Examples Of External Wiring [Dc Power Supply/Dc Input Type]; Example Of Sink Input [-Common] Wiring - Mitsubishi FX3U-?*MR/ES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
9.6

Examples of External Wiring [DC Power Supply/DC Input Type]

9.6.1

Example of sink input [-common] wiring

An example of sink input [-common] wiring is given below. When connecting input/output powered extension
units/blocks, carefully check the signal names on the terminal block because the sink and source input type
units/blocks and the sink input type units/blocks vary in signal names on the terminal block.
Sink and source input type
5V 0V 24V
Sink and
5V 0V 24V
source
input
type
5V 0V 24V
5V 0V 24V
Input/output powered extension unit
Sink and
5V 0V 24V
source
input
type
5V 0V 24V
5V 0V 24V
5V 0V 24V
*1 Connect DC power to [+] and [-] terminals. The same power source for the
main unit, extension units, special function unit/blocks and special adapters
is preferable. When using the different power source from the main unit,
turn ON the peripheral devices' power simultaneously, or earlier than the
main unit's. 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.
*2 Do not connect with [0V] and [24V] terminals.
*1
Special
24+
adapter
24-
*1
Main unit
S/S
(0V)
*2
(24V)
*3, 4
Input extension
S/S
block
*1, 5
Special function
24+
block
24-
*1
S/S
0V
*2
24V
*3, 4
Input extension
S/S
block
*1, 5
Special function
24+
block
24-
Output extension
block
9 Preparation for Wiring and Power Supply Wiring Procedures
9.6 Examples of External Wiring [DC Power Supply/DC Input Type]
Class D
grounding
(A) (B)
Sink input type
COM
24+
*3 24V DC [+] supplies power to the [S/S]
terminal at the input extension block.
*4 In case of the sink input type, the [S/S]
terminal is used as the [24+] terminal.
*5 Some special function units/blocks do not
have a power supply terminal.
*6 Do not connect with [24+] and [ · ] terminals.
24V DC
Circuit Protector
Power supply ON
PL
MC
MC
Emergency
stop
MC MC
Power supply for loads to
be connected to PLC
output terminals
As for details on emergency
stop operation, see "DESIGN
PRECAUTIONS" at "Safety
Precautions" field.
(A) (B)
*6
1
2
3
4
5
6
7
8
9
10
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