A PLC panel is a special steel box that contains electrical components required to run a factory machine or process.  PLC stands for Programmable Logic Controller, an industrial hardened computer usually found inside factory control panels.  High voltage components are what makes up a lot of the other items found inside.  

• PLC based automation systems are used for automatic control of various processes & systems in plant and machines.
• PLC comprises of digital I/O s, analog I/O s, special function modules etc.
• PLC Panels can be used in combination of HMI, SCADA to facilitate operation.