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CP-RIO3-04S Functional Description

ID 1036-1669, Rev. 1.0 Page 2 - 5

2.1.3 COM Interfaces

The CP-RIO3-04S provides two COM ports, COM1 and COM2, for connecting RS-232

devices. COM1 is available on the front panel and is implemented as an RJ-45 connector, J2.

COM2 is available onboard and is implemented as a 10-pin connector, J3.

The following figure illustrates the RJ-45, serial port connector, J2 (COM1).

Figure 2-3: Serial Port Connector J2 (COM1)

The following table indicates the pinout of the RJ-45, serial port connector, J2 (COM1).

Table 2-3: Serial Port Connector J2 (COM1) Pinout

PIN SIGNAL DESCRIPTION I/O

1 RTS Request to send O

2 DTR Data terminal ready O

3 TXD Transmit data O

4 GND Signal ground --

5 GND Signal ground --

6 RXD Receive data I

7 DSR Data set ready I

8 CTS Clear to send I

COM 1

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 37 38

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