Woodward B8271-464 from SAUL ELECTRIC | In Stock
1.B8271-464 Product Overview
The Woodward B8271-464 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. B8271-464 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 B8271-464 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 difference between PID controller and PWM controller
CHANBAEK • Source: Network Compilation • June 5, 2024 18:25 • 6775 views
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1. Introduction
In industrial automation and control system design, PID controller (proportional integral derivative controller) and PWM controller
(pulse width modulation controller) are two commonly used control strategies. Although they can all achieve precise control of the system,
there are significant differences in principles, applications, control characteristics, and other aspects. This article will provide a
detailed comparison and analysis of PID controllers and PWM controllers to reveal their differences.
2、 Overview of PID Controller
PID controller is a feedback based control algorithm consisting of three control terms: proportional (P), integral (I), and derivative (D).
It measures the difference (i.e. error) between the output value of the controlled object and the expected value, and then processes the
error based on the three control terms P, I, and D to obtain the output of the controller. The principle of PID controller is based on error feedback
regulation and has adaptive ability, which can dynamically adjust control parameters according to actual situations.
principle
The principle of PID controller is based on error feedback regulation. It first measures the output value of the controlled object, and then
compares it with the expected value to obtain the error. Next, the error is processed based on proportional, integral, and derivative control
terms to obtain the output of the controller. Among them, the proportional control term is proportional to the error and is used to quickly reduce
the error; The integral control term is mainly used to eliminate accumulated errors and make the system more stable; The differential control term
adjusts the output of the controller based on the rate of error change, making the system response faster and reducing overshoot.
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