Youtor
4 20mA Current for Transmitting Analog Signals
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=fzhicu9wp9k
The 4-20mA current loop is widely used in industrial automation for transmitting analog signals from instruments like temperature sensors, pressure transducers, and flow meters to control systems. But why is this particular current range chosen? • The main reason for using the 4-20mA range instead of a 0-20mA or 0-10mA range is that it provides a built-in safety feature. With a 4mA starting point, any current below that can indicate a fault, such as a broken wire or a disconnected sensor. This helps in detecting issues early and ensuring continuous system monitoring. • The current loop is preferred over voltage-based systems because it is less susceptible to signal loss due to resistance in the wiring. As the current remains constant through the loop, it can travel long distances without degradation, which is essential for industrial environments. • Another advantage of using 4-20mA is the ease of calibration. Since the current loop is linear, it provides accurate, scalable measurements, making it easy to interpret and control the data. • In summary, the 4-20mA current loop is the standard for transmitting analog signals due to its reliability, safety, and robustness in industrial applications. The ability to detect faults, ensure accurate measurements, and minimize signal loss makes it the preferred choice in automation systems. • https://zeroinstrument.com/why-is-4-2...
#############################
