User manual Version 1.2
ABLELink
Serial-Ethernet Server
GW21W-MAXI
Copyright © 2003 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
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Pin assignments of Mini DIN connector is shown in the following table:
Pin#
RS-232
Full Duplex
RS-485
2 wire, Half Duplex
RS-485
4 wire, Full Duplex
1
DCD
N/A
N/A
2
RXD
N/A
RxD/T+
3
TXD
TxD/R+
TxD/R+
4
DTR
N/A
(reserved)
N/A
5
SG (Signal Ground)
SG (Signal Ground)
SG (Signal Ground)
6
DSR
N/A
N/A
7
RTS
RTS/R-
RTS/R-
8
CTS
N/A
CTS/T-
9
N/A
N/A(reserved for Atop
devices)
N/A
Atop provides Mini DIN connector to DB9 connector cable, the pin assignments of DB9 connector is
shown in the following table:
Pin#
RS-232
Full Duplex
RS-485
2 wire, Half Duplex
RS-485
4 wire, Full Duplex
1
DCD
N/A
N/A
2
RXD
N/A
N/A
3
TXD
DATA-
RXD-
4
DTR
N/A
(reserved)
TXD-
5
SG (Signal Ground)
SG (Signal Ground)
SG (Signal Ground)
6
DSR
N/A
N/A
7
RTS
N/A
N/A
8
CTS
DATA+
RXD
+
9
RI
N/A(reserved for Atop
devices)
TXD+
Note that RS-485 2 or 4 pins assignments of DB9 connector is different from those of Mini DIN connector.
