Industrial I/O Modules Explained: Digital vs. Analog, Selection Checklist, and Best Practices
Explains how industrial I/O modules bridge sensors, actuators, and controllers, comparing digital (on/off, high‑speed counting) and analog (4–20 mA, 0–10 V, RTDs/TCs) capabilities. Covers isolation, channel density, diagnostics, resolution, sampling, accuracy, and noise practices. Provides a structured selection checklist—device mapping, performance, environment, safety, scalability, compatibility, compliance, support, and total cost. Includes practical scenarios for packaging, boilers, and high‑speed assembly, plus buying tips: prefer 4–20 mA on long runs, use shielded twisted pair, enable filtering/debounce, and leave spare channels.
