This document summarizes a session on programmable logic controllers (PLCs). It discusses the different types of PLCs, including compact/fixed PLCs which have a fixed number of input/output modules, and modular PLCs which allow adding inputs and outputs. It also covers PLC system sizes, input/output module types, the block diagram and architecture of a PLC, and learning objectives and outcomes from the session. Students are assigned homework on PLC power supplies and connection diagrams.

1. Marathwada Mitra Mandal’s
COLLEGE OF ENGINEERING
Karvenagar, Pune-52
Permanent Affiliated to SPPU |Accredited with 'A' Grade by NAAC | Recipient of ‘Best College Award’ by SPPU
Department of Electrical Engineering
Accredited by National Board of Accreditation (NBA)

2. Session 3
References: T1,T2,T3/R1,R2
Contents:
• Overall PLC System
• Types Of PLC
A Session on
Course: PLC and SCADA
Course Code: 403143A
Unit I: Introduction to PLC
Prof. A. K. Lohate

3. Learning Objectives of topic
Upon completion of the session, student will be able to,
● Explain PLC properly
● Understand the connection of PLC
Learning Outcomes of the session
● The student are able to understand PLC component and their utilisation.
● The students are able to interface I/Os to PLC

4. BLOCK DIAGRAM OF PROGRAMABLE LOGIC CONTROLLER

5. Types of PLC
What is a Compact PLC?
 It is also called as Integrated PLC or Fixed
PLC.
 The compact PLC has a fixed number of
input/output modules along with power
supply and CPU.

7. Types of PLC
What is a Modular PLC?
 It consists of a variable number of inputs and outputs. Inputs and outputs can be added to the
modular PLC systems by the user.
 If you look at the below PLC designing structure, it looks more like a rack. So, it is also called as
rack-mounted PLC.

8. Size of the PLC system
Programmable logic controllers are classified on the basis of their size:
 A small system is one with <500 analog and digital I/Os.
 A medium system has I/Os ranging from 500 to 5,000.
 A system with >5,000 I/Os is considered large.
https://www.electrical4u.com/programmable-logic-controllers/

9. Types of I/O modules

12. FIXED PLC

13. MODULAR PLC

14. Student’s evaluation of main body
1] What are the different types of PLC?
2] Explain architecture of PLC.

15. Assignment for next session
1] What is required power supply for CPU?
2] Draw the PLC connection diagram.

16. Wrap up
Types of PLC, PLC system