ePAQ-9410 / ePAQ-
9420 User’s Guide UG-1071
Copyright © 2017 QEI
Communications Ports
25
6.9.3
RS-232/RS-485 Connections
(DB9 - eXP9425 only):
Designations:
RS232/RS485
Connector Type:
DB9
Port Speed:
1200 to 115.2 kbps
6.9.4 Recommended cable type :
RJ45 - Use CAT 5e cable or similar.
DB9 - Use 9 strand straight thru cable
6.9.5 Surge protection/Isolation
J13A/B/C/D and J14A/B/C/D (Port 20 through 27) are fully isolated from the system
logic ground using opto-couplers and dc-dc converters.The remaining eight ports
RJ45 PIN #
Signal Type
Signal Name
1
RS-232
N/C
2
RS-232
RXD
3
RS-232
TXD
4
RS-485
RS-485(+)
5
RS-232/485
COM
6
RS485
RS-485(-)
7
RS-232/485
RTS
8
RS-232/485
CTS
9
RS-232/485
COM
