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Ethernet Port (RJ-45) Pinouts
Pin Signal
Direction Description
1
TX+
—>
2
TX–
—>
3
RX+
<—
6
RX–
<—
Enet
Auxiliary Port (DB-25) Pinouts
Pin Signal
1
GND
Transmit data +
2
TXD
Transmit data –
3
RXD
Receive data +
4
RTS
Receive data –
5
CTS
6
DSR
7
Signal
ground
8
CD
20
DTR
22
RI
Direction Description
—
Shield ground
—>
Transmit data
<—
Receive data
—>
Request to send (used for
hardware flow control)
<—
Clear to send (used for
hardware flow control)
<—
Data set ready
—
Signal ground
<—
Carrier detect (used for modem
control)
—>
Data terminal ready (used for
modem control only)
<—
Ring indicator
Console Port (DB-25) Pinouts
Pin
Signal Direction
Description
1
GND
—
Ground
2
TXD
<—
Transmit data
3
RXD
—>
Receive data
4
RTS
<—
Ready to send
5
CTS
—>
Clear to send
6
DSR
—>
Data set ready
(always on)
7
GND
—
Ground
8
DCD
—>
Data carrier detect
(always on)
20
DTR
<—
Data terminal ready
Shield
GND
—
Shield ground
1.
Pins 4 and 5 are connected
2.
Pins 6 and 8 are connected
1
1
2
2