3 serial pin assignments, 1 db9, Serial pin assignments – Atop Technology SW550XC User manual User Manual
Page 15
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Industrial Wireless Serial Device Server Series
SW550xC User Manual V 1.0
10
3.3
Serial Pin Assignments
3.3.1
DB9
Table 3.4
Pin#
RS-232
Full Duplex
4-W RS-422/RS-485
Half Duplex
2-W RS-485
Half Duplex
1
DCD
N/A
N/A
2
RXD
TXD+
N/A (reserved)
3
TXD
RXD+
DATA+
4
DTR
N/A
N/A
5
SG (Signal Ground)
SG (Signal Ground)
SG (Signal Ground)
6
DSR
N/A
N/A
7
RTS
RXD-
DATA-
8
CTS
TXD-
N/A (reserved)
9
RI
N/A
N/A
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