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MELSEC-F series expansion power supply unit.
[Features]
· Used when there is not enough internal power supply for an expansion block or special block/unit.
· Power consumption: Maximum 20 W (FX3U-1PSU-5V), maximum 25 W (FX3UC-1PS-5V).
[Applications]
· For expansion unit and expansion block.
Part Number
Configured Part Number is shown.
FX3UC-1PS-5V

FX3U-1PSU-5V
Use this unit if not enough internal power capacity is available to supply power to the output expansion blocks or special expansion blocks added to an FX3G or FX3U sequencer (AC power type).
Use this unit if not enough internal power supply is available when the FX3 intelligent function unit is connected to an FX5U CPU unit.
FX5U CPU unit: Up to 2 units (FX5-1PSU-5V, FX3U-1PSU-5V) can be connected.
FX3G sequencer: Only 1 FX3U-1PSU-5V unit can be connected per system.
FX3U sequencer: Up to 2 FX3U-1PSU-5V units can be connected per system.
"Connecting to an FX5U CPU unit"
Connecting to an FX5U CPU unit requires FX5-CNV-BUS or FX5-CNV-BUSC. Select either one according to the system configuration.
| Power Supply Voltage | 100 to 240 V AC |
|---|---|
| Power Supply Voltage Tolerance Range | 85 to 264 V AC |
| Rated Frequency | 50/60 Hz |
| Allowable Momentary Power Outage Duration | The following applies depending on the power supply used. · 100 V AC power supply: Operation continues after a momentary power outage of 10 ms or less. · 200 V AC power supply: Operation continues after a momentary power outage of 100 ms or less. |
| Inrush Current | Maximum 30 A for 5 ms or less / 100 V AC Maximum 65 A for 5 ms or less / 200 V AC |
| Power Consumption | Maximum 20 W |
| Output Current (For Internal Supply) | 24 V DC: 0.3 A 5 V DC: 1 A |
The output current changes as shown in the derating graph below depending on the ambient operating temperature.
Use the system within the output current range according to this derating graph.

Output Current Range

FX3UC-1PS-5V
Use this unit if not enough internal power is available to be supplied to the expansion blocks and special blocks/units used with an FX3GC or FX3UC basic unit.
It can also be used as a conversion adapter when connecting an FX2N I/O expansion block or FX2N/FX3U special expansion block to an FX3GC, or connecting an FX0N/FX2N I/O expansion block or FX0N/FX2N/FX3U special block/unit to an FX3UC.
| Power Supply Voltage | 24 V DC, +20%, -15% |
|---|---|
| Power Supply Fuse | 125 V AC, 3.15 A |
| Inrush Current | Maximum 30 A, 0.5 ms / 24 V DC |
| Output Current | Maximum 1 A, 5 V DC |
| Power Consumption | Maximum 25 W |
| Allowable Momentary Power Outage Duration | Operation continues after a momentary power outage of 5 ms or less |
| Part Number |
|---|
| FX3UC-1PS-5V |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | RoHS | Application | Applicable Series | other specifications |
|---|---|---|---|---|---|---|---|---|
MYR 628.33 MYR 502.66 | 1 Piece(s) | 97 Day(s) | 6 | For Connecting Terminal Type Expansion Equipment to FX3UC Sequencers, For Additional Power when Expanded Power Supplies (5 VDC) are Insufficient | FX3UC | An FX3UC base unit that is used when the internal power supply for the expansion block, special block/unit is insufficient. Can also be used as a conversion adapter when connecting FX0N/FX2N special blocks/units or FX0N/FX2N input/output expansion blocks to the FX3UC. |
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| Type | Expanded Power Supply Unit |
|---|
Please check the type/dimensions/specifications of the part FX3UC-1PS-5V in the MELSEC-F Series Expansion Power Supply Unit Expansion Device Option series.
| Part Number |
|---|
| FX3U-1PSU-5V |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | RoHS | Application | Applicable Series | other specifications |
|---|---|---|---|---|---|---|---|---|
MYR 725.00 | 1 Piece(s) | 97 Day(s) | 6 | For Additional Power when Expanded Power Supplies (5 VDC) are Insufficient | FX3U / FX3G | Use when the internal power supply capacity for the FX3U sequencer (AC type) special expansion block or output expansion block is insufficient. Up to two FX3U-1PSU-5V can be connected in one system. |



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