9906-619 Woodward overspeed protector

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Product basic information
Manufacturer: Woodward
Model: 9906-619
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
9906-619 controller has stable performance and high reliability

Categories: WOODWARD
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9906-619 Woodward overspeed protector

The 9906-619 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 9906-619
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:
- 9906-619 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.

What is a SCSI controller

The English name for SCSI is “Small Computer System Interface”, which is translated as “Small Computer System Specific Interface”

in Chinese; As the name suggests, this is an expansion interface designed for small computers, which allows computers to install other

peripheral devices to improve system performance or add new features, such as hard drives, optical drives, scanners, etc.
Early computers were classified into various levels based on speed and functionality, including mainframes, small computers, and microcomputers.

Some small workstations and servers were classified as small computers, while personal computers were classified as microcomputers; Therefore,

at that time, the models that used SCSI interfaces were mainly mid to high end devices such as workstations and servers. In recent years, due to the

significant increase in personal computer performance and expansion requirements, the application of SCSI in PCs (ordinary microcomputers) has also been increasing.
In fact, SCSI is not a new interface type. It has been almost 20 years since someone noticed the issue of extending the functionality of small computers,

started developing new unified expansion interfaces, and officially established the SCSI standard in 1986. In the early days, Apple was the first to select SCSI

as the standard interface for Macs computers, and many peripherals were connected to the main system through this unified interface. On the PC side,

SCSI interface cards and devices are expensive, and almost all peripherals have cheaper interfaces to replace them, so SCSI is not favored; On the other hand,

there are not many available SCSI devices. On the other hand, today”s peripheral products that support SCSI interface have expanded from only hard drives

and tape drives to various devices such as scanners, optical drives, burners, MOs, etc. The opportunities for people to come into contact with SCSI are gradually increasing;

In addition, with the advancement of manufacturing technology, the prices of SCSI cards and peripherals are no longer high, indicating that the SCSI market has become quite mature.

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: 9906-619 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).
9906-619 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9906-619Suitable 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.