plc analog input modules and the switch

The input module will transform electrical signals into digital signals into the PLC system, contrary to the output module. I/O switch quantity input (DI), the switch output (DO) (AI), plc input output modules ,analog input, analog output (AO) module. The switch is the only opening and closing (1 and 0) of two kinds of state signal, analog quantity refers to the continuous variable.

Common I/O as follows, switch, according to the voltage level, 220VAC, 110VAC, 24VDC, by way of isolation, plc analog input module ,isolation and transistor isolation relay.

Plc analog output mod

In or on the time value of the physical quantity called continuous analog, plc digital input output module, respectively, generally with AI / AO, said. PLC analog output mode refers to the amount of the size of the control system is a continuous value in a certain range, such as temperatures, from 0-100, pressure from 0-10MPA, the opening degree of the liquid level from 1-5 meters, electric valve from 0-100%, and so on, these quantities are analog.
Outputs for analog is "analog output plc." The most common places electronic technology, such as DA conversion output is the analog current / voltage (continuously variable current / voltage), plc analog output module of the rectifier circuit is analog. Mathematically, if the physical quantity of an output at time t a (t) form a (t) = F (t) is a continuous function, then the output of the analog.