Page B - 10
ID 34424, Rev. 3.0
CP-RIO3-04 Rear I/O
CP307
CUSTOMER SPECIFIC
P R E L I M I N A R Y
B.5.4
COM Interface
The CP-RIO3-04 Rear I/O module provides two identical COM ports for connecting RS-232 de-
vices to the CP-RIO3-04 Rear I/O module.
On the 8HP version, the onboard 10-pin COM connectors J2 and J3 are routed to the 9-pin D-
Sub COM connectors J2a and J3a located on the front panel.
On the 4HP version, the COM signals are available only on the onboard 10-pin COM
connectors J2 and J3 connectors.
The following figure and table provide pinout information for the 9-pin D-Sub COM connectors
J2a and J3a located on the front panel.
The following figure and table provide pinout information for the onboard COM connectors J2
and J3.
Figure B-7: COM Connectors
J2a (COM1) and J3a (COM2)
J3’
J2’
COM 1
COM 2
6
9
5
1
6
9
5
1
Table B-5: COM Connectors J2a (COM1) and
J3a (COM2) 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
Figure B-8: Serial Port Connectors
J2 (COM1) and J3 (COM2)
J2
COM 1
J3
COM 2
1
9
10
2
1
9
10
2
Table B-6: Serial Port Connectors
J2 (COM1) and J3 (COM2) Pinout
PIN
SIGNAL
DESCRIPTION
I/O
1
DCD
Data carrier detect
I
2
DSR
Data send request
I
3
RXD
Receive data
I
4
RTS
Request to send
O
5
TXD
Transmit data
O
6
CTS
Clear to send
I
7
DTR
Data terminal ready
O
8
RI
Ring indicator
I
9
GND
Signal ground
--
10
NC
Not connected
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