Manual

Functional Description CP-RIO3-05

Page 2 - 6 ID 1044-0711, Rev. 1.0

P R E L I M I N A R Y

2.1.4 COM Interfaces

The CP-RIO3-05 module provides two COM ports, COM1 and COM2, on the front panel for

connecting RS-232/RS-422 devices. The COM ports are realized as 9-pin D-Sub connectors,

J2a and J3a, and connected via flat cables to the 10-pin onboard connectors, J2 and J3.

COM1 is a full-featured RS-232 interface. COM2 is an RS-422 interface switchable to limited

RS-232 via the uEFI BIOS of the CP3002-RC/CP3002-RA.

COM1 corresponds to COMA on the CP3002-RA/-CP3002-RC. COM2 corresponds to COMB

on the CP3002-RA/-CP3002-RC.

The following figure and tables provide pinout information for the 9-pin D-Sub COM connectors

J2a and J3a located on the front panel.

Figure 2-4: D-Sub COM Connectors J2a (COM1) and J3a (COM2)

Table 2-4: D-Sub COM Connector J2a (COM1) Pinout

PIN SIGNAL DESCRIPTION I/O

1 DCD Data carrier detect I

2 RXD Receive data I

3 TXD Transmit data O

4 DTR Data terminal ready O

5 GND Signal ground --

6 DSR Data send request I

7 RTS Request to send O

8 CTS Clear to send I

9 RI Ring indicator I

J2a

COM1

J3a

COM2