How to Wire Discrete DC Sensors to PLC – Part 1

Overview

This video explains how to wire discrete DC sensors to a PLC, focusing on the fundamentals of connecting field devices to control systems.

It covers key concepts such as sourcing (PNP) and sinking (NPN) configurations, which are essential for proper wiring and signal transmission between sensors and PLC inputs.

Understanding these wiring methods is critical to ensure reliable operation and correct signal detection in industrial automation systems.

What You Will Learn

• How to wire discrete DC sensors to a PLC
• Difference between PNP (sourcing) and NPN (sinking)
• Basic wiring diagrams for PLC inputs
• How PLC reads digital signals from sensors
• Common mistakes in sensor wiring

Applications

• Industrial automation systems
• Sensor integration with PLCs
• Machine control and monitoring
• Conveyor and production systems
• Packaging and manufacturing lines
• Troubleshooting field wiring in control panels