___ Simultaneous wireless transmission and transmission distance between analog and digital signals is 3-10 kilometers.
â– Technical requirements for wireless transmitters:1. The operating power of the wireless transmitting/receiving device shall be AC ​​220V. The transmitting device shall be “fixed†and not in the form of “hand-held remote controlâ€.
2. It can transmit "start" and "stop" switch signals to the inverter.
3, can send 4-20mA given analog signal to the frequency converter.
4. It can receive the 4-20mA actual running signal fed back by the frequency converter. It should have a display on the transmitting device and an output terminal to the upper computer DCS.
5. It can receive the feedback signal fed back by the frequency converter: "prepare signal", "operation signal", "fault signal", should be displayed on the transmitting device, and has output terminals to the upper computer DCS.
6, the launch distance of 1 km.
â– Receiving device technical requirements:1, can receive the start, stop signal, this signal has an output terminal to control the inverter start and stop.
2, can receive 4-20mA inverter given signal, with output terminals, control the inverter running speed.
3, can transmit frequency converter "preparation signal (switch)". With this signal input terminal, inform the DCS that the frequency converter is ready.
4, can launch the inverter "operation signal (switch)". With this signal input terminal, remote monitoring personnel can know if the inverter is running.
5. Can transmit the "actual operating frequency signal (analog quantity)" of the frequency converter. With this signal input terminal, remote monitoring personnel can know the actual operating frequency of the inverter.
6, can launch the frequency converter: "fault signal", with this signal input terminal, remote monitoring personnel can know whether the inverter is faulty.
â– Wireless transmission device function diagram:The DTD122HFEY devices are used in pairs, one for the transmitting device and one for the receiving device.
The device is managed by an intelligent controller and provides 4~20mA signal input and 4~20mA signal output.
The standard 4~20mA current signal output from the transmitter of the industrial site can be collected and transmitted wirelessly.
Remote output 2-wire or 3-wire 4~20mA current signal can be connected to display instruments, PLC or DCS.
The device also provides bi-directional digital signal transmission, which can be used to start the stop signal, and it can also feedback the working status of the device.
DTD120 Dytek's new generation of compact mixed-signal wireless transmitters is a wireless intelligent measurement and control terminal that integrates front-end data acquisition, transmission, and control. It also has resource expansion capabilities.
The industrial-grade mixed-signal wireless terminal can directly replace the traditional wired transmitter to achieve wireless analog acquisition and transmission, solving the difficult problems of the complicated construction of the cable program and the high maintenance cost of the equipment in the later period.
With the use of sensors, transmitters, PLCs, DCS, frequency converters, smart meters, etc., applications that have been successfully customized include:
â—† Yanjing Beer (Guilin Yiquan) Co., Ltd., beer production line automatic control system, 2016
â—† Sinoma (Tianjin) Control Engineering Co., Ltd., Cement Design Institute, Stacker and Reclaimer Project, 2016
â—† Longli Hongshi Cement Co., Ltd., wireless signal monitoring of cement production line equipment, 2016
â—† Siping Zhengtai Electric Co., Ltd., Inverter Water Supply Control System, 2015
â—† Wuhan Kedi Engineering Technology Co., Ltd., Power Plant Equipment Automatic Monitoring System, 2015
â—† Xi'an Luohe Power Plant, wireless monitoring of stacker and reclaimer, 2014
â—† Taiyuan Coking Plant; two-way mixed-signal wireless transmission, 2014
â—† Xinjiang Chemical Plant, one-way mixed-signal wireless transmission terminal, 2014
â—† Gansu Yongdeng Cement Plant, one-way 20-way switch signal wireless transmission, 2014
â—† Beijing Grain Bank; two-way mixed-signal wireless transmission, 2014
â—† Chifeng Thermal Power Plant, blower fan frequency control system wireless monitoring, 2013
Stainless Steel Isolation Pressure Core
Stainless Steel Isolation Pressure Core,Motion Sensor System,Water Sensor Switch,Water Sensor
Shenzhen Ever-smart Sensor Technology Co., LTD , https://www.fluhandy.com