DI5-DI6 JUMPERS POSITION
Analog output
Iono MKR features a 0÷10V output (AO1) which can be controlled by the DAC0 pin of the
Arduino board; the 0÷3.3V range of the DAC0 pin is converted 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 MKR has four single pole single throw power relays, with normally open contacts.
The relays are driven by distinct digital outputs of the Arduino board.
RS-485 serial port
Iono MKR uses the Arduino UART TX/RX pins to implement a standard RS-485 serial port.
Simply connect the RS-485 A, B and GND to the RS-485 pins of the terminal block.
The RS-485 port is protected from ESD and voltage surges, and supports half-duplex
communication up to to 115200 bps.
The RS-485 TX/RX switching is controlled by a digital output pin of the Arduino board
(pin
4). You should set pin 4 high to enable transmission on the RS-485, and set it low to
allow reception of incoming data.
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Iono MKR User Guide
