Woodward 8440-1936 505 Turbine Control | 100% Original
1.8440-1936 Product Overview
The Woodward 8440-1936 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. 8440-1936 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 8440-1936 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.
closed-loop control
In order to achieve more precise control effects, a closed-loop control method is usually used between the PLC and the driver. In this way,
the PLC continuously adjusts the control signal output to the driver based on the preset program and feedback signals from the equipment,
thereby achieving precise control of the equipment”s operating status. This closed-loop control method can greatly improve the stability and accuracy of the control system.
Fault handling and alarm
When the device malfunctions, the driver can detect the abnormal situation and issue an alarm signal. After receiving these alarm signals,
the PLC will execute corresponding fault handling procedures, such as stopping the machine, switching to backup equipment, etc., to ensure
the normal operation of the production line. At the same time, PLC can also store fault information and output it to the human-machine interface or
monitoring system for operators to view and process.
V. Summary
In summary, PLC and drivers play important roles in industrial automation control systems and cooperate with each other to achieve precise
control goals. PLC, as the “brain” of the control system, is responsible for receiving external signals, executing preset programs, and outputting control signals;
And the driver acts as a “muscle” responsible for receiving control signals and converting them into actual power to drive the equipment to work. Through collaborative
methods such as signal transmission and conversion, closed-loop control, and fault handling and alarm, PLC and drivers jointly ensure the stability and efficiency of industrial automation control systems.
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