Instruction Manual

IBX-530B-270 Embedded System
Page 23
3.5.5 COM Port Pin 9 Select
Jumper Label:
JP8 and JP10
Jumper Settings:
See
Table 3-5
Jumper Location:
See
Figure 3-5
Two jumpers (JP8 and JP10) configure pin 9 on COM1 and COM3 DB-9 connectors. Pin 9
on the COM1 and the COM3 DB-9 connectors can be set as the ring (RI) signal, +5 V or
+12 V. The COM1 and COM3 Pin 9 Setting jumper selection options are shown in
Table
3-5.
JP8 Description
Short 1-3 COM1 RI Pin use +12 V
Short 5-7 COM1 RI Pin use +5 V
Short 7-9 COM1 RI Pin use RI Default
Table 3-5: COM1 Pin 9 Setting Jumper Settings
JP10 Description
Short 1-2 COM3 RI Pin use +12 V
Short 3-4 COM3 RI Pin use RI Default
Short 5-6 COM3 RI Pin use +5 V
Table 3-6: COM3 Pin 9 Setting Jumper Settings
The COM1 and COM3 Pin 9 Setting jumper locations are shown in Figure 3-5 below.