There are many vendors and sources of PLCs: Automation Direct, FactoryMation, B&B Electronics, and yes, even eBay, among others. I will use the Click PLC available from Automation Direct as an example ...

Rockwell Automation announces the new Allen-Bradley Micro820 programmable logic controller (PLC), a new addition to the Allen-Bradley Micro800 PLC family. The 20-point Micro820 controller features ...

PLC Logic is a compact microcontroller that plugs a small housed logic module, programmable with LOGIC software, directly into relays, allowing users to switch and control up to 48 I/O signals with a ...

But more severe failure poses a safety hazard to personnel. When products or applications are used for safety functions—for example a light curtain, a safety programmable logic controller (PLC), a ...