Woodward 9771-210 from SAUL ELECTRIC | In Stock
1.9771-210 Product Overview
The Woodward 9771-210 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.
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2. 9771-210 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 9771-210 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.
What is the composition of a controller
What is the composition of a 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.
A controller refers to a master command device that controls the starting, speed regulation, braking, and reverse of an electric motor by changing the
wiring of the main circuit or control circuit and changing the resistance value in the circuit in a predetermined order. Composed of program counters,
instruction registers, instruction decoders, timing generators, and operation controllers, it is the “decision-making body” that issues commands, that is,
it completes the coordination and command of the entire computer system”s operations.
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