Woodward 9905-799 505 Turbine Control | 100% Original
1.9905-799 Product Overview
The Woodward 9905-799 belongs to the 505/505E series digital turbine controllers. It is a microprocessor-based control module designed for single-valve steam turbines,
including single extraction/admission systems or split-range actuator configurations.
The controller features a front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad, allowing easy on-site configuration and monitoring.
2. 9905-799 Technical Specifications and Parameters
| Parameter | Details |
|---|---|
| Power Supply | +24 VDC, approx. 1 A |
| I/O Outputs | Discrete Outputs: 8 Analog Outputs: 6 Actuator Outputs: 2 |
| Display / HMI | Two-line, 24-character LCD, with multi-function keypad |
| Dimensions | Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm) |
| Weight | Approx. 9.11 lbs (4.13 kg) |
| Operating Temperature | –4 to +140 °F (–20 to +60 °C) |
| Storage Temperature | –40 to +185 °F (–40 to +85 °C) |
| Humidity Standard | 95% RH at 20-55 °C for 48 hours without damage |
| Protection Class | Typically meets industrial dust and water protection standards |
| Communication Protocol | Supports Modbus, RS-232 / RS-422 serial interfaces |
3. Brand History
Woodward, Inc., founded in 1870 and headquartered in Fort Collins, Colorado, USA, is a global leader in energy control systems. The company has a long history of innovation in turbine control, engine management,
and power generation systems.
Woodward products are widely recognized for their reliability and precision in demanding industrial and power generation applications.
4. Applications in Industrial Automation
The 9905-799 plays a critical role in industrial automation and power generation environments:
- Steam Turbine Control: Manages startup, speed regulation, and extraction/admission control of steam turbines.
- Power Generation Systems: Used in power plants to regulate turbine-driven generators for stable frequency and load management.
- Compressor and Pump Drive Control: Ensures precise speed control for turbine-driven compressors and pumps.
- Process Industry Applications: Applied in chemical plants, refineries, and other industries requiring precise turbine operation.
- Safety and Protection Functions: Includes overspeed protection, critical speed avoidance, actuator travel limits, and event logging for operational safety.
3、 Types of motor controllers
There are many types of motor controllers, which can be divided into the following types based on factors such as control objects,
power levels, and application scenarios:
DC motor controller: The DC motor controller is mainly used to control the operation of DC motors. It changes the speed
and direction of the motor by altering the input DC voltage and current. DC motor controllers have the advantages of wide speed range,
fast speed response, and high reliability, and are widely used in machine tools, conveying machinery, trams, and cranes.
AC motor controller: AC motor controllers are mainly used to control the operation of AC motors. It changes the speed and direction of the
electric motor by varying the input AC voltage and frequency. AC motor controllers have the advantages of wide speed range and high control accuracy,
and are widely used in industrial production automation, air conditioning, fans, water pumps, and other fields.
Stepper motor controller: A stepper motor controller is a device that converts pulse signals into motor rotation angles. It usually consists of drive circuits,
control logic circuits, and relays. Stepper motor controllers are widely used in fields such as printers, CNC machine tools, and automation equipment.
Brushless motor controller: Brushless motor controller is an advanced motor controller suitable for brushless DC motors. It changes the speed and
direction of the motor by altering the pulse width and frequency of the input. Brushless motor controllers have advantages such as high efficiency, low noise,
and long lifespan, and are widely used in fields such as drones, electric scooters, and electric bicycles.
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