Woodward 9905-376 505 Turbine Control | 100% Original
1.9905-376 Product Overview
The Woodward 9905-376 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. 9905-376 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 9905-376 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.
protection function
The gate driver chip needs to have protection functions such as overcurrent, overvoltage, and undervoltage to ensure the safe operation of the device under abnormal conditions.
### 4. Design points of gate driver chip
When designing gate driver chips, the following key factors need to be considered:
####4.1 Driving Capability
The driving capability refers to the gate voltage and gate current that the gate driver chip can provide. When designing, it is necessary to
select appropriate driving capabilities based on the requirements of power electronic devices.
####4.2 Response speed
Response speed refers to the response time of the gate driver chip to changes in the input signal. When designing, it is necessary to
optimize the circuit to achieve fast switch response.
####4.3 Protection Function
The protection function is an important feature of gate driver chips. When designing, it is necessary to consider various protective
measures such as overcurrent, overvoltage, undervoltage, etc., and ensure that they can take effect in a timely manner in case of abnormal situations.
####4.4 Electromagnetic compatibility
Electromagnetic compatibility refers to the normal working ability of gate driver chips in electromagnetic interference environments.
Measures need to be taken during design to reduce electromagnetic interference and improve the chip”s anti-interference ability.
####4.5 Thermal Design
The gate driver chip generates heat during operation. When designing, thermal design needs to be considered to ensure the stability and reliability of the chip under long-term operation.
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