TPC-2230 User Manual
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© National Instruments
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19
COM2 Connector Pinout
The TPC-2230 COM2 serial port is adjustable. You can set it to RS-232, RS-422, or RS-485,
and it has auto data flow control capability. In other words, the TPC-2230 can automatically
detect the data flow direction at this port when two-wired RS485 communication is activated.
The following figure and table show the COM2 pinout and settings.
PIN
RS-232
RS-422
RS-485
1
DCD
TX-
D-
2
RX
TX+
D+
3
TX
RX+
—
4
DTR
RX-
—
5
GND
GND
GND
6
DSR
—
—
7
RTS
—
—
8
CTS
—
—
9
RI
—
—
1
5
9
6