9905-708 Woodward speed control module

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Product basic information
Manufacturer: Woodward
Model: 9905-708
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
9905-708 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 9905-708 controller debugger module Motor touch screen WOODWARD

9905-708 Woodward speed control module

The 9905-708 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 9905-708
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:
- 9905-708 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.

Application Fields of CPU Controllers
CPU controllers are widely used in various fields, such as:

(1) Personal computer: used to execute various applications such as office software, image processing, games, etc.

(2) Server: Used to handle a large number of network requests, provide web services, database services, etc.

(3) Embedded systems: used to control various devices such as smartphones, smart homes, automotive electronics, etc.

(4) High performance computing: used to perform complex scientific calculations such as weather forecasting, molecular simulations, etc.

(5) Artificial Intelligence: Used to execute deep learning, machine learning, and other algorithms to achieve intelligent recognition, natural language processing, and other functions.

The Development Trend of CPU Controllers
The development trend of CPU controllers mainly includes the following aspects:

(1) Higher frequency: With the advancement of process technology, the CPU’s frequency will continue to increase, improving computing speed.

(2) More cores: Multi core CPUs will become mainstream, achieving higher parallel computing capabilities.

(3) Larger cache: With the improvement of CPU performance, cache capacity will continue to increase, improving data access speed.

(4) Lower power consumption: By optimizing design and process technology, CPU power consumption is reduced, achieving energy conservation and environmental protection.

(5) More intelligent control: Through artificial intelligence technology, CPU adaptive control is achieved to improve computing efficiency.

(6) Wider application: CPU controller will be used in more fields, such as Internet of Things, edge computing, etc.

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: 9905-708 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).
9905-708 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9905-708Suitable 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.