Woodward 8915-986 from SAUL ELECTRIC | In Stock
1.8915-986 Product Overview
The Woodward 8915-986 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.
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2. 8915-986 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 8915-986 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 input-output of PID controller and the control implementation of PID controller
The PID controller (Proportional Integration Differentiation) consists of a proportional unit P, an integral unit I, and a derivative unit D.
By setting the three parameters Kp, Ki, and Kd. The PID controller is mainly suitable for systems with basic linearity and dynamic
characteristics that do not change over time. This article first introduces the working principle of the PID controller, followed by the input and
output of the PID controller, and finally introduces the parameter tuning and control implementation of the PID controller. Follow the editor to learn more about it.
The working principle of PID controller
PID controllers are widely used in industrial process control. Approximately 95% of closed-loop operations in the field of industrial automation use
PID controllers. The controllers are combined in such a way as to generate a control signal.
As a feedback controller, it provides control output to the desired level. Before the invention of microprocessors, PID control was implemented using
analog electronic components. But today all PID controllers are processed by microprocessors. Programmable logic controllers also have built-in PID controller instructions.
By using a low-cost simple switch controller, only two control states are possible, such as fully open or fully closed. It is used for limited control applications,
and these two control states are sufficient to control the target. However, the oscillation characteristics of this control limit its use and are therefore being replaced by PID controllers.
5415-966 505 Turbine Control | 100% Original,
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