Woodward 8440-1936 |CPU Module, Origin: United States
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.
Servo drive malfunction and maintenance
A servo driver is a controller used in conjunction with a servo motor to control the servo motor. It is a part of the servo system
and plays a very important role in the industrial field. So, customers must know some common faults and troubleshooting methods
after purchasing servo drives, in order to quickly deal with similar problems. Today, the editor of Huantong Electromechanical will share
with you the maintenance methods for servo drives.
(1) After power on, the LED light of the servo drive does not light up
Fault cause: It may be due to low voltage
Solution: Increase the voltage
(2) The LED light is on, but the servo motor is not rotating
Reason for malfunction: The command signal is not connected to the driver signal ground
Solution: Connect the command signal ground to the driver signal ground
(3) The LED light stays red all the time
Reason for malfunction: There is a malfunction present
Solution: Check if the machine has any issues such as overvoltage, overheating, short circuit, etc.
(4) When the servo motor rotates, the LED light flashes continuously
Fault cause: HALL phase setting error
Solution: Check if the motor phase switch setting is correct.
Have you learned how to summarize several common servo drive faults and their solutions?
We can easily handle similar problems in the future.
Click to learn more about Woodward”s products
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