The fourth revolution in manufacturing and process automation, often referred to as Industry 4.0, will advance on the backbone of connected systems: sensors, actuators, and control systems, all linked through networks via the internet protocol. Sensor data will be analyzed to optimize manufacturing, predict failures, schedule maintenance and automatically replenish inventory. This poses a considerable challenge for programmable logic controller (PLC) design engineers who are required to pack more functionality into enclosures that keep getting smaller. Higher input/output (I/O) density and smaller form factors also add to the design challenge in another basic way: the system must be more power efficient than ever to prevent the PLC from overheating, especially in an application where fans and vents are generally not acceptable.
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