Rs-422 dte to dte cables, Pinouts for db25 connectors – Comtrol Building Custom Cables User Manual
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Pinouts for DB25 Connectors
Building Custom Cables
RS-422 DTE
to
DTE
Cables
Most RS-422 communication links usually do not use hardware
handshaking or signal ground lines. The following figure shows
twisted-pair transmission lines that work in most cases.
Pinouts for DB25 Connectors
Use the following table and figure for pinout information for all
interface boxes and DB25 connectors on the Quadcable and Octacable.
Note: The Quadcable, Octacable, and the RJ45 Rack Mount do not
support RS-422 mode.
Table 1.
DB25
Connector Pinouts
Pin
RS-232
Signal
RS-422
Signal
1
Not used
Not used
2
T
x
D
Not used*
3
R
x
D
Not used*
4
RTS
Not used*
5
CTS
Not used*
6
DSR
Not used*
7
Signal ground
Signal ground*
8
DCD
Not used*
9 through 14
Not used
Not used
15
Not used
R
x
D
+
16
Not used
Not used
17
Not used
R
x
D
-
18
Not used
Not used
19
Not used
T
x
D
+
RocketPort Connector
TxD+
RxD+
Name
DB25
19
15
Signal
RxD+
TxD+
Name
Pins
Remote Connector
TxD-
25
RxD-
17
Signal
RxD-
TxD-
GND 7 GND