E P I C B o a r d E P I C - 5 5 3 6Chapter 2 Quick Installation Guide 2-142.20 COM1/2 Connector (CN5)COM1 (Up)Pin Signal Pin Signal1 DCD1 2 RXD13 TXD1 4 DTR15 GND 6 DSR17 RTS1 8 CTS19 RI1COM2 (Down)Pin Signal Pin Signal1 DCD2 (422TXD-/485DATA-) 2 RXD2 (422RXD-)3 TXD2 (422TXD+/485DATA+) 4 DTR2 (422RXD+)5 GND 6 DSR27 RTS2 8 CTS29 +12V/+5V/RI22.21 Power Connector (CN6)Pin Signal1 GND