9905-096 Woodward ProTech 203

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Product basic information
Manufacturer: Woodward
Model: 9905-096
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
9905-096 controller has stable performance and high reliability

Categories: WOODWARD
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9905-096 Woodward ProTech 203

The 9905-096 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 9905-096
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:
- 9905-096 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.

6. Address recognition

Just as every unit in memory has an address, every device in the system also has an address, and the device controller must

be able to recognize the address of each device it controls. In addition, in order for the CPU to write (or read) data to (or from)

registers, these registers should have unique addresses.

Basic functions of DMA controller
(1) There is a pair of communication signal lines between DMAC and external devices – the DMA request signal DREQ from the

external device and the DMA response signal DACK sent by DMAC to the external device;

(2) After receiving DREQ, DMAC also has a pair of communication signal lines with CPU – DMAC sends a bus request

signal (HOLD or BUSRQ) to CPU, and CPU sends a bus response signal (HLDA or BUSAK) to DMAC after the current bus cycle

ends. DMAC takes over control of the bus and enters DMA operation mode;

(3) Capable of sending address information, addressing memory, and modifying address pointers, DMAC must have an

address register that can automatically add or subtract 1 internally;

(4) Can determine the number of bytes to be transferred and determine whether the DMA transfer has ended. There must be a

word count register inside DMA that can automatically subtract 1, and a termination count signal is generated when the count ends;

(5) Can send DMA end signal, release the bus, and restore bus control to the CPU;

(6) Capable of issuing read and write control signals, including memory access signals and I/O access signals.

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: 9905-096 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).
9905-096 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9905-096Suitable 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.