User`s manual

BDM-610000082 Rev A Chapter 3: Connecting the cpuModule 37
RS-422 Mode Pinout
Table 16 provides the serial port connector pinout when RS-422 mode is enabled.
Facing the serial port connector, the pinout is:
Table 16 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
5RXD+Receive Data (+) in3
6—Reserved —8
7RXD–Receive Data (–)in4
8—Reseved —9
9,10 GND Signal Ground out 5
97531
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.