This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
• The number of connectable expansion boards varies depending on the main unit
Main units : 1 unit
Main units : 2 units
Never stack up two or more expansion boards.
For details on the system configuration, refer to the following manual.
→ Refer to the FX Series User's Manual - Data Communication Edition
3.2 General Specifications
The general specifications are equivalent to the PLC main unit. For general
specifications, refer to the following manuals.
However, since the product is not isolated between communication lines and the
CPU of main unit, please do not perform any dielectric withstand voltage tests or
nsulation resistance tests to this product.
→ Refer to the FX3G Series User's Manual - Hardware Edition
3.3 Communication specifications
Model name Applicability
FX3G Series PLC Ver.1.00 or later (from first production)
standard In conformance to RS-232C
15m (49ft) maximum
Connection method 9-pin D-Sub type (male)
Indication (LED) RD, SD
Non-Protocol Communication, Computer Link (dedicated
protocol format 1 and 4), and Programming
Non-Protocol Communication, Computer Link
Insulation Not insulated (Between communication line and CPU)