中文版
Description
Product Overview
Product Name: Servo Feedback Interface Board
Model Number: DS3820SFEB
Manufacturer: GE Energy (General Electric)
System Compatibility: Mark VI Turbine Control System (Speedtronic)
The GE DS3820SFEB is a critical interface board designed for the Mark VI gas/steam turbine management system. This system represents an evolution from the earlier Mark IV, offering enhanced processing power and digital integration.
The primary function of the DS3820SFEB is to serve as a Servo Feedback or Position Feedback card. It receives signals from sensors, such as Linear Variable Differential Transformers (LVDTs) or Rotary Variable Differential Transformers (RVDTs), which are attached to hydraulic actuators and fuel valves. The board conditions these analog signals and converts them into a high-resolution digital format that the Mark VI’s central controller can read. This provides the control system with real-time, precise knowledge of the actuator’s position, which is essential for closed-loop control of fuel, steam, and air flow into the turbine.
Key Features
- High-Precision Signal Conditioning: Designed to accurately interpret the low-level AC signals from LVDT/RVDT sensors.
- Multiple Input Channels: The board typically supports several independent feedback channels, allowing it to monitor multiple actuators simultaneously.
- Built-in Diagnostics: Features comprehensive self-test and diagnostic capabilities to monitor the health of both the board itself and the connected sensors (e.g., open coil detection, signal validity checks).
- Exciting Voltage Output: Provides the required AC excitation voltage to power the LVDT/RVDT sensors.
- Redundancy Support: The Mark VI system can be configured with redundancy. The DS3820SFEB is a key component within one of these redundant channels.
- Robust Design: Engineered to operate reliably in the harsh electrical environment of a power plant, with high immunity to noise and interference.
DS3800HMPJ1A1D
Technical Specifications
The following table details the typical technical parameters for the DS3820SFEB board.
| Parameter | Specification |
|---|---|
| Board ID | DS3820SFEB |
| Function | Servo / Position Feedback Interface Card |
| Compatible System | GE Mark VI Speedtronic Turbine Control |
| I/O Type | Analog Input (AI) for feedback signals & Analog Output (AO) for excitation. |
| Primary Input | LVDT or RVDT signals (AC signals, typically in the mV to V range). |
| Excitation Output | Provides AC voltage (e.g., 3 Vrms, 5 Vrms) to power the LVDT/RVDT sensors. |
| Number of Channels | Typically supports multiple channels (e.g., 4 or 8). The exact number must be confirmed from the manual. |
| Connector | Plugs into a designated slot in a Mark VI I/O pack (e.g., VMEB chassis). Field wiring is connected to a corresponding termination board. |
| Communication | Communicates digitized position data to the main controller via a proprietary backplane bus (e.g., VME). |
| Power Supply | Receives power from the Mark VI rack’s power supply through the backplane (typically +5 V DC and ±15 V DC). |
| LED Indicators | Status LEDs for power, communication, and channel-specific faults or activity. |
Typical Applications
The DS3820SFEB is a fundamental component within the GE Mark VI control system, essential for:
- Fuel Valve Position Feedback: Precisely measuring the position of gas or liquid fuel control valves for accurate metering.
- Actuator Position Monitoring: Providing feedback on the position of hydraulic actuators controlling Inlet Guide Vanes (IGVs) or compressor bleed valves.
- Steam Valve Position Feedback: Monitoring the position of steam admission valves in combined-cycle or steam turbine applications.
- Closed-Loop Control: Enabling the Mark VI controller to compare the actual actuator position (from this card) with the commanded position (from a servo output card) to ensure precise and stable turbine operation.
Important Notes & Compatibility
- System Component: This board is not a standalone device. It is an integral part of the Mark VI system and is housed in a dedicated I/O pack or chassis.
- Termination Board: It requires a matching termination board (e.g., a specific DS3820Txxx series board) to which the field wiring from the LVDT/RVDT sensors is connected. The main card plugs into this termination board.
- Configuration: The board’s operation (e.g., excitation voltage, scaling) is configured through the Mark VI’s toolset (CIMPLICITY Machine Edition or ToolboxST).
- Critical Safety Function: The feedback provided by this card is vital for the safe and efficient operation of the turbine. Faulty readings can lead to uncontrolled turbine operation, potentially causing severe damage.
- Qualified Personnel Only: Turbine control systems are critical for safety. Only qualified personnel with specific training on GE Speedtronic systems should handle, install, or troubleshoot this component. All safety procedures, including Lockout-Tagout (LOTO), must be followed.
Please contact Sunny sales@xiongbagk.cn for the best price.
➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com
