Woodward A8516-042 from SAUL ELECTRIC | In Stock
1.A8516-042 Product Overview
The Woodward A8516-042 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. A8516-042 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 A8516-042 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.
3. Data exchange
This refers to the implementation of data exchange between CPUs and controllers, as well as between controllers and devices.
For the former, data is written to the controller in parallel by the CPU through the data bus, or read from the controller in parallel; For the latter,
the device inputs data into the controller or transmits data from the controller to the device. For this purpose, data registers must be set up in the controller.
4. Status description
The status controller for identifying and reporting equipment should record the status of the equipment for the CPU to understand. For example,
the CPU can only start the controller to read data from the device when it is in the ready to send state. For this purpose, a status register should be s
et up in the controller, where each bit reflects a certain state of the device. After the CPU reads the contents of the register, it can understand the status of the device.
5. Receive and identify commands
The CPU can send various commands to the controller, and the device controller should be able to receive and recognize these commands.
For this purpose, the controller should have corresponding control registers to store received commands and parameters, and decode the
received commands. For example, a disk controller can receive 15 different commands such as Read, Write, Format, etc. sent by the CPU, and
some commands also have parameters; Correspondingly, there are multiple registers and command decoders in the disk controller.
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