Nowadays, many transmitters use current signal output, such as pressure transmitters, liquid level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters, etc. The output range of the current output type transmitter is 4~20mA, and when the current output type transmitter outputs the minimum current and the maximum current, it represents the minimum and maximum rated output values calibrated by the current output type transmitter, respectively. 4- 20mA can power the transmitter on its own. The transmitter acts as a special load in the circuit, and the special point is that the current consumption of the transmitter varies between 4 and 20 mA depending on the sensor output. This transmitter only needs to be connected to 2 wires, so it is called a two-wire transmitter. The industrial current loop has a standard lower limit of 4mA, so the transmitter has at least 4mA of power supply as long as it is within the range. This makes it possible to design and use two-wire transmitters. The wiring treatment of the current output transmitter is as follows:

From the foreign industry dynamics and the supply and demand of the transmitter can be a little known, the current output transmitter should be installed on the power line of the field equipment when used, and the monitoring system with the single-chip microcomputer as the core is located in the monitoring room far away from the equipment site, and the two are generally tens to hundreds of meters away or even farther away. The environment of the equipment site is relatively harsh, strong electrical signals will produce various electromagnetic interference, and lightning induction will produce strong surge pulses, in this case, a thorny problem encountered in the single-chip microcomputer application system is how to reliably transmit small signals over long distances in harsh environments. The emergence of current output transmitters solves this problem well. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi, 400-600-4496!