In a modern world of engineering, one of the successful innovations ever made is the Programmable Logic Controller or the so called PLC. PLC with Redundant CPU and separate racks for Input/Output Modules In this article, I'm going to share with you how I do the designs for PLC Control Panels based on the previous projects that I have handled. Table of contents 1. Definition of terms2. Essential tools3. Review of project specifications4. Enclosure type5. Panel cover devices6. Internal components7. Auxiliary items Definition of terms What is PLC? Programmable Logic Controller or PLC is a combined hardware and software tool. It function as the brain of the automated system. It monitors feedbacks and input signals by means of Input Modules. Also, it regulates the commands and output