MOLEX MicroFit 6 pins connectors
On the same side of power connector, the SXPi is equipped with two connectors of kind MOLEX MicroFit
6pins and named P9, P1 . On these two connectors the following signals are available:
•2 x photcoupled input (VIN max 24V CC)
•2 x open collector output (max current 5 mA)
•1 x RS232 serial port
The two pinouts are described in the following picture:
Picture 7 – Pinout of MicroFit connectors
Connection GPIO with the processor:
Device GPIO Raspberr Pi PIN Raspberr Pi Direction
Input Photo-coupled 1 1 19 IN
Input Photo-coupled 2 9 21 IN
Open Collector 1 8 24 OUT
Open Collector 1 7 26 OUT
To drive two optional external relays, you must follow the connections described in the following schematics:
Picture 8 – Schematics for external relays connection
The RS232 serial port available on the MicroFit P1 connector is accessible by the Linux System on the
device: /dev/tt USB0.
User Manual SXPi Page 5
