User guide

AFL-4 Series-N270 User Manual
Page 55
The COM3 TX Function Select jumper configures the TX pin on COM3 serial port
connector as RS-422 as an RS-485. The COM3 TX Function Select jumper selection
options are shown in
Table 4-5.
COM3 TX Function Select Description
Short 1 – 3 RS-422 Default
Short 2 – 4 RS-422 Default
Short 3 – 5 RS-485
Short 4 – 6 RS-485
Table 4-5: COM3 TX Function Select Jumper Settings
The COM3 TX Function Select jumper location is shown in Figure 4-8 below.
Figure 4-8: COM3 TX Function Select Jumper Pinout Locations
4.9.6 COM3 RS-232/422/485 Serial Port Select Jumper
Jumper Label: JP6
Jumper Type:
12-pin header (four 3-pin headers combined)
Jumper Settings:
See
Table 4-6