Specifications

12
2. Replacement of FX2N series
(2) Expansion equipment recommended replacement models
When changing from FX
2N to FX3U series main units, the following expansion equipment and option
equipment must be replaced at the same time.
If replacement models with the same performance are not available, please review and consider to re-
design the system following the comments included in the "Special remarks" column.

Expansion and option equipment required to be replaced when FX2N series main units are changed to FX3U series.
Models connectable to FX2N series
Recommended
replacement
models
connectable to
FX3U
Special remarks
Description Model name Model name
Special adapter
(for RS-232C communication)
FX
2NC-232ADP
FX3U-232ADP
(-MB)
Interface board or expansion
board is needed for
connection of recommended
replacement model.
Special adapter
(for RS-485 communication)
FX
2NC-485ADP
FX3U-485ADP
(-MB)
Interface board
(for special adapter connection)
FX
2N-CNV-BD FX3U-CNV-BD
Expansion board
(analog VR)
FX
2N-8AV-BD FX3U-8AV-BD
Expansion board
(RS-232C communication)
FX
2N-232-BD FX3U-232-BD
Expansion board
(RS-485 communication)
FX
2N-485-BD FX3U-485-BD
The FX2N model Ver. 2.0
and later can use full duplex
communication, the FX3U
model can only use half
duplex.
Expansion board
(RS-422 communication)
FX
2N-422-BD FX3U-422-BD
Memory cassette FX-RAM-8 FX
3U-FLROM-16
Memory cassette FX-EEPROM-4 FX
3U-FLROM-16
Memory cassette FX-EEPROM-8 FX
3U-FLROM-16
Memory cassette FX-EEPROM-16 FX
3U-FLROM-16
Memory cassette FX-EPROM-8 FX
3U-FLROM-16
Function extension memory
cassette
FX
2N-ROM-E1 FX3U-FLROM-16
The FX3U series
recommended replacement
model only has memory
functions.
Inverter communication
function is built into the
FX3U main unit.
Special function block
(ASI master)
FX
2N-32ASI-M
No replacement
model
Create a new system using
CC-Link etc.
Special function block
(I/O link master)
FX
2N-16LNK-M
No replacement
model
Create a new system using
CC-Link/LT etc.
Conversion cable
(FX
1, FX2 extension connection)
FX2N-CNV-IF
No replacement
model
FX1, FX2 expansion
equipment cannot be
connected. Create a new
system made up of FX3U
series components.
Dummy input switch FX
2N-SW
No replacement
model