Atop-technology MB5416A2 User manual Manual de usuario Pagina 59

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Atop Modbus Gateway
MB54XX-X Series
User’s Manual V 1.1
56
DB9 to RS-232/RS-485/RS-422 connectors (MB5404D-X)
Table 5. 3
Pin#
RS-232
Full Duplex
RS-422/4-Wire RS-485
Full 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
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