9907-175 Woodward overspeed protector

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Product basic information
Manufacturer: Woodward
Model: 9907-175
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
9907-175 controller has stable performance and high reliability

Categories: WOODWARD
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9907-175 Woodward overspeed protector

The 9907-175 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 9907-175
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:
- 9907-175 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.

PLC controller maintenance

PLC controller is an important component of industrial automation systems, and if a fault occurs, it may affect the entire

production process. Here are some common steps for repairing PLC controllers:

Confirm the fault phenomenon: When the PLC controller malfunctions, the first thing to confirm is what the fault

phenomenon is, such as the equipment cannot start normally, the equipment cannot operate normally after starting, etc.

Troubleshooting software issues: If the PLC controller experiences software malfunctions, it is necessary to

check whether the program is correct and whether the equipment parameters are set correctly.

Troubleshooting hardware faults: If the PLC controller experiences hardware faults, it is necessary to check whether

the power supply is normal, whether the I/O module is damaged, and whether there are loose connection wires inside the PLC.

Replace damaged components: If a component in the PLC controller is damaged, it needs to be replaced, such as

replacing damaged power supplies, I/O modules, etc.

Restart the PLC controller: After completing the repair, it is necessary to restart the PLC controller and conduct necessary tests to

ensure that the equipment is functioning properly.

It should be noted that PLC controller maintenance requires certain professional knowledge and skills. If unsure how to repair,

please seek the help of professionals. In addition, relevant safety regulations must be strictly followed during maintenance to ensure the safety of personnel and equipment.

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: 9907-175 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).
9907-175 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9907-175Suitable 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.