User manual

CONTROLLINO Instruction Manual Page 13 (31)
Inputs (A0 to A…)
The CONTROLLINO PLCs have a variety of digital and analog inputs which are suitable for collect-
ing various data or states. The inputs for analog and digital signals are on the same screw termi-
nals and can be configured and queried differently depending on the application.
Inputs for analog use
The inputs with the labels "A0" to "A.." are used for the measurement of analog voltage values,
based on the mass potential of the CONTROLLINO controls. This allows to measure electrical volt-
ages, for example the output signal of a sensor that depends on certain physical sizes.
The data logging works with the internal A/D converter of the microcontroller and has a resolution
of 10 bit and delivers values from 0 to 1023.
CONTROLLINO uses an automatic voltage divider internally which is controlled over the supply
voltage. Depending on the supply voltage the divider is switched to the right value.
If you use a 12V supply voltage the measured value can be between 0-13,2V.
1 digit = 0,015V (15,0mV)
If you use a 24V supply voltage the measured value can be between 0-26,4V.
1 digit = 0,03V (30,0mV)
The scaling factor is:
Operating voltage
Divider ratio
@12V
3,06
@24V
6,14
INFO: all inputs are protected against electrostatic discharging and overvoltage (ESD-protection).