JHCTech KMDA-3201, User Manual

Page: 26 / 76

User’s Manual
19
2.4.7 COM1/2 Connector
The KMDA-3201 provides 2 serial ports of COM1/2 by 2*D-sub 9-pin connectors. COM1/2 can be
configured as RS232 、 RS422 or RS485 by BIOS setup. Table 2.9 for pin assignments.
Figure 2.18 COM1/2 Connector
Table 2.9: COM1/2 Serial Ports Pin Assignments
Pin RS-232 Signal RS-422 Signal RS-485 Signal
1 DCD TX- DATA-
2 RxD TX+ DATA+
3 TxD RX+ NC
4 DTR RX- NC
5 GND GND GND
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 RI NC NC
2.4.8 COM3/4/5/6 Connector
Figure 2.19 COM3/4/5/6 Connector
COM3/4/5/6 are only for RS232. The Pin assignments are as follows:
Table 2.10: COM3/4/5/6 Serial Port Pin Assignments
Pin Signal Pin Signal
1 DCD 2 RxD
3 TxD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
(NOTE: KMDA-3201-T00X has no COM5/6 interface)