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COM2~4: Serial Port Connectors
This industrial motherboard features 3 serial
port connectors in RJ-45 jack. Users can use
these ports to connect to serial devices such as
network modem with RJ-45-to-COM type of
cable connectors.
Connector type: RJ-45 jack
1
COM2
Pin
COM2
1
*DSR# / RI# *DSR# / TX+
2
DCD#
3
DTR#
4
GND
5
RXD
6
TXD
7
CTS#
8
RTS
* -
About Selecting the Pin Signals
For details about selecting the pin signals, please refer to the J6, J2, J3, J4,
and J5 jumpers under the Jumper Setting section of this manual (P.9, P.10
and P.11).
Attention:
When changing the signals of Pin 1/2/7/8 for COM3 or COM4, remember to
change the operating mode (RS-422/485) first by using the jumpers JRS3~4
and JTM3 (please refer to the "JRS3~4" on P.9 and the "JTM3" on P.12 under
the Jumper Setting section).
8
1
8
1
8
COM3
COM4
COM3
*DSR# / TX+
*DCD# / TX-
DTR#
GND
RXD
TXD
*CTS# / RX+
*CTS# / RX+
*RTS# / RX-
COM4
*DCD# / TX-
DTR#
GND
RXD
TXD
*RTS# / RX-
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- 32 -
Installation
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