LESSON H5P - Programmable Logic Controllers vs Most Other Computing Devices
Features.
The
main difference from most other computing devices is that PLCs are intended-for
and therefore tolerant-of more severe conditions (such as dust, moisture, heat,
cold), while offering extensive input/output (I/O) to connect the PLC to
sensors and actuators. PLC input can include simple digital elements such as
limit switches, analog variables from process sensors (such as temperature and
pressure), and more complex data such as that from positioning or machine
vision systems. PLC output can include elements
such as indicator lamps, sirens, electric motors, pneumatic or hydraulic
cylinders, magnetic relays, solenoids, or analog outputs. The input/output
arrangements may be built into a simple PLC, or the PLC may have external I/O
modules attached to a computer network that plugs into the PLC.
Please, make sure you know how to properly pronounce the highlighted words.
