software: Woodward Toolkit must be used ™  Complete software configuration, parameter tuning, and data recording. Basic settings can also be completed through the panel.

Network: It is an ideal underlying controller for building network-based engine monitoring systems.