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2 SYSTEM CONFIGURATION
MELSEC-QnA
(b) Countermeasure for mis-input
Wire the power supply cable for the power supply module, stabilized power,
and input/external-supply power of the AC input from the same power
source.
For DC input
24VDC
Remote I/O module
Power supply module
Master module
Input
external-supply
power
Stabilized
power supply
Module power supply
Programmable
controller CPU
For AC input
Input
external-supply
power
Module power supply
24VDC
Power supply module
Master module
Programmable
controller CPU
Remote I/O module
Stabilized
power supply
REMARK
When supplying power from one power source to multiple remote I/O modules, select the cable
and perform the wiring with considerations to the voltage decline from the cables.
Connections can be established if the remote I/O module's receiving port voltage is within the
specification range of the used remote I/O module.
Stabilized
power supply
Remote module
Remote module