Product Short Description
Technical Specifications
- Electrical Parameters
- It is specialized in processing signals from K, J, and S type thermocouples, which are commonly used in industrial high-temperature measurement, covering a temperature sensing range of -200°C to 1300°C to meet the temperature monitoring needs of different parts of turbines.
- It supports cold-junction compensation with a compensation accuracy of ±0.5°C, which eliminates measurement errors caused by ambient temperature changes at the sensor connection points and ensures temperature data accuracy.
- It outputs standardized 4 – 20mA current signals and ±10VDC voltage signals, which can be directly matched with the signal input requirements of Mark series control system core modules.
- It operates with a rated working voltage of 24VDC, and the power consumption is less than 3W, achieving low-energy operation while ensuring signal processing performance.
- Hardware and Connection Parameters
- It is equipped with 8 groups of temperature signal input terminals, which can simultaneously connect multiple thermocouples to realize multi-point temperature synchronous monitoring of turbines.
- It is configured with two 16-pin signal output connectors, which are used for data transmission with the system bus and other functional boards, and the connection is firm to avoid signal interruption caused by vibration.
- It is integrated with two trimming resistors, which can manually calibrate signal output precision according to on-site debugging needs to adapt to different system matching requirements.
Description
- Physical and Environmental Parameters
- It adopts a standard rectangular circuit board structure with dimensions of 150mm×100mm×20mm, which fits the slot size of Mark series control cabinets and can be installed without modifying the original rack.
- It maintains stable operation in an ambient temperature range of -30°C to 60°C, adapting to the temperature fluctuations in indoor turbine control rooms and outdoor auxiliary equipment areas.
- It has IP40-level dustproof protection performance, which prevents dust accumulation on the board surface from causing short circuits or component damage.
Function Features
- Multi-channel Synchronous Temperature Signal Processing
The board is designed with 8 independent signal processing channels that can receive and process temperature data from multiple thermocouples at the same time. It ensures that the control system can obtain temperature information of multiple key parts of the turbine synchronously, such as the temperature of the combustion chamber and the exhaust temperature, which avoids data asynchrony that may lead to incorrect control instructions.
- High-precision Signal Calibration and Compensation
The built-in cold-junction compensation circuit and trimming resistors solve the problem of temperature measurement deviation caused by environmental factors and sensor aging. Operators can calibrate each channel separately through trimming resistors, and the compensation circuit automatically adjusts parameters in real time. This dual guarantee enables the temperature measurement error to be controlled within a very small range, providing reliable data for turbine state evaluation.
- Strong Anti-interference Capability
The board adopts a multi-layer shielding circuit design, which can effectively resist electromagnetic interference generated by high-power turbine generators, frequency converters, and other equipment. It filters out high-frequency noise in the signal transmission process, ensuring that the processed temperature signals remain stable and undistorted even in complex electromagnetic environments.
- Fault Signal Rapid Feedback
When a connected thermocouple is disconnected or a signal is abnormal, the board will immediately output a fault alarm signal to the upper-level control system. It also marks the faulty channel to help maintenance personnel quickly locate the problem. This function avoids the control system making wrong judgments due to missing or distorted temperature data, thus preventing potential safety hazards such as turbine overheating damage.
Application Scenarios
- Gas Turbine Temperature Control in Thermal Power Plants
In thermal power plants using Mark series control systems, this board connects to thermocouples installed on gas turbine combustion chambers and turbine disks. It processes the collected high-temperature signals and transmits them to the main control system. The system adjusts the fuel injection amount and air intake according to the temperature data to prevent the turbine from being damaged by over-high temperature and ensure stable power generation efficiency.
- Steam Turbine Monitoring in Nuclear Power Auxiliary Systems
In nuclear power plants, auxiliary steam turbines are responsible for driving water pumps and fans. This board monitors the exhaust temperature and bearing temperature of the steam turbine. Its high-precision measurement and stable signal transmission ensure that the control system can timely detect abnormal temperature rises, avoid equipment damage caused by overheating, and maintain the stable operation of the auxiliary system.
- Petrochemical Gas Turbine Compressor Control
Petrochemical plants often use gas turbines to drive natural gas compressors. This board processes the temperature signals of the compressor’s cylinder and piston parts. It adapts to the harsh working environment with high oil fume and vibration in petrochemical sites, ensuring that the control system can adjust the compressor’s operating speed according to temperature changes and preventing compressor failure due to overheating.
- Maintenance of Legacy Turbine Control Systems
Many industrial enterprises still operate early Mark series turbine control systems. When the original temperature signal processing board fails, replacing it with DS38002TCF1A1A can quickly restore the temperature monitoring function of the system. This replacement avoids long-term shutdowns caused by component outages and reduces economic losses for enterprises.
- Marine Auxiliary Turbine Temperature Monitoring
In large ships equipped with GE marine turbines, this board is used in the auxiliary turbine control system to monitor the temperature of the turbine’s transmission mechanism and exhaust pipe. Its compact structure and strong environmental adaptability can cope with the marine environment with high humidity and frequent vibration, ensuring the auxiliary turbine provides stable power for ship navigation, communication, and other systems.
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