User Manual

AFL2-W15A-N270 Panel PC
Page 27
Short 4 – 6 RS-485 D+
Table 2-9: COM3 TX Function Select Jumper Settings
The COM3 TX Function Select jumper location is shown in Figure 2-16 below.
Figure 2-16: COM3 TX Function Select Jumper Location
2.7.8.1 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 2-10: RS-422 Pinouts
COM 3 RS-485 Description
Pin 1 Data-
Pin 2 Data+
Table 2-11: RS-485 Pinouts