CP-RIO3-04 Rear I/O CP3003-SA
Page C - 8 ID 1052-6929, Rev. 3.0
D R A F T — F O R I N T E R N A L U S E O N L Y
C.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 8 HP 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 4 HP version, the COM signals are available only on the onboard 10-pin COM
connectors J2 and J3.
The following figure and table provide pinout information for the 9-pin D-Sub COM connectors
J2a and J3a located on the front panel of the 8 HP version.
The following figure and table provide pinout information for the onboard serial port connectors
J2 and J3.
Figure C-7: COM Connectors J2a (COMA)
and J3a (COMB)
Table C-5: COM Connectors J2a (COMA)
and J3a (COMB) Pinout
PIN SIGNAL DESCRIPTION I/O
1 DCD Data carrier detect I
2RXDReceive 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