IEI Integration IBX-530B-N270 - Manual (Page 38)

IBX-530B-270 Embedded System
Page 26
3.5.7 COM3 TX Function Select Jumper
Jumper Label: JP11
Jumper Type: 6-pin header
Jumper Settings: See Table 3-10
Jumper Location: See Figure 3-7
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 3-10.
COM3 TX Function Select Description
Short 1 – 3 RS-422 TX- Default
Short 2 – 4 RS-422 TX+ Default
Short 3 – 5 RS-485 D-
Short 4 – 6 RS-485 D+
Table 3-10: COM3 TX Function Select Jumper Settings
The COM3 TX Function Select jumper location is shown in Figure 3-7 below.
Figure 3-7: COM3 TX Function Select Jumper Pinout Locations