5446-348 Woodward speed control module

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Product basic information
Manufacturer: Woodward
Model: 5446-348
Belonging to the famous 505 series
Supports multiple communication protocols and can be smoothly integrated with the existing control system of the factory
Core application: Designed specifically for speed control and protection of steam turbines
5446-348 controller has stable performance and high reliability

Categories: WOODWARD
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5446-348 Woodward speed control module

The 5446-348 is a microprocessor-based digital governor controller produced by Woodward, belonging to its classic 505 series.
It is primarily designed for speed control and protection of steam turbines. Below is a detailed introduction to this product:

I. Product Overview

Brand and Model: Woodward 5446-348
Series: 505 Series Digital Governor
Type: Microprocessor-based controller
Purpose: Specifically designed for steam turbines to control their speed and provide overspeed protection.

II. Core Functions

Speed Control:
- 5446-348 Precisely controls the speed of steam turbines by adjusting steam inlet flow.
- Supports single-range or split-range actuators to accommodate turbines of different sizes.
Overspeed Protection:
- Incorporates triple independent overspeed protection logic to ensure rapid shutdown in case of overspeed, preventing equipment damage.
- Provides an overspeed test button for convenient on-site testing of protection functions.
Emergency Shutdown:
- Equipped with an emergency stop button for immediate shutdown in emergency situations.
System Protection:
- - Automatically switches control modes upon sensor failure to ensure uninterrupted system operation.
  - Offers local/remote control priority selection to adapt to different operational scenarios.

Difference between Microcontrollers and Microprocessors

Microcontrollers and microprocessors are both types of integrated circuits that have certain differences in functionality and applications.

A microprocessor is a chip that only contains the central processing unit (CPU) core and does not integrate other functional modules such

as memory, input/output interfaces, timers, etc. It requires external connections to other chips to achieve various control tasks. The design

of microprocessors is more flexible, and other chips can be selected according to specific application requirements to achieve the required functions.

A microcontroller is a chip that integrates functional modules such as a microprocessor, memory, input/output interface, and timer, and has the

ability to independently complete various control tasks. Microcontrollers generally integrate functional modules such as processors, memory, timers,

input/output interfaces, etc., which can be programmed to achieve various control and processing tasks. Microcontrollers can work independently without the

need for external chips, and have advantages such as small size, low power consumption, high integration, and strong control capabilities. They are suitable for

various embedded systems, electronic control systems, and other fields.

In summary, microprocessors and microcontrollers are both types of integrated circuits, but they have significant differences in functionality and applications.

Microprocessors are more flexible and can be connected to other chips as needed to achieve desired functions; Microcontrollers have the ability to independently

complete various control tasks, with small size, low power consumption, and high integration, making them suitable for various embedded systems, electronic control systems, and other fields.

III. Technical Specifications

Power Supply: 18-32 VDC, supporting 24VDC input.
Display: Two-line x 24-character LED display for clear indication of operating status and parameters.
Enclosure: NEMA 4X or IEC 60529 IP56 rated for protection against harsh industrial environments.
Inputs/Outputs:
- Inputs: 6 programmable current inputs, 16 discrete contact inputs.
- Outputs: 2 actuator outputs, 8 relay outputs, 6 programmable current outputs.
Communication Interfaces: 5446-348 Supports RS-232, RS-422, and RS-485 hardware interfaces for easy integration with host computers or other devices.
Software: Equipped with OpView™ and 505View software for parameter configuration, monitoring, and fault diagnosis.
Operating Temperature: -20 to +60°C (some models support -4 to +140°F).
Storage Temperature: -40 to +85°C (some models support -40 to +185°F).
5446-348 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 5446-348Suitable for steam turbines of various sizes, including industrial steam turbines, small grid turbo-generators, and turboexpanders.
Single Extraction and Admission Applications: Designed for operating steam turbines in single extraction and/or admission applications.
On-Site Programming: Allows on-site operators to program and adjust parameters through an integrated operator control panel, adapting to different operating conditions.

V. Product Advantages

High Reliability:
- Microprocessor-based design ensures precise control and stability.
- Triple independent overspeed protection logic provides multiple layers of safety.
Flexibility:
- Supports various actuator and sensor configurations to accommodate different turbine models.
- Offers a rich set of input/output interfaces for easy system expansion and integration.
Ease of Use:
- Two-line x 24-character LED display provides an intuitive operating interface.
- A 30-key multifunctional keyboard simplifies parameter configuration and operation.
Compatibility:
- Supports multiple communication protocols for easy integration with DCS, PLC, and other systems.
- Provides OpView™ and 505View software for remote monitoring and fault diagnosis.