12: Connections and Pinouts
This section shows the connections to the DB9 connector for RS232/422/485.
Figure A-1 Single Serial Port and Ethernet Port on NetDirect
Serial Port Pinouts
The NetDirect has a female DB9 DCE or male DB9 DTE serial port that supports one of three
pinouts depending on the model of your NetDirect unit:
Figure A-2 DB9Male/Female in RS232 Mode (All Models)
1
6
5
9
GND
DTR
(in) (in)
TX RX
(out) (NC)
5-15
VDC
(in)
CTS RTS DSR
(out) (in) (out)
DB9 Female RS232
5
9
GND
DTR
(out)
(out)
TX
RX
(in)
5-15
VDC
(in)
CTS
RTS
DSR
(in)
(out)
(in)
DB9 Male RS232
1
6
(NC)
Figure A-3 DB9Male/Female in RS422/485 (4-Wire) Mode (NetDirect485 & PoE Models)
1
6
5
9
GND
TX-
RX+
5-15
VDC
(in)
TX+ RX-
DB9 Female RS422/485 4-wire
5
9
GND
TX- RX+
5-15
VDC
(in)
TX+
RX-
DB9 Male RS422/485 4-wire
1
6
Summary of Contents for NetDirect
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