Omron CJ - 08-2008 - Connecting to the RS-232 C Port on the CPU Unit

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Appendix F
Connecting to the RS-232C Port
on the CPU Unit
Connection Examples
The wiring diagrams for connecting to the RS-232C port are provided in this appendix. In actual wiring, we rec-
ommend the use of shielded twisted-pair cables and other methods to improve noise resistance. Refer to
Rec-
ommended Wiring Methods
later in this appendix for recommended wiring methods.
Connections to Host Computers
Note Connections to a computer running the CX-Programmer are the same as those shown here.
1:1 Connections via RS-232C Port
Note The maximum cable length for an RS-232C connection is 15 m. RS-232C communications specifica-
tions, however, do not cover transmissions at 19.2 Kbps. Refer to documentation of the device being
connected when using this baud rate.
IBM PC/AT or Compatible Computer
RS-232C
RS-232C
port
CPU Unit
Computer
RS-232C
interface
Signal
name
Signal
name
RS-232C
interface
D-sub, 9-pin
connector (male)
D-sub, 9-pin
connector (male)
Pin
No.
Pin
No.