Hardware Installation
For the initial set-up, the plastic DIN rail case must be removed to access the circuit
boards and internal connectors.
The case also needs to be opened to connect a USB cable to the programming port of the
Arduino board, and if the factory configuration of the internal jumpers for the RS-485
termination resistors or digital input configuration must be changed (see below).
Before opening the Iono MKR case, disconnect all power sources and any connection to
external devices.
Opening the case
Follow these steps, in the exact order, to open the case:
1. Remove the green pluggable terminal blocks
2. Remove the black plastic DIN rail hook
3. With a small flat screwdriver gently separate the bottom case and boards assembly
from the top cover
4. The circuit boards assembly will simply slide out of the case, as it is mechanically held
in place by the bottom case only
Closing the case
5. Replace the circuit boards assembly inside the case; ensure that the terminal block
connectors are aligned with the opening in the case
6. Replace the case bottom, then gently push the other side in place
7. Replace the black plastic DIN rail hook.
OPENING AND CLOSING THE CASE
NOTICE
15
Iono MKR User Guide
