Axiomtek MANO861 - Manual (Page 16)

MANO861 Mini ITX Board
8 Board and Pin Assignments
2.3.4 SelectCOM Connector (SelectCOM)
Select COM for RS-232/422/485.
Pin Signal Pin Signal
1 UART1_RXD 2 COM1_485_RXD
3 UART1_RXD 4 COM1_422_RXD
5 UART1_RXD 6 COM1_232_RXD
7 COM1_BUF_DCD# 8 COM1_BUF_TXD
9 COM1_DCD# 10 COM1_TXD
11 COM1_TXD422- 12 COM1_RXD422+
13 COM1_BUF_RXD 14 COM1_BUF_DTR#
15 COM1_RXD 16 COM1_DTR#
17 COM1_TXD422+ 18 COM1_RXD422-