الوصف
The WOODWARD 8200-1202 is an Analog Input/Output (AIO) Module within Woodward’s distributed I/O family. It’s designed to handle a specific mix of analog signals, making it suitable for a variety of industrial monitoring and control applications.
1. SEO-Optimized Titles:
- WOODWARD 8200-1202: 4-20 mA Analog I/O Module (8 Inputs / 2 Outputs).
- WOODWARD 8200-1202: LinkNet-HT Analog Input/Output Module.
- WOODWARD 8200-1202: Industrial Process Variable Interface.
- WOODWARD 8200-1202: Woodward Distributed Analog I/O for Control Systems.
- WOODWARD 8200-1202: High-Accuracy 4-20 mA Signal Interface.
2. Product Overview:
The WOODWARD 8200-1202 is an Analog Input/Output (AIO) module that operates as part of Woodward’s LinkNet-HT (High-Temperature) series of distributed I/O. Its primary role is to provide a dedicated interface for analog signals, allowing the main control system to monitor various process variables and send precise control commands.
Specifically, it offers:
- 8 Analog Input Channels: Designed to receive 4-20 mA current signals from sensors.
- 2 Analog Output Channels: Designed to send 4-20 mA current signals to actuators.
This configuration makes it ideal for applications requiring a significant number of analog measurements coupled with a few analog control outputs.
- Product Type: Analog Input/Output (AIO) Module
- Manufacturer: Woodward
- Series: LinkNet-HT (High-Temperature)
- Channels: 8 Analog Inputs (4-20 mA), 2 Analog Outputs (4-20 mA)
- Function: Acquires analog sensor data and generates analog control signals.
3. Detailed Product Description:
The WOODWARD 8200-1202 is a crucial component for extending the analog I/O capabilities of Woodward control systems, such as the 505XT or MicroNet systems via a gateway. As part of the LinkNet-HT series, it’s designed for deployment in challenging industrial environments.
Here’s a closer look at its features and function:
- 8 Analog Input Channels (4-20 mA): Each of these eight channels is configured to receive a standard 4-20 mA current loop signal. This is the most common and robust analog signal type in industrial automation, known for its immunity to electrical noise over long distances. These inputs are used to monitor a wide range of process variables from various sensors, including:
- Pressure Transmitters: Fuel pressure, oil pressure, steam pressure.
- Flow Transmitters: Fuel flow, air flow, lube oil flow.
- Level Transmitters: Tank levels, reservoir levels.
- Position Transmitters: Valve positions, damper positions.
- Other Process Variables: Any instrument that outputs a 4-20 mA signal representing a continuous measurement.
- 2 Analog Output Channels (4-20 mA): These two channels are capable of generating a precise 4-20 mA current signal. These outputs are used to control proportional actuators and other field devices that respond to a continuous current signal, such as:
- Proportional Valves: Fuel valves, steam admission valves, bypass valves.
- Variable Speed Drives (VSDs): Setting motor speeds.
- Process Controllers: Sending setpoints or remote commands to other local controllers.
- LinkNet-HT Communication: The module communicates with the main control system over the LinkNet-HT (High-Temperature) network. This is a robust, high-speed, and deterministic CANopen-based communication protocol. LinkNet-HT allows the I/O modules to be distributed throughout the plant, closer to the sensors and actuators. This significantly reduces complex wiring runs, minimizes signal degradation, and enhances overall system flexibility. The “HT” in LinkNet-HT signifies its capability to operate reliably in environments with higher ambient temperatures and vibrations.
- High Accuracy and Reliability: Woodward modules are known for their precision and durability. The 8200-1202 provides accurate analog-to-digital conversion for inputs and digital-to-analog conversion for outputs, ensuring reliable data acquisition and precise control. It’s built to withstand the rigors of industrial operations.
- Applications: Its combination of numerous inputs and a couple of outputs makes it suitable for “read-heavy” applications with some direct analog control needs.
The 8200-1202 is similar to the 8200-1203, with a key distinction: the 8200-1203 typically includes integrated 24 VDC loop power for its analog inputs, simplifying wiring for sensors that require external power. The 8200-1202 typically requires external loop power for its inputs.
4. Technical Specifications (General, as precise details can vary slightly by manual version):
5. Typical Applications:
The WOODWARD 8200-1202 is well-suited for industrial applications where precise measurement of multiple analog process variables and a limited number of analog control outputs are required, particularly in a distributed I/O architecture:
- Gas and Steam Turbines: Monitoring various pressures (fuel, oil, atomizing air), flows (fuel, lube oil), valve positions (governor valve, bypass valve feedback), and sending commands to a few critical proportional valves.
- Compressor Stations: Monitoring suction/discharge pressures, flow rates, and controlling recirculation or bypass valves.
- Process Control: General industrial processes requiring the monitoring of numerous analog signals (e.g., in chemical plants, refineries) and a few analog control adjustments.
- Engine Control: Monitoring engine parameters like oil pressure, fuel pressure, and controlling proportional fuel valves or EGR valves.