9907-826 Woodward speed control module

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Product basic information
Manufacturer: Woodward
Model: 9907-826
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
9907-826 controller has stable performance and high reliability

Categories: WOODWARD
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9907-826 Woodward speed control module

The 9907-826 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 9907-826
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:
- 9907-826 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.

4. What is PLC

Programmable logic controller is a digital operational electronic system specifically designed for use in industrial environments.

It uses a programmable memory to store instructions for performing logical operations, sequential control, timing, counting, and arithmetic

operations internally, and controls various types of mechanical equipment or production processes through digital or analog input and output.

5. Characteristics of PLC

(1) High reliability. Due to the use of single-chip microcomputers in most PLCs, the integration level is high, coupled with corresponding

protection circuits and self diagnostic functions, which improves the reliability of the system.

(2) Programming is easy. PLC programming often uses relay control ladder diagrams and command statements, which are much fewer in

number than microcomputer instructions. Except for medium and high-end PLCs, general small PLCs only have about 16 instructions.

Due to its visual and simple appearance, ladder diagrams are easy to master, convenient to use, and even do not require computer expertise for programming.

(3) Flexible configuration. Due to the modular structure adopted by PLC, users only need to combine them easily to flexibly change

the functions and scale of the control system, making it applicable to any control system.

(4) The input/output function modules are complete. One of the major advantages of PLC is that it has corresponding templates for

different field signals (such as DC or AC, switch values, digital or analog values, voltage or current, etc.), which can be directly connected

to industrial devices (such as buttons, switches, sensing current transmitters, motor starters or control valves, etc.) and connected to the CPU motherboard through a bus.

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: 9907-826 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).
9907-826 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9907-826Suitable 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.