ADLINK EXP-ISO-COM8 - Manual (Page 21)

TME-EXP-ISO-COM8-R1V0 Rev 1.0 16 (24)
Pin RS232 RS485 Pin RS232 RS485
1 DCD Not used 2 DSR RXD+
3 RXD RXD- 4 RTS TXD+
5 TXD TXD- 6 CTS Not used
7 DTR Not used 8 RI Not used
9 ISOGND ISOGND 10 Not used Not used
Pin 1 is marked with a small arrow