VB7009 User Manual
22
2.2.9.
COM Pin Headers
There are COM pin headers on the mainboard in addition to the COM port 1 on the external I/O. Each
COM pin header supports the RS-232 standard. The COM pin headers labeled as “COM2, COM3 and
COM4” are available in VB7009-16 and VB7009-10E SKUs, while the additional “COM5” and “COM6” pin
headers are offered only by VB7009-12XC and VB7009-12QCE SKUs. All the COM pin headers can
s5V or +12V. See page 34 for details on setting the voltage. The pinout of the COM pin headers
are shown below.
Figure 21: COM pin header diagram
Pin
Signal
Pin
Signal
1
COM_DCD
2
COM_RXD
3
COM_TXD
4
COM_DTR
5
GND
6
COM_DSR
7
COM_RTS
8
COM_CTS
9
COM_RI
10 Key
Table 17: COM pin header pinout
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