Com1/2 Connector - JHCTech KMDA-3820 User Manual

Table 2.8:DC-IN port pin assignments
Pin
1
3

2.4.8 COM1/2 Connector

The KMDA-3820 provides 2 serial ports of COM1/2 by 2*D-sub 9-pin connectors. COM1/2
configured as RS232、RS422 or RS485 by BIOS setup.
Table 2.9: COM1/2 Serial Ports Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
Figure 2. 15
Signal Pin
12~24V 2
GND
Figure 2. 16
RS-232 Signal RS-422 Signal
DCD TX-
RxD TX+
TxD RX+
DTR RX-
GND GND
DSR NC
RTS NC
CTS NC
RI NC
19
Signal
NC
Table 2.9 for pin assignments.
RS-485 Signal
DATA-
DATA+
NC
NC
GND
NC
NC
NC
NC
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