iEi Integration Corp. POC-17i, User Manual

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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.