3-4
3-2  System Configurations
1: 1 / 1: N connection
3-2-3 Connecting independently to RS-232C and RS-485 ports
This configuration connects to external devices using the RS-232C port and RS-485 port.  In this case, communication
through these ports is performed independently.
RS-485 port
Signal conversion
RS-485
RS-232C
<Mode selection switch: “0”>
RS-232C port
None
General purpose device
General purpose device
External device
External device
External device External device
ABC
Note:  External devices A , B  and C must be the same in type as well 
           as communication protocol.  For example, this connection is not 
           available when A and B are temperature controllers and C is a 
           bar code reader.
CPU
Power 
supply
RS1