40
CMA34CR cpuModule
BDM-610000083
Rev L
RS-422 Mode Pinout
Table 21 provides the serial port connector pinout
when RS-422 mode is enabled.
Facing the serial port connector, the pinout is:
Table 21
Serial Port in RS-422 Mode
Pin
Signal
Function
In/Out
DB-9
1
TXD–
Transmit Data (–)
out
1
2
—
Reserved
—
6
3
TXD+
Transmit Data (+)
out
2
4
—
Reserved
—
7
5
RXD+
Receive Data (+)
in
3
6
—
Reserved
—
8
7
RXD–
Receive Data (–)
in
4
8
—
Reseved
—
9
9,10
GND
Signal Ground
out
5
9
7
5
3
1
GND
RXD-
RXD+
TXD+
TXD-
GND
Rsvd
Rsvd
Rsvd
Rsvd
10
8
6
4
2
WARNING
The pinout of the COM ports in RS-422 mode is
not
compatible with previous generations
of RTD cpuModules.
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