User`s manual

16
FX3U Series Programmable Controllers
User’s Manual - MODBUS Serial Communication Edition
3 System Configuration
3.1 System Configuration
3. System Configuration
This section explains the configuration of communication equipment operating in accordance with RS-485
and RS-232C and the selection of equipment required by FX
3U PLCs.
3.1 System Configuration
This section outlines the system configuration required to use MODBUS serial communication.
Attach the special adapter
connection board to the main unit,
and then attach the communication
adapter on the left side of the main
unit.
RS-485: 500 m
(1640' 5")
RS-232C: 15 m
(49' 2")
1
++
Communication equipment operating
in accordance with MODBUS RS-485
or RS-232C
FX 3U PLC Important point in selection
Total extension
distance
Communication
adapter
Special adapter
connection board
For combinations of communication equipment for each FX 3U Series, refer to the next page.
1
indicates the combination of communication equipment pattern type.