JHCTech KMDA-3610, User Manual

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User’s Manual
24
1 12~24V 2 NC
3 GND
2.3.8 COM1/2 Connector
The KMDA-3921/3920/3610 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 2.10 for pin assignments.
Figure 2. 18
Table 2.10: 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
2.3.9 COM3/4 Connector
Figure 2. 19
COM3/4 are only for RS232. The Pin assignments are as follows:
Table 2.11: COM3/4 Serial Port Pin Assignments
Pin Signal Pin Signal
1 DCD 2 RxD
3 TxD 4 DTR