IEI Technology AFL-W10A-N270, User Manual

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AFL-W10A-N270 User Manual
Page 36
2.5.4.1 COM3 RS-422 and RS-485 Pinouts
The pinouts for RS-422 and RS-485 operation of external serial port COM 3 are detailed
below.
COM 3 RS-422 Description
Pin 1 TX-
Pin 2 TX+
Pin 6 RX-
Pin 7 RX+
Table 2-6: RS-422 Pinouts
COM 3 RS-485 Description
Pin 1 Data-
Pin 2 Data+
Table 2-7: RS-485 Pinouts
2.5.5 COM3 RX Function Select Jumper
Jumper Label: JP9
Jumper Type:
8-pin header
Jumper Settings:
See
Table 2-8
Jumper Location:
See
Figure 2-7
The COM3 RX Function Select jumper sets the communication protocol used by the
COM3 port as RS-232, RS-422 or RS-485. The settings are shown in
Table 2-8
.
COM3 RX Function Select Description
Short 3-4 RS-232 Default
Short 1-2, 5-6 RS-422
Short 1-2, 7-8 RS-485
Table 2-8: COM3 RX Function Select Jumper Settings
The COM3 RX Function Select jumper location is shown in
Figure 2-7
.