
The modular design of the FX0N/FX2N
series makes it extremely flexible, ena-
bling it to be used for a very broad range
of applications.
You can configure tailor-made systems
by combining modules from a variety of
different categories (see figure).
All modules are electrically isolated from
their environment with optocouplers for
maximum reliability.
DIGITAL
INPUTS/OUTPUTS
ANALOG
INPUTS/
OUTPUTS
POSITIONING
MODULES
COMMUNI-
CATIONS
MODULES
CPU
Analog I/O modules
For processing current/voltage
signals and temperature
registration with a direct
connection option for Pt100
resistance thermometers and
thermocouples.
Digital I/O modules
For a variety of signal levels
with relayortransistor
switches.
Positioning modules
High-speed counter modules with support
for the connection of incremental rotary
transducers and positioning modules for
servo and stepping motor drives.
Communications modules
Interface modules with
RS-232/RS-422/RS-485 interfaces
for the connection of peripherals
and PLC–PLC links. Network
modules for Profibus, GSM and for
the configuration of proprietary
Mitsubishi networks
Digital and special function modu-
les – configuration
The options for using digital and special
function modules are dictated by CPU
used in the system.
When calculating the number of special
function modules you can use in a system
you must take both the number of digital
modules and the maximum number of
special function modules that can be used
into account.
The table on the right provides a simpli-
fied guide to the number of modules you
can use in each system type. More de-
tailed information and the basic principles
of system configuration can be found on
page 21 ff.
MELSEC FX
The FX Family
SYSTEM DESCRIPTION
CPU type
System restrictions
FX0S
Stand-alone PLC with 10 / 14 / 20 or 30 I/Os;
no special function modules
FX0N
PLC with max.128 I/Os;
max.2 special function modules supported
FX2N
PLC with max.256 I/Os;
max.8 special function modules
BASICS
X
FX
F
Features
MITSUBISHI ELECTRIC
5