C o m p a c t B o a r dP C M - Q M 7 7Chapter 2 Quick Installation Guide2-346NC7NC8NC9NC/+5V/+12VPWR+5V/+12V10NCNote:COM2 RS-232/422/485 can be set by BIOS setting. Default isRS-232. COM2 Pin 9 function can be set by JP6.2.35 COM Port 1 (CN16)RXDTRDSRCTSNCDCD12910TXGNDRTSRIPinPin NameSignal TypeSignal Level1DCDIN2RXIN3TXOUT±9V4DTROUT±9V5GNDGND6DSRIN7RTSOUT±9V8CTSIN9RIIN10NC