2.8 Extending the Range of Digital Inputs/Outputs
For the MELSEC FX family of PLCs several ways and means are available to provide a base unit
with additional inputs and outputs.
2.8.1 Extension Boards
쎲
: The extension board can be used with a base unit of this series.
쑗
: The extension board cannot be used with this series.
2.8.2 Compact Extension Units
Compact Extension Units of the FX0N Series
쎲
: The extension unit can be used with a base unit of this series.
쑗
: The extension unit cannot be used with this series.
The Hardware Extending the Range of Digital Inputs/Outputs
Training Manual GX IEC Developer 2 - 17
FX1N-2EYT-BD
• BY0+
BY0-
BY1+
BY1-
For a small number of I/O (2 to 4) an exten
-
sion adapter board can be installed directly in
aFX
1S or FX1N base unit. Extension boards
therefore do not require any additional instal
-
lation space.
The state of the additional input and outputs
is reflected in special relays in the PLC (see
section A.1.5). In the program these relays
are used instead of X and Y devices.
FX1N-2EYT-BD
with two digital
outputs
Connector side
Designation
Number of I/O
Output
type
Power
supply
FX1S FX1N
FX2N
FX2NC
FX3G
FX3U
FX3UC
Total
No. of
inputs
No. of
outputs
FX
1N-4EX-BD 4 4 — —
From base
unit
쎲쎲쑗쑗쑗
FX
1N-2EYT-BD 2 — 2 Transistor
The powered compact input/output extension
units have their own power supply. The inte-
grated service power supply (24 V DC) of AC
powered extension units can be used for the
supply of external devices.
It is possible to choose between relay and
transistor (source) output type.
Designation
Number of I/O
Output
type
Power
supply
FX1S FX1N
FX2N
FX2NC
FX3G
FX3U
FX3UC
Total
No. of
inputs
No. of
outputs
FX
0N-40ER/ES-UL 40 24 16 Relay
100–240 V
AC
쑗쎲쑗쑗쑗
FX
0N-40ER/DS 40 24 16 Relay
24 V DC
FX
0N-40ET/DSS 40 24 16 Transistor
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