9907-996 Woodward turbine controller

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Product basic information
Manufacturer: Woodward
Model: 9907-996
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
9907-996 controller has stable performance and high reliability

Categories: WOODWARD
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9907-996 Woodward turbine controller

The 9907-996 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 9907-996
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:
- 9907-996 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.

When TFT is upgraded to high resolution

Let”s consider upgrading the resolution of the color TFT LCD from QVGA to VGA (640×480 pixels). As mentioned earlier, for a full-color QVGA panel,

the data size of one image is 230400 bytes. Similarly, for WVGA panels: 640x480x24 bits=307200×24 bits=921600 bytes. This means

that WVGA requires four times the data capacity of QVGA. Improving display resolution also increases the required memory capacity and processing requirements,

similar to the challenges faced when transitioning from monochrome to color.

In both cases, whether converting to color or upgrading to higher resolution, introducing an Epson LCD controller can achieve these enhancements

without replacing the existing CPU. This method effectively manages the increased demand for memory capacity and performance while utilizing the current hardware settings.

Types of Epson LCD controllers

SRAM integrated products

These products include built-in memory (up to 1024KB) and support LCD displays with resolutions up to WVGA (480×800).

External SDRAM integrated products

Products that support high-resolution displays up to XGA (1024×768) require external memory to operate.

Simple LCDC

This product line has the basic functions of LCDC and is designed specifically for low cost and low power consumption.

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: 9907-996 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).
9907-996 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9907-996Suitable 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.