Multi-mode inputs: analog mode
iono 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÷5V 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 module.
DI5 and DI6 digital inputs
All specifications in the previous point apply to both DI5 and DI6 digital inputs connections.
Analog output
iono features a 0÷10V output (AO1) which can be controlled by the PWM function of the
Arduino platform; the 0÷100% duty cycle of PWM signal corresponds to a 0÷10V output
voltage.
This is a sink/source output (the current direction at this output can be both positive and
negative).
Relay digital outputs
iono features 6 power relay outputs which can withstand high inrush currents thanks to the
special contact built.
These relays have bistable coils, which are powered only for the short time needed to
move the contact from one position to the other one.
This guarantees very low total current consumption and low power dissipation resulting in
lower self-heating. It also maintains ”mechanical memory” in case of module power supply
failure.
A dedicated internal circuit manages the relay coils, matching the closed status of each
relay to the high state of the related control pin of the Arduino platform.
Asynchronous serial communication port
iono features a 3-way terminal block for the connection to an asynchronous serial external
device. Pins TX and RX of the terminal block are connected to the related pins TX and RX
of the Arduino platform, through two protection series resistors.
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Hardware Guide
