Radwell International’s Blog

What is the difference between AC and DC?

 There are two types of electrical currents; direct currents and alternating currents. These are the two-ways electricity flows and is simply the movement of electrons through a conductor. The Direct current was first brought to us by Thomas Edison in the 1800s.  Following, the next type of electrical currents to emerge was alternating currents. During the beginning of this “War of The Currents”, Thomas Edison and Nikola Tesla were in a bitter rivalry.

What is an HMI?

HMI stands for Human-Machine Interface.

A Human-Machine Interface (HMI) is a user interface that connects a person to a machine. HMI can technically be applied to any screen that allows a user to interact with a device. It is most commonly used in the context of an industrial process.