The three ways to control a VFD from a PLC: discrete I/O, an analog speed signal, or a network. Wiring, drive settings and tips for each.
How an MPCB combines short-circuit and adjustable overload protection for a motor, how it compares with breakers and overload relays, and how to set it.
Contactors and relays both switch circuits with a coil. How they differ in current, contacts, arc handling and use, plus how motor starters fit in.
What the two digits in an IP rating mean, the real difference between IP67, IP68 and IP69K, how NEMA ratings compare, and how to pick for washdown and outdoor use.
What flush (shielded) and non-flush (unshielded) proximity sensors are, how much range each gives, and how to mount them so they don't false-trigger.
Incremental encoders count pulses; absolute encoders report a unique position. Outputs, resolution, single- vs multi-turn, and how to choose for your axis.
The four most common industrial Ethernet protocols compared: who backs them, speed and determinism, hardware needs, and how to choose.
How Modbus RTU and Modbus TCP differ, what they share, how to wire RS-485 correctly, and the register-addressing mistakes that waste the most time.
What Safe Torque Off means on a drive, how it differs from an E-stop or lockout, stop categories, and typical STO wiring.
