AAEON TKS-G21-CV05 - Manual (Page 21)

E m b e d d e d B o x T K S - G 2 1 - C V 0 5
Chapter 2 Quick Installation Guide 2 - 7
2.5 COM Port #2 RS-232/422/485 Selection (CN19)
COM2 RS-232/422/485 selection for AAEON TKS series is set in BIOS setting
as following:
Entering BIOS Setting Menu: Choose "Integrated Peripherals

Super IO
device

COM2 select". (Default setting is at "RS-232")
Different devices implement the RS-232/422/485 standard in different ways. If
you have problems with a serial device, check the pin assignments below for
the connector.
RS-232 Mode
Pin Signal Pin Signal
1 DCDB 2 DSRB
3 RXB 4 RTSB
5 TXB 6 CTSB
7 DTRB 8 RIB / +5 Volt. / (+12 Volt.)
9 Ground 10 N/C
RS-422 Mode
Pin Signal Pin Signal
1 TXD- 2 N/C
3 RXD+ 4 N/C