Woodward 9904-261 |CPU Module, Origin: United States
1.9904-261 Product Overview
The Woodward 9904-261 belongs to the 505/505E series digital turbine controllers. It is a microprocessor-based control module designed for single-valve steam turbines,
including single extraction/admission systems or split-range actuator configurations.
The controller features a front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad, allowing easy on-site configuration and monitoring.
2. 9904-261 Technical Specifications and Parameters
| Parameter | Details |
|---|---|
| Power Supply | +24 VDC, approx. 1 A |
| I/O Outputs | Discrete Outputs: 8 Analog Outputs: 6 Actuator Outputs: 2 |
| Display / HMI | Two-line, 24-character LCD, with multi-function keypad |
| Dimensions | Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm) |
| Weight | Approx. 9.11 lbs (4.13 kg) |
| Operating Temperature | –4 to +140 °F (–20 to +60 °C) |
| Storage Temperature | –40 to +185 °F (–40 to +85 °C) |
| Humidity Standard | 95% RH at 20-55 °C for 48 hours without damage |
| Protection Class | Typically meets industrial dust and water protection standards |
| Communication Protocol | Supports Modbus, RS-232 / RS-422 serial interfaces |
3. Brand History
Woodward, Inc., founded in 1870 and headquartered in Fort Collins, Colorado, USA, is a global leader in energy control systems. The company has a long history of innovation in turbine control, engine management,
and power generation systems.
Woodward products are widely recognized for their reliability and precision in demanding industrial and power generation applications.
4. Applications in Industrial Automation
The 9904-261 plays a critical role in industrial automation and power generation environments:
- Steam Turbine Control: Manages startup, speed regulation, and extraction/admission control of steam turbines.
- Power Generation Systems: Used in power plants to regulate turbine-driven generators for stable frequency and load management.
- Compressor and Pump Drive Control: Ensures precise speed control for turbine-driven compressors and pumps.
- Process Industry Applications: Applied in chemical plants, refineries, and other industries requiring precise turbine operation.
- Safety and Protection Functions: Includes overspeed protection, critical speed avoidance, actuator travel limits, and event logging for operational safety.
Components of the controller
Components of the controller
The controller consists of a program counter, instruction register, instruction decoder, timing generator, and operation controller.
Controllers are divided into combinational logic controllers and microprogram controllers, each with its own strengths and weaknesses.
The design of combinational logic controllers is complicated and structurally complex. Once the design is completed, it cannot be modified
or expanded, but it is fast. The microprogram controller is easy to design, has a simple structure, and is convenient for modification or expansion.
To modify the function of a machine instruction, simply reprogram the corresponding microprogram;
To add a machine instruction, simply add a microprogram to the control memory, but it is done by executing a microprogram. The specific
comparison is as follows: a combinational logic controller, also known as a hard wired controller, is composed of logic circuits and relies entirely
on hardware to implement the functions of instructions.
Click to learn more about Woodward”s products
Ushio Inc. PE-250U3SV1 4 inch wafer chuck grindingcoati
ASML 4022.480.66105 Fiber Optic Light Source TWINSCAN XT:1250 System Working
SVG JDS Uniphase ASML 4022.472.42562 Laser Head 55mW, 532nm YV04 Class 3b
ASML KAY PNEUMATIC BOX FOR PAS 25005000 300-42621, KMV1945 VALVES
ASML 4022.428.1449 Reticle Handling Control PCB Card PAS 50002500 Working
ASML 4022.455.9427 Control Module With Phase Modulator for ASML Green Laser
ASML 854-9527-003 RETICLE FIELD DEFINING MSX
02-15783-08 ASM AD898 SERVO DRIVER 02-15783-08 REV F, APD20 AC DUAL ASML
ASML 402250245116 ENCL 1000W TCU REPL BY 2500W
ASML 4022.470.27123
ASML 4022.668.65961
14066 ASML MODULE BOARD SVG MOTION CONTROLLER, PCB 4022.471.6982
ASML 4022.480.0012 300mm Wafer Handler FOUP 4022.480.1865 SVG Untested Surplus
ASML 4022.472.58471 Green Laser Sensor 4022.472.58471
ASML 4022.638.19432 4022.638.19562 Wafer Loader
ASML ASM LITHOGRAPHY TB2500T 160MMS PCB PN 4022.436.2447 FOR PAS 25005000
ASM INTERNATIONAL N.V. 2374110-01 INJECT GAS DIV RING LPC FR M
22375 PHILIPS PCB PROCESSOR CARDS ASML PAS 50002500 712271410003
12456 ASML PCB, MOTION CONTROL BOARD 4022.436.6467
New Prodrive PAAC 55025 ASSY ASML 4022.471.90851
Philips PG 3301 COM 4A Processor PCB Card ASML 4022.422.7999 PAS 50002500
ASML 4022.455.4531 Wafer Chuck Table
There are no reviews yet.