262
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
9 CC-Link/LT Built-in master ability (Only FX3UC-32MT-LT)
9.6 Selection of the power supply for CC-Link/LT
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
9.6.2 Installation concept of power adapter or dedicated power supply
1. Built-in power supply
The following conditions should be satisfied to construct a system with a built-in power supply.
If the following conditions are not satisfied, it is necessary to examine the use of the power supply adapter or
dedicated power supply in the system configuration.
1) As the current capacity of the built-in power supply is 0.35 A, Total current consumption of remote I/O
stations and I/O equipment that receive power from built-in power supply
≤ 0.35 A.
2) As the minimum operating voltage from the CC-Link/LT built-in master is 20.4V for each remote module,
General-purpose power supply voltage - Voltage drop
≥ 20.4V
Do not exceed the maximum input voltage (28.8V DC).
There is a formula (Refer to Subsection 9.6.3.) to test the system configuration with regard to the voltage drop
of the cable.
If the total current consumption or the voltage drop due to the cable is too large, take the following
countermeasures.
When the total current consumption is large or the minimum operating voltage (20.4V DC) for each
station is not assured
• Add power adapters or dedicated power supplies.
(Use power adapters or dedicated power supplies so that the power supplied to the system is divided
accordingly.)
When the voltage drop is large or the minimum operating voltage (20.4V DC) of each station is not
assured
• Shorten the CC-Link/LT dedication flat cable
(Shorten the maximum distance from the Built-in master to remote I/O stations.)
• Add power adapters or dedicated power supplies.
(Use power adapters or dedicated power supplies so that the power supplied to the system is divided
accordingly.)
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