9905-968 Woodward ProTech 203

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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 ProTech 203

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.

The stepper motor driver is specifically designed to drive stepper motors, and stepper motors cannot be directly connected to DC or AC

power sources for operation. The controller sends the step pulse and direction signal to the stepper motor driver, which converts the step

pulse signal into the power signal required to excite the stepper motor. Stepper motor drivers usually have subdivision functions, which can

subdivide the step angle and current, achieving more precise control and lower noise and vibration.

A servo motor driver is a controller used to drive and control servo motors, and is a part of a servo system. The servo motor driver receives

command signals from the control system and transmits current to the servo motor to generate motion proportional to the command signals.

Servo motor drivers typically control parameters such as position, speed, and torque of servo motors to achieve high-precision positioning of

transmission systems. By attaching sensors to the servo motor, the driver can provide feedback on the actual state of the

motor to the control system, compare the commanded state, and correct deviations. In practical applications, servo motor drivers and servo motors are often used as a whole.

In summary, drivers are classified according to different types and application scenarios of motors, including brushed motor drivers, brushless

motor drivers, stepper motor drivers, and servo motor drivers. They play important roles in their respective fields, driving the continuous development of motor technology.

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.