IBT Technologies CI7BM, User Manual

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Chapter 2 Installations
28 CI7BM User’s Manual
J8: COM1 Serial Port
J8, a 10-pin header connector, is an onboard serial port of the CI7BM.
The following table shows the pin assignments of this connector.
Pin # Signal Name
1 DCD, Data carrier detect
2 RXD, Receive data
3 TXD, Transmit data
4 DTR, Data terminal ready
5 GND, ground
6 DSR, Data set ready
7 RTS, Request to send
8 CTS, Clear to send
.
J8: COM1
9 RI, Ring indicator
10 NC
J9: COM2 Serial Port
J9, a 10-pin header connector, is the onboard COM2 serial port of the
CI7BM. The following table shows its pin assignments.
Pin # Signal Name
RS-232 R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR
RX- NC
5 GND GND GND
6 DSR RTS-
NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
.
J9: COM2
10 NC NC NC