A.4 com2 (cn28), Table a.4: com2 (cn28), A.5 com3 rs-232 serial port (cn38) – Advantech PPC-L128T User Manual

Page 33: Table a.5: com3 rs-232 serial port (cn38), Com2 (cn28), Com3 rs-232 serial port (cn38), Appendix a i/o pin a ssignments