HPR4748: Programmable Logic Controls - Episode 5

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01 Introduction

This is the fifth episode in an 8 part series.

02

In the previous two episodes we looked at the Allen Bradley PLC 2 and the Siemens S5 series of PLCs.

In those episodes we mentioned I/O modules, but didn't really go into any detail on them.

Instead we looked at the CPU units and focused on things from the programmer's perspective.

03

In this episode we will look at the I/O modules, what they are, how they work, and the purpose that they serve in the system.

In addition to this, I will discuss machine safety systems and also claims made by certain people about cyber security and industrial safety.

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04 What is I/O?