Advantech UTC-315 - Table A.12:CN18: COM1

35 UTC-315 User Manual
Appendix A I/O Pin Assignments
UART RS485 Auto Flow Control
COM2 supports RS485 auto flow control function for all UART.
When enabling the RS485 auto control function, it will automatically drive RTS# pin
to logic high or low for flow control.
To make this RS485 auto flow control function work, please be noted that the parity
and stop-bit setting has to be one of the following three settings:
(1) 8 data bits + 1 parity bit + 1stop bit
(2) 8 data bits + 1 parity bit + 2 stop bits
(3) 8 data bits + 2 stop bits
Table A.12: CN18: COM1
Part Number 1655000197
Footprint WF_5x2P_79_BOX_D_P1R
Description 1655_WF_5x2P_79_BOX_D_P1R_0.Normal
Pin Pin name
1 DCD
2RXD
3TXD
4DTR#
5GND
6DSR#
7RTS#
8CTS#
9RI#
Table A.13: CN21: Power switch
Part Number 1655302020
Footprint WF_2P_79_BOX_R1_D
Description WAFER BOX 2P 2.0mm 180D(M) DIP A2001WV2-2P
Pin Pin name
1 PSIN
2GND