Human Machine Interface: the Basics

There's a lot of confusion surrounding the term "human machine interface" and what it means. Some people believe it's nothing more than a user interface, while others believe it's a type of automated machine. However, both of these answers are incorrect, as HMIs have an entirely different meaning. To learn more about the basics of HMIs and how they are used in today's world, keep reading.

So, what is a HMI exactly? If you asked ten different professionals this question, you would probably get ten different answers. That's because there's no universal standard for HMIs. With that said, however, HMIs share some basic characteristics which define them. Generally speaking, an HMI can best be described as a platform that allows the interaction between a human operator (or operators) and automation equipment. They typically support command inputs, allowing the operator to control the equipment.

HMIs often feature touchscreen interfaces for improved functionality and user satisfaction. Touchscreens are versatile, easy to use, and minimize the amount of required space. All of these characteristics make it an attractive choice when used for HMIs. However, you may also find them with physical buttons. The fundamental characteristic of an HMI is that it allows a human operator to control an automated machine or equipment.

In certain "complex systems,"  the HMI is computerized. Also known as a "human-computer interface," it's used to describe both the hardware and software used to control the physical elements of a complex computer system.