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I, DO, AI & AO — The 4 Building Blocks of PLC I/O
DI, DO, AI & AO — The 4 Building Blocks of PLC I/O!
Understanding PLC I/O is essential for anyone working with automation and control systems.
+ DI — Reads ON/OFF signals
+ DO — Sends ON/OFF commands
+ AI — Reads continuous signals like 4–20 mA / 0–10 V
+ AO — Sends continuous signals for devices like VFDs and control valves
Save this guide for your PLC learning journey!
#PLC #PLCProgramming #IndustrialAutomation #Instrumentation #TechLearning
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