Multi-mode inputs: analog mode
Iono Arduino features 4 multi-mode inputs (1, 2, 3, 4). Depending on terminal blocks
wiring, digital (ON-OFF), analog 0÷10V or analog 0÷20mA signals can be applied.
When using analog inputs, 0÷10V and 0÷20mA are converted to 0÷3.3V levels in order to
be compatible with the Arduino platform input pins. Both active and passive 0÷20mA (or
4÷20mA) transmitters can be connected, using the C+ terminal as power supply; the
0÷20mA transmitter shown in the schematic here below is a 2-wire passive type.
Multi-mode inputs: digital mode
In digital mode, an external potential free contact can be connected between terminals C+
and DIx (x=1, 2, 3, 4); otherwise, the DIx terminal can be connected to an external voltage
signal (in the range 9÷40V) referred to the GND of the Iono Arduino module.
DI5 and DI6 digital inputs
An external potential free contact can be connected between terminals C+ and DIx (x=5,
6); otherwise, the DIx terminal can be connected to an external voltage signal (in the range
9÷40V) referred to the GND of the Iono Arduino module.
DI5 and DI6 are connected to the Arduino board through a protection network. If you need
to bypass the protection resistors you can move jumpers J1 and J2, respectively for DI5
and DI6, to the BYP position.
DI5-DI6 JUMPERS SCHEMATIC
Note that, with the jumpers in the BYP position, you should limit the maximum voltage
applied to DI5 or DI6 to the voltage levels accepted by the Arduino board installed in Iono
Arduino. Exceeding the Arduino voltage range will result in damage to the Arduino board
and Iono Arduino.
