Uploaded March 2025 | Updated September 2026, 2 weeks ago

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⌚Timestamps:
00:00 - Intro
01:25 - Understanding digital and analog I/O
02:27 - Troubleshooting an input circuit
07:22 - Troubleshooting the output side
10:28 - Wrap-Up

This video explains how to interpret PLC LED status indicators for digital inputs and outputs and how to perform troubleshooting tests using a Digital Multimeter.

You will learn how to test an input circuit containing a PBNC or Push Button normally closed switch connected to an input of an Allen Bradley 1756-IB16 Sinking digital input module.

It also explains an example of a fault condition of PLC's output side, containing a lamp connected to the output of an Allen Bradley 1756-OB16D digital Sourcing output module.

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Course Mentioned in Video:

PLC Hardware Fundamentals: Power, I/O Modules & Signals: realpars.com/courses/plc-hardware-fundamentals

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