What PLC to choose energy-efficient, automated system?
I study faced such a problem:
It is necessary to design an automated system for measuring the temperature in the steam line, the resulting measurements should recover via GPRS modem to the station.
The question lies in the choice of the controller and modem that consume little energy, good between connectada and preferably are protected against temperature(60-80 degrees) and humidity(90%)
Perhaps you know a PLC with low-consumption, which you can hang a thermocouple.
Thank you read this)
if you have the box with electronics 60-80 degrees and even higher humidity, I have bad news for you
the need for small consumption is also not justified
and take Arduino and some sort of sim800 of examples in the Internet the bulk