3-6
3-2 System Configurations
1: 1 / 1: N connection
<2) Communication between external device A and the CPU module>
RS-485
RS-232C
External device
External device A
(personal computer, etc.)
External device External device
B
C
D
Note: A user program for
controlling external
device A is necessary.
(Note)
CPU
Power
supply
RS1
<3) Communication between external device B, C or D and the CPU module>
RS-485
RS-232C
External device
External device A
(personal computer, etc.)
External device External device
BCD
Note: When the station number designated in the
send data is the same as the setting of the
RS-485 station number setting switch of RS1,
FB in the CPU module receives the data.
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
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