How to Apply an Isolated Power Module in Signal Isolation

How to Apply an Isolated Power Module in Signal Isolation

Signal transmissions are everywhere. In industrial applications, such as electric vehicle (EV) charging stations and automation systems with programmable logic controllers (PLCs), there is a high voltage (up to several kV) that can be dangerous to the human body. This type of hazardous voltage can also pass through the signal line, which can cause signal interference and could eventually destroy the terminal electronic devices. Moving signals and power across an isolation barrier is a method that can help overcome these challenges. This article will provide an overview regarding signal isolation in reference to a serial peripheral interface (SPI), as well as RS-232, RS-485, and CAN interfaces. It will also explain how isolated power modules can be used for signal isolation by using the MIE1W0505BGLVH, an easy-to-use and ultra-small power module solution, as an example.