3 serial pin assignments, 1 db9, 2 terminal block – Atop Technology SW550X User manual User Manual
Page 16: Serial pin assignments, Terminal block
Atop Industrial Wireless Serial Device Server Series
SW550X
User Manual V 1.1
10
2.3 Serial Pin Assignments
2.3.1
DB9
Pin#
RS-232
Full Duplex
RS-422/4-Wire RS-485
Half Duplex
2-Wire 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
2.3.2
Terminal Block
Pin#
RS-232
Full Duplex
RS-422/4-Wire RS-485
Half Duplex
2-Wire RS-485
Half Duplex
1
RxD
T+
NC
2
CTS
T-
NC
3
TxD
R+
DATA+
4
RTS
R-
DATA-
5
SG (Signal Ground)
SG (Signal Ground)
SG (Signal Ground)