Digital High-Speed Signal Isolation and Transmission Module Solution
#Solutions ·2026-01-09 11:40:00
Signal Isolation and Transmission Solution for Power Measurement and Control Systems
In various automated measurement and control systems, such as power monitoring, railway communication, and industrial PLC control, voltage and current signals output by sensors and transmitters are susceptible to common-mode interference, electromagnetic interference, and other disturbances during transmission. This can lead to signal distortion, transmission delays, and ultimately affect measurement accuracy and system stability.
Additionally, potential differences between devices may cause signal crosstalk or even damage core measurement and control components. High-speed transient waveform acquisition, harmonic analysis, and other scenarios impose higher demands on signal transmission speed and accuracy. Traditional signal isolation and transmission equipment often suffers from poor isolation, insufficient accuracy, slow response, and inconvenient installation, making it difficult to adapt to complex industrial environments and high-precision measurement requirements.
To address these challenges, a dedicated signal isolation and transmission solution has been developed based on the SPS Series Signal Isolators and the SPS9-ND Series Digital High-Speed DC Signal Transmitters, enabling precise isolation, stable conversion, and high-speed transmission of signals.
I. Core Product Selection: SPS Series Signal Isolators and SPS9-ND Series Transmitters
This solution centers on the SPS Series Signal Isolators, with the SPS9-ND Series Digital High-Speed DC Signal Transmitters serving as the core processing units.
Designed with precision based on a new generation of embedded systems, these products are characterized by "high precision, high isolation, high speed, and low drift," making them fully adaptable to the signal processing needs of diverse scenarios such as power systems, railways, and industrial control.
(1) Core Configuration
The SPS Series Signal Isolators employ high-speed optocoupler isolation technology, converting input voltage and current signals into linearly isolated output voltage and current signals. The output signals rapidly track changes in the input signals, ensuring real-time and accurate signal transmission. The SPS9□□□-ND Series, as digital high-speed DC signal transmitters, further optimizes performance with built-in TI-specific ADC high-speed chips and advanced successive approximation register (SAR) high-precision analog-to-digital converters. With a resolution of up to 16 bits and measurement accuracy better than 0.05%, these devices achieve internal electrical isolation among power supply, input, and output, fundamentally addressing common-mode interference, electrical isolation, and signal standardization in signal transmission.
(2) Installation and Power Supply Design
The products feature an independent power supply mode to ensure operational stability unaffected by external power fluctuations. The installation method adopts a DIN 35mm standard rail design, aligning with industrial on-site standardized installation requirements. This enables simple and convenient on-site installation and flexible deployment within the signal chains of various measurement and control systems, meeting the layout demands of different on-site environments.
II. Core Advantages of the Solution
(1) High-Precision Transmission: Reliable and Accurate Data
Leveraging TI-specific ADC high-speed chips and 16-bit SAR analog-to-digital converters, the SPS9-ND Series achieves measurement accuracy better than 0.05%, enabling precise capture of minute signal changes. Linear conversion technology ensures highly synchronized output signals with no distortion, providing accurate data support for high-precision scenarios such as high-speed transient waveform acquisition and harmonic analysis.
(2) Triple Isolation Protection: Exceptional Anti-Interference Capability
The SPS Series utilizes high-speed optocoupler isolation technology, while the SPS9-ND Series further implements triple electrical isolation among power supply, input, and output. This effectively blocks external interferences such as common-mode interference, electromagnetic interference, and surge voltages, preventing signal crosstalk and potential differences from damaging equipment. It also isolates the interaction between front-end sensors/transmitters and back-end measurement and control devices, ensuring the stable operation and safety of the entire signal chain.
(3) High-Speed Response: Adaptable to Dynamic Measurement Needs
The combination of high-speed optocoupler isolation and dedicated ADC high-speed chips significantly enhances signal response speed. Output signals rapidly track changes in input signals, enabling delay-free transmission. This is particularly suitable for scenarios with high demands on signal transmission speed, such as high-speed transient waveform acquisition and fast monitoring and alarm systems, ensuring timely capture of signal dynamics and rapid triggering of response mechanisms.
(4) Easy Installation: Adaptable to Diverse On-Site Environments
The DIN 35mm standard rail installation method complies with universal industrial on-site installation standards, eliminating the need for complex installation and debugging processes. The products can be quickly integrated into existing measurement and control systems. The independent power supply mode adapts to different on-site power conditions, and flexible installation locations make it easy to meet the application demands of complex environments such as power stations, railways, and industrial plants.
(5) Low Drift Characteristics: Stable Long-Term Operation
With precision circuit design and high-quality components, the products exhibit low drift characteristics, effectively minimizing the impact of environmental temperature changes and prolonged operation on signal transmission accuracy. This ensures stability and reliability during long-term continuous operation, reducing the frequency and cost of later maintenance.
III. Typical Application Scenario Solutions
(1) Power Measurement and Control Systems
In power systems, signals output by voltage and current sensors need to be transmitted to measurement and control terminals for electricity metering, fault monitoring, etc. Strong electromagnetic interference and high-low voltage potential differences on-site can easily cause signal distortion. By integrating the SPS9□□□-ND Series transmitters into the signal chain, triple isolation protection resists strong electromagnetic interference, while 16-bit high-precision conversion ensures accurate transmission of voltage and current signals. High-speed response characteristics capture transient voltage/current changes in power systems, supporting harmonic analysis and fault warnings. Standard rail installation facilitates rapid deployment in scenarios such as substations and distribution rooms, and independent power supply ensures stable operation in complex power environments.
(2) Railway Communication and Measurement and Control Systems
In railway scenarios, systems for train operation status monitoring and track signal transmission are susceptible to electromagnetic radiation from trains and environmental interference along the route, requiring high standards for signal isolation and transmission stability. The SPS Series Signal Isolators enable isolated signal transmission between track sensors, onboard transmitters, and measurement and control centers, blocking electromagnetic interference and potential differences. The high-speed response characteristics of the SPS9-ND Series quickly capture dynamic signals during train operation, ensuring real-time updates of monitoring data. Standard rail installation adapts to the standardized layout of measurement and control cabinets along railway lines, and independent power supply ensures stable operation in environments with voltage fluctuations.
(3) Industrial PLC Measurement and Control Systems
In industrial production sites, PLC control systems need to receive signals from numerous sensors and actuators. Electromagnetic interference generated by equipment such as motors and inverters on-site can easily cause signal crosstalk, affecting the precision of production process control. By connecting sensors to PLCs via the SPS Series Signal Isolators, high-speed optocoupler isolation resists electromagnetic interference, and linear conversion ensures accurate signal transmission to PLC controllers. The high-precision characteristics of the SPS9-ND Series adapt to scenarios with stringent signal accuracy requirements, such as precision machining and process control. Convenient rail installation allows for quick integration into industrial control cabinets, seamlessly interfacing with PLC systems to enhance the stability and precision of production control.
(4) High-Speed Transient Waveform Acquisition Scenarios
In transient waveform acquisition tests for fields such as aerospace and automotive electronics, rapid and accurate capture of signal dynamics is essential. Traditional equipment often suffers from slow response and insufficient accuracy, leading to distorted test data. Leveraging dedicated ADC high-speed chips and 16-bit high-precision conversion technology, the SPS9-ND Series transmitters enable delay-free, high-precision acquisition of high-speed transient signals, outputting standardized signals for easy reception and analysis by data acquisition cards. Triple isolation protection prevents interference signals in the test environment from affecting acquisition accuracy, providing reliable signal data support for product development and performance testing.
(5) Fast Monitoring and Alarm Systems
In safety monitoring systems for high-risk industries such as chemicals and metallurgy, abnormal changes in parameters like temperature, pressure, and liquid levels must be quickly detected to trigger alarms. The high-speed response characteristics of the SPS Series products ensure rapid transmission of sensor signals to alarm controllers, providing delay-free feedback on parameter changes. High-precision conversion ensures accurate judgment of alarm thresholds, avoiding false or missed alarms. The isolation protection function prevents interference and potential differences in harsh on-site environments from damaging core alarm equipment, enhancing the reliability of safety monitoring systems and ensuring on-site safety.
IV. Summary of Solution Value
This solution, based on the SPS Series Signal Isolators and the SPS9-ND Series Digital High-Speed DC Signal Transmitters, emphasizes "high precision, high isolation, high speed, and easy installation" as its core advantages. Through scientific product selection and scenario-specific deployment, it comprehensively addresses pain points such as signal transmission interference, insufficient accuracy, and slow response in fields like power, railways, and industrial control. The solution not only achieves precise isolation, linear conversion, and high-speed transmission of signals, ensuring the stability and reliability of measurement and control systems, but also reduces system integration and long-term maintenance costs through standardized installation and independent power supply design. It provides robust signal processing support for accurate measurement, safe operation, and efficient management across various industries.