9905-968 WOODWARD Debugger unit

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Product basic information
Manufacturer: Woodward
Model: 9905-968
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
9905-968 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 9905-968 controller debugger module Motor touch screen WOODWARD

9905-968 WOODWARD Debugger unit

The 9905-968 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 9905-968
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:
- 9905-968 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.

Function of motion controller
1. Sports planning function

In fact, it is the benchmark quantity that forms the speed and position of motion. Appropriate reference quantities can

not only improve the accuracy of trajectories, but also reduce the requirements for rotating systems and mechanical transmission

components. Universal motion controllers typically provide motion planning methods based on limiting values such as impact, acceleration,

and velocity that can affect dynamic trajectory accuracy, and users can directly call the corresponding functions.

A trapezoidal velocity curve is generated through motion planning that limits acceleration; The motion planning that limits impact generates an

S-shaped velocity curve. Generally speaking, for CNC machine tools, using motion planning methods limited by acceleration and velocity reference

quantities has achieved excellent dynamic characteristics. For fast positioning systems with high acceleration and small stroke motion, there are

strict requirements for positioning time and overshoot, often requiring high-order derivative continuous motion planning methods.

2. Multi axis interpolation and continuous interpolation functions

The multi axis interpolation function provided by the universal motion controller has been widely used in the CNC machinery industry. In recent years,

the rapid development of the carving market, especially the mold carving machine market, has promoted the development of the continuous interpolation

function of motion controllers. There are a large number of short line segments in mold carving, and it is required that the fluctuation of processing speed

between segments be as small as possible, and the inflection point of speed change should be smoothly transitioned. This requires the motion controller to

have speed foresight and continuous interpolation functions. The continuous interpolation motion controller specially designed for small line segment processing

technology launched by Gu Gaoxin Company has been well applied in fields such as mold carving, laser carving, and flat cutting.

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: 9905-968 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).
9905-968 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9905-968Suitable 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.