Running 4-20mA Loops over Long Distances
19th December 2018
One of the key advantages 4-20mA loops offer is their ability to operate over longer distances. Many industrial communication protocols, such as Ethernet I/P typically restrict you to cable runs of no more than 100m. This is not very useful for remote applications, where you need to communicate with devices that are located some distance away. 4-20mA loops can be used for cable runs of up to 500m, more in some cases, and offer fast response times, whilst being relatively noise-immune. However, there are some important factors that you need to take into consideration in the design of your