IEI Integration POC-17i_19i-Series_IEI - Manual (Page 36)

POC-17i/19i Series
Page 24
Figure 3-5: JP8 Jumper Setting Location
3.6.5 COM3 TX Function Select Jumper
Jumper Label: JP9
Jumper Type: 6-pin header
Jumper Settings: See Table 3-6
Jumper Location: See Figure 3-6
The COM3 TX Function Select jumper configures the TX pin on COM3 serial port
connector as RS-422 or RS-485. The COM3 TX Function Select jumper selection
options are shown in Table 3-6.
JP9 Description
Short 1 – 3 RS-422 TX-
Short 2 – 4 RS-422 TX+
Short 3 – 5 RS-485 D-
Short 4 – 6 RS-485 D+
Table 3-6: COM3 TX Function Select Jumper Settings
The COM3 TX Function Select jumper location is shown in Figure 3-6 below.