
PLC Inputs and Outputs: DI, DO, AI, AO Explained (2026)
This comparison table shows the key differences between all four PLC input and output signal types at a glance —

This comparison table shows the key differences between all four PLC input and output signal types at a glance —

Input/Output (I/O) Capabilities of PLCs How do PLCs handle input and output signals? Input and output signals are a core

This tutorial covers the core concepts of connecting input devices (pushbuttons, sensors, switches) to PLC inputs,

In the world of industrial automation, nothing happens without PLC input and output. These are the essential channels

Introduction Switches are fundamental components in electrical and electronic systems, responsible for controlling the

INDUSTRIAL AUTOMATION Input Devices, Output Devices, and Operator Interface A wide variety of sensors, switches, and other

PLC analog output modules Let''s move on to analog PLC output modules. Analog PLC Outputs control devices such

Switches and Sensors Industrial Switch Types | Toggle, Push Button, Selector Switch, Etc. An electrical switch is any device used to

How do PLCs handle input and output signals? Input and output signals are a core component of a PLC''s operation. Discrete DC,

Learn what selector switches are, how they work, and their key types used in industrial control systems. Explore their functions,

This application brief describes how to build an eight-channel configurable digital I/O module using a standard high-side switch

Learn PLC input output wiring basics. Connect switches, relays, and control devices to PLC inputs and outputs with

Read Chapter 1 of The Digital I/O Handbook: A Practical Guide to Industrial Input and Output Applications.

Some examples of discrete input devices would be things like light switches, push-buttons and proximity switches.

Discover safe, practical methods for wiring electrical switches in industrial control panels with step-by-step diagrams,

In this article, we are sharing the basic concepts of PLC and DCS control systems Wiring Diagrams for Digital Input

High-speed counter modules: used for counting fast input signals, such as those from encoders or proximity sensors.

Learn what input and output modules in a PLC are – their types, functions, and how they connect and control

Practical Industrial Applications Understanding the applications of PLC input and output devices can help you appreciate their

Input modules are tailored to receive signals from devices like sensors and switches, discerning information such as

What is Digital Input (DI)? A digital input (DI) is a type of signal that can only have discrete values, typically binary, like 0

The document provides an overview of industrial discrete control input switches and output devices, detailing their functions, types,

However, the working principle of a PLC system is not as simple as such. Because to control a process or machinery,

Learn how industrial remote Input/Output Systems work, their advantages, drawbacks, and the role of Ethernet

Input modules detect the status of input signals, such as push buttons, switches and sensors. The output modules

Explore various types of instrumentation switches used in industrial automation, including pressure, level, flow, and
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