Woodward 9904-111 from SAUL ELECTRIC | In Stock
1.9904-111 Product Overview
The Woodward 9904-111 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.
contacts： Mike
+86 18350224834 （WeChat/WhatsApp）
Email：Mike18350224834@gmail.com
2. 9904-111 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 9904-111 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.
The role of PLC controller
PLC (Programmable Logic Controller) controllers are mainly used to control machine equipment and automated
production processes. It can receive input signals from sensors, buttons, switches, etc., and output control signals
after logical processing, achieving automation control of industrial production processes. The main functions of a PLC controller are as follows:
Receiving and processing input signals: PLC controllers can receive input signals from different types of sensors,
buttons, switches, etc., and perform logical processing to determine whether the input signals meet the set conditions.
Perform control operations: Based on the processing results of input signals and preset control logic, PLC controllers
can perform various control operations such as logic operations, timing control, counting control, analog processing, etc.,
and output control signals to control the operation of machine equipment.
Realize control of automated production processes: PLC controllers can achieve automation control of industrial
production processes, such as automated assembly, automated packaging, automated chemical reactions, automated conveying, etc.
Programmable: PLC controllers have programmability, allowing users to write programs for different control tasks
and modify and upgrade the programs as needed.
Stability and reliability: The PLC controller adopts a dedicated control chip and operating system,
which has good stability and reliability, and can work normally even in harsh working environments.
Flexibility: The input and output modules of the PLC controller can be expanded and modified as needed to adapt to different control tasks and production requirements.
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