ePAQ-9410 / ePAQ-9420 User’s Guide UG-1071Copyright © 2017 QEI Communications Ports 256.9.3 RS-232/RS-485 Connections(DB9 - eXP9425 only):Designations: RS232/RS485Connector Type: DB9Port Speed: 1200 to 115.2 kbps6.9.4 Recommended cable type :RJ45 - Use CAT 5e cable or similar.DB9 - Use 9 strand straight thru cable6.9.5 Surge protection/IsolationJ13A/B/C/D and J14A/B/C/D (Port 20 through 27) are fully isolated from the systemlogic ground using opto-couplers and dc-dc converters.The remaining eight portsRJ45 PIN # Signal Type Signal Name1 RS-232 N/C2 RS-232 RXD3 RS-232 TXD4 RS-485 RS-485(+)5 RS-232/485 COM6 RS485 RS-485(-)7 RS-232/485 RTS8 RS-232/485 CTS9 RS-232/485 COM
