To enhance the quality of manufacturing as responsibility, build national brand of measurement!
To enhance the quality of manufacturing as responsibility, build national brand of measurement!
OneOverview of DMC300 distributed measurement and control system
Figure 1.DMC300 distributed measurement and control system
DMC300 distributed control system is a kind of research and development for the Hunan YINHE ELECTRIC power automation and industrial control field electromagnetic environment of increasingly complex distributed control system with field bus technology, optical fiber front-end based on Digital Technology (DCS system).
DMC300 distributed control system by the Milky Way electrical self-developed DM series distributed test sub-station, distributed I/O DC series DMC300 digital host and installed on the PC DMC300 distributed system software etc.. In front of the input signal by distributed control sub-station is converted into a digital signal, the digital DMC300 between the fiber and the host for data exchange, AnyWay-bus field bus technology using optical fiber communication independent research and development, and the host computer monitoring and control management software can quickly build a high performance and flexible expansion of the virtual instrument measurement and control system.
In order to better realize the needs of the new generation of Internet of things, DMC300 distributed measurement and control system can be connected to the external network through the network interface to achieve data exchange and resource sharing.
TwoDMC300 distributed measurement and control system
1Front-end digitizing
Distributed measurement and control subsystem of the distributed measurement and control system in DMC300 station measured point (controlled point) near the front end of the digital technology, analog transmission to digital transmission of common personality change, so that the module can realize system topology through field bus technology, adapt to the changing and increasingly complex control requirements, simplify the scene line and reduce wiring requirements, enhance the system's expansibility. The nearest installation and the optical fiber transmission can avoid the noise interference of the measured signal and the control signal in the source and the conduction interference in the data transmission, thus greatly improving the measurement accuracy and the control reliability.
2Strong independence
DMC300 distributed measurement and control system of the distributed measurement and control sub-station modular structure, strong independence. Maintenance, improvement, etc. do not affect other parts of the system, easy disassembly, easy to measure traceability.
3Centralized management
Compared with the special instrument, the DMC300 distributed measurement and control system realizes the centralized management of the equipment level through the host computer software. In addition to the measurement and control of the centralized display of the object, but also through the communication broadcast function of all modules on the optical fiber bus synchronous start sampling, response to the acquisition of the relevant parameters, control synchronization and real-time requirements.
4Personality design
DMC300 distributed measurement and control system of distributed measurement and control sub-station in the design concept focuses on the distributed system to be measured and controlled by the individual needs of the object. For example, signals such as temperature and humidity changes slowly, with low cost and high precision, integral AD, can achieve the high precision test, and can eliminate the influence of electromagnetic interference; resistance measurement by proportion method, the reference signal without stability, can achieve high measurement accuracy; low frequency signal the high pass filter, high frequency signal by blocking the coupling capacitance, can simplify the circuit design, but also can improve the test results.
5High efficiency
DMC300 distributed control system using optical fiber transmission in high speed serial bus based on the YINHE ELECTRIC self-developed, the sampling rate and the communication rate can be comparable with the acquisition card, the highest sampling rate of 100ksps/ channel, and multi-channel synchronous sampling can be realized, which can meet the dynamic measurement of various industrial complex electrical parameters and non-electric parameters, will not lost every detail of the signal.
ThreeSchematic diagram of DMC300 distributed measurement and control system
Figure 2. DMC300 topology of distributed measurement and control system
OneSub station selection of DMC300 distributed measurement and control system
According to the requirements of field measurement and control, you can select the sub station of the distributed system flexibly: DM series distributed test sub station, DC series distributed I/O sub station, transparent transmission and protocol conversion module.
DMC300 distributed measurement and control system sub station selection table
TwoApplication example of MC300 distributed measurement and control system
Application example of DMC300 distributed measurement and control system
| Model | Name | Performance parameter |
| DMC300 | Distributed measurement and control digital host | Working power：+5VDC Host computer interface：RS232/USB2.0 Measurement module interface：ST fiber interface/RS485 Polling mode：Support custom query Polling period：2～100,000 times per second Power waste：≤2W |
| DM4021 | Single channel frequency measurement sub station | Signal type：AC or DC pulse signal Frequency range：0.1Hz~50kHz Amplitude range：2Vpp~30Vpp Accuracy：0.02%rd |
| DM4022 | Dual channel frequency measurement sub station | Signal type：AC or DC pulse signal Frequency range：0.1Hz~50kHz Amplitude range：2Vpp~30Vpp Accuracy：0.02%rd |
| DM4024 | Four channel frequency measurement sub station | Signal type：AC or DC pulse signal Frequency range：0.1Hz~50kHz Amplitude range：2Vpp~30Vpp Accuracy：0.02%rd |
| DM4031 | Four channel temperature measurement sub station | Signal type：PT100 Temperature range：-40℃~400℃ Accuracy：0.1%rd±0.5℃ |
| DM4032 | Eight channel temperature measurement sub station | Signal type：PT100 Temperature range：-40℃~400℃ Accuracy：0.1%rd±0.5℃ |
| DM4041 | Four channel 4~20mA measurement sub station | Signal type:4~20mA、0~20mA、0~5V Accuracy:0.1%rd±0.1%fs |
| DM4042 | Eight channel 4~20mA measurement sub station | Signal type：4~20mA、0~20mA、0~5V Accuracy：0.1%rd±0.1%fs |
| DM4101-1 | DC power measurement sub station | Voltage measurement range：3V~750V Current measurement range：4mA~1A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4101-2 | DC power measurement sub station | Voltage measurement range：3V~750V Current measurement range：25mA~6A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4101-3 | DC power measurement sub station | Voltage measurement range：3V~750V Current measurement range：1mV~250mV Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4102-1 | DC power measurement sub station | Voltage measurement range：6V~1500V Current measurement range：4mA~1A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4102-2 | DC power measurement sub station | Voltage measurement range：6V~1500V Current measurement range：25mA~6A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4102-3 | DC power measurement sub station | Voltage measurement range：6V~1500V Current measurement range：1mV~250mV Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4103-1 | AC power measurement sub station | Frequency range：5~400Hz Voltage measurement range：4V~1000V Current measurement range：4mA~1A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4103-2 | AC power measurement sub station | Frequency range：5~400Hz Voltage measurement range：4V~1000V Current measurement range：25mA~6A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4104-1 | AC power measurement sub station | Frequency range：5~400Hz Voltage measurement range：0.5V~120V Current measurement range：4mA~1A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4104-2 | AC power measurement sub station | Frequency range：5~400Hz Voltage measurement range：0.5V~120V Current measurement range：25mA~6A Voltage / current measurement accuracy：0.1%rd±0.1%fs Power measurement accuracy：0.2%rd±0.2%fs |
| DM4105-1 | Three phase voltage measuring station | Frequency range：5~400Hz Voltage measurement range：0.5V~120V Voltage measurement accuracy：0.1%rd±0.1%fs |
| DM4105-2 | Three phase voltage measuring station | Frequency range：5~400Hz Voltage measurement range：4V~1000V Voltage measurement accuracy：0.1%rd±0.1%fs |
| DM4107-1 | Three phase voltage measuring station | Frequency range：5~400Hz Current measurement range：4mA~1A Current measurement accuracy：0.1%rd±0.1%fs |
| DM4107-2 | Three phase voltage measuring station | Frequency range：5~400Hz Current measurement range：25mA~6A Current measurement accuracy：0.1%rd±0.1%fs |
| DC0602 | Distributed I/O sub station | Sub station function：6 channel switch detection and 2 channel relay control Input channel：6 ways passive contact input Output channel：2 ways relay output，220V/1A Communication mode：Fiber bus |
| DC0404 | Distributed I/O sub station | Sub station function：4 channel switch detection and 4 channel relay control Input channel：4 ways passive contact input Output channel：4 ways relay output，220V/1A Communication mode：Fiber bus |
| DC1204 | Distributed I/O sub station | Sub station function：12 channel switch detection and 4 channel relay control Input channel：12 ways passive contact input Output channel：4 ways relay output，220V/1A Communication mode：Fiber bus |
| DC0400 | Distributed I/O sub station | Sub station function：4 channel switch detection Input channel：4 ways passive contact input Output channel：None Communication mode：Fiber bus |
| DC0800 | Distributed I/O sub station | Sub station function：8 channel switch detection Input channel：8 ways passive contact input Output channel：None Communication mode：Fiber bus |
| DC0008 | Distributed I/O sub station | Sub station function：8 channel relay control Input channel：None Output channel：8 ways relay output，220V/1A Communication mode：Fiber bus |
| DC0016 | Distributed I/O sub station | Sub station function：16 channel relay control Input channel：None Output channel：16 ways relay output，220V/1A Communication mode：Fiber bus |
China's leading enterprise in variable frequency power measurement and metering
National variable frequency power measuring instrument (metering station) founder
Research and development unit of national variable frequency power metering standard