Types of PLC

Types of PLC:-

        There are two types of PLC according to their constructions

1. Compact Type:-

• In Compact PLC CPU unit, Communication Port, Power Supply unit, Inputs and Outputs all are mounted on a single board.
• I/O capacity of Compact PLC is less than I/O capacity of Modular PLC.
• Generally used for small applications such as Hydraulic press machine, any Special Purpose machine (SPM), etc.        

Photos:-

 1. These are the Photos of Compact PLCs and these are Rail Mounted Compact PLC.

2. In this Pic "PLC with Expansion Module".

2. Modular PLC:-

• In Modular PLC consisting separate parts as described below:-

1. Base Rack,
2. Power Supply Module,
3. CPU Module,
4. Input Modules,
5. Output Modules,

• I/O capacity of Modular PLC is more than I/O capacity of Compact PLC.
• Generally used for large Application Such as Plant Automation, Power Plant Handling, etc.
• In Modular PLC there is also some Small PLC ( i.e. Nexgen 2K, Nexgen 5K) available which we can use in Small applications.

PHOTOS:- 

       1. Base Rack

 

        2. Modular PLC