TOPSCCC EX-9686U-L series, Hardware User Manual

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EX-9686U-L Series Hardware User Manual
Page
14
3.3 UART Connectors & Debug Port
There are 3 UART ports on this device. The connector type and functions are described in
the table below:
UART
Number
Connector
Type
Available
Signals
Notes
UART 1
2x4 box
header RS232 signal level
(TX, RX, RTS, CTS) Console/Debug port
UART 2
2x4 box
header RS232 signal level
(TX, RX, RTS, CTS) RS232 port
UART 3
2x4 box
header
RS485 signal level
(485+, 485-) RS485 port
Note: RS485 port works only in
HALF Duplex mode
One 2x4 box header to DB9 cable is included. See
Appendix A
for the detailed info on the
cable pin assignment.
2x4 Box Header:
DB9
Pin
2x4
header
RS232 RS485
1 -- --- ---
2 4 RxD
485+
3 6 TxD 485-
4 1 --- ---
5 5 GND
GND
6 7 --- ---
7 8 RTS ---
8 2 CTS ---
9 -- --- ---
1
2
7
8