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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
3. Selection of the general-purpose power supply connected to the Main unit
When using the CC-Link/LT master function, connect a general-purpose power supply that satisfies the
following condition to the main unit.
If the following conditions are not satisfied, for example, due to a change in the system, then changing the
general-purpose power supply or using a power adapter/dedicated power supply should be considered.
1) The power source must supply a minimum of 20.4V DC to the CC-Link/LT system for the I/O modules to
operate correctly.
Do not exceed the maximum input voltage (28.8V DC) of the power adapter.
→ For the voltage drop calculation, refer to Subsection 9.6.3.
20.4V + voltage drop
≤ General purpose power supply output voltage ≤ 28.8V
2) Select a general-purpose power supply whose rated output current can cope with the value required in
the current consumption calculation (9.6.3)
Rated output current of general-purpose power supply
≥ Total current consumption of remote I/O
stations that receive power from built-in power supply
3) Select a general-purpose power supply whose maximum output current
*1
can cope with the calculated
current value expected at the start-up of the CC-Link/LT system (when the power is turned on).
Maximum output current of general-purpose power supply
≥ 24V DC 30A, 0.5ms
*1. Maximum output current: May be referred to as "peak output current".
If there is no description concerning maximum output current, use the threshold value of the "high
current limiting function".
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