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9 Preparation for Wiring and Power Supply Wiring Procedures
9.4 Examples of External Wiring [AC Power Supply Type]
136
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
9.4.5 An external wiring example for the extension power supply unit (source input [+common])
This example shows a source input wiring (+common), including the extension power supply unit.
*1 Connect the AC power supply to the L and N terminals (in
any case of 100V AC system and 200V AC system).
Make sure that the power is turned ON at the same time in
the main unit and extension power supply units or earlier in
extension power supply units than the main unit.
As for the details, see "WIRING PRECAUTIONS" at "Safety
Precautions" field.
*2 Connect the 0V terminal of the main unit to the S/S terminal
of the input extension block.
*3 Some special function units/blocks, special adapters do not
have a power supply terminal.
When using an external power supply, turn it ON at the
same time with the main unit or earlier than the main unit.
Some special function blocks do not have the power
supply terminals.
When using an external power supply, turn it ON at the
same time with the extension power supply unit or earlier
than the extension power supply unit.
When turning OFF the power, confirm the safety of the
system, and then turn OFF the power of the PLC (including
special extension equipment) at the same time.
*4
AC power supply of
100 to 240V
S/S
L
N
0V
Special adapter
24-
24+
Class D
grounding
PL
Power supply ON
Emergency
stop
MC
MC
24V
Main unit
Input extension
block
S/S
24V DC
service
power
supply
output
*1
*3
*2
5V 0V 24V
5V 0V 24V
5V 0V 24V
Sink and source input type
MC MC
DC
power
supply
Power supply for loads to
be connected to PLC
output terminals
As for the details of emergency stop
operation, see "DESIGN PRECAUTIONS"
at "Safety Precautions" field.
DC AC
Breaker
24-
24+
*3
Special function
block
5V 0V 24V
L
N
S/S
24-
24+
*4
*1
*2
Extension power supply unit
5V 0V 24V
5V 0V 24V
Input extension
block
Special function
block
5V 0V 24V
5V 0V 24V
Output extension
block
Sink and
source
input
type
Sink and
source
input
type
Wiring precaution:
Grounding and power cables should be positioned
to exit the unit from above as shown in the figure.
Grounding and
power cables
*5
*5
*5
The "24V" and "0V" terminals are located on the output
terminal side.
For details on the terminal layout, refer to Section 4.7.
When turning OFF the power, confirm the safety of the
system, and then turn OFF the power of the PLC
(including special extension equipment) at the same time.