3.5"-SBC-VR1000 - User Guide, Rev. 1.7
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7.9.
Serial COM1, COM2, COM3 & COM4 Ports (CN12, CN17, CN21 & CN22)
The 10-pin 1.25 mm pitch serial COM wafer CN12 and CN17 provide RS232/422/485 connections.
The 10-pin 1.25 mm pitch serial COM wafer CN21 and CN22 provide RS232 connections.
Figure 22: Serial COM CN12, CN17, CN21, CN22
Table 28: Pin Assignment CN12, CN17
Pin
RS232 Signal
RS422 Signal
Half Duplex RS485
Signal
Full Duplex RS485
Signal
Note
1
DCD
TX-
DATA-
TX-
2
DSR
N/A
N/A
N/A
3
RXD
TX+
DATA+
TX+
4
RTS
N/A
N/A
N/A
5
TXD
RX+
N/A
RX+
6
CTS
N/A
N/A
N/A
7
DTR
RX-
N/A
RX-
8
RI
N/A
N/A
N/A
9
GND
GND
GND
GND
10
+5V
+5V
+5V
+5V
500 mA max.
Connector Type
B2W, 1x10-pin, 1.25 mm pitch
Mating Connector
Vendor
PINREX
Housing Model No.
712-75-10W001
Terminal Model No.
712-70-T00001
Table 29: Pin Assignment CN21, CN22
Pin
RS232 Signal
Note
1
DCD
2
DSR
3
RXD
4
RTS
5
TXD
6
CTS