Serial Port Connector (Com1 & Com2 ); Digital I/O Connector (Jdio) - Avalue Technology ENX-PNV User Manual

1.7.6 Serial Port Connector (COM1 & COM2 )
These 2 connectors are for serial (COM) port. Connect the serial port module cable to this
connector, and then install the module to a slot opening at the back of the system chassis.
1.7.7

Digital I/O Connector (JDIO)

This connector supports 8-bit General purpose I/O function.
User's Manual
COM 1&2
ENX-PNV 25