Table of Contents
Advertisement
1
3
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: COM1/2 Serial Ports Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
2.3.9 COM3/4 Connector
COM3/4 are only for RS232. The Pin assignments are as follows:
12~24V
GND
RS-232 Signal
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
Table 2.11: COM3/4 Serial Port Pin Assignments
Pin
Signal
1
DCD
3
TxD
2
NC
Table 2.10 for pin assignments.
Figure 2. 18
RS-422 Signal
RS-485 Signal
TX-
DATA-
TX+
DATA+
RX+
NC
RX-
NC
GND
GND
NC
NC
NC
NC
NC
NC
NC
NC
Figure 2. 19
Pin
Signal
2
RxD
4
DTR
24
User's Manual
Advertisement
Table of Contents
