E m b e d d e d C o n t r o l l e r A E C - 6 9 1 3Chapter 2 Hardware Installation 2 - 112.22 RS-232 Header (COM6)4BPin 2 5 B Signal Pin 5 B Signal1 DCD 2 RXD3 TXD 4 DTR5 GND 6 DSR7 RTS 8 CTS9 RI2.23 RS-232/422/485 Pin Definition (COM7)4BPin 2 5 B Signal Pin 5 B Signal1 DCD 2 RXD3 TXD 4 DTR5 GND 6 DSR7 RTS 8 CTS9 RI2.24 RS-232/422/485 Pin Definition (COM8)4BPin 2 5 B Signal Pin 5 B Signal1 DCD 2 RXD3 TXD 4 DTR5 GND 6 DSR7 RTS 8 CTS9 RIRS-422 mode4BPin 2 5 B Signal Pin 5 B Signal1 TXD- 2 RXD+3 TXD+ 4 RXD-5 GND 6 NC