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= (CPU Unit power consu Total power consumption from NX Unit power supply of NX
Units connected to CPU Unit)/NX Unit power supply efficiency of CPU Unit
= 7.05 W + (0.85 W × 1 + 0.90 W × 4 + 1.20 W × 3)/0.8
= Approx. 17.1 W
The above is the constant power consumption during operation. When you select the power supply,
consider the inrush current that will flow when the power is turned ON.
Refer to
Electrical and Mechanical Specifications
on page 3-2 for information on inrush current specifications.
Precautions for Safe Use
Select an external power supply with sufficient capacity by considering the power supply ca-
pacity or inrush current when the power is turned ON. Otherwise, the external power supply
may not be turned ON or it may malfunction due to unstable voltage.
4-4-2
Selecting the I/O Power Supplies
This section describes how to select the I/O power supplies for the CPU Rack.
Recommended Power Supplies
Use an SELV power supply that meets the following conditions for the I/O power supply.
• Has overcurrent protection.
• Has double or reinforced insulation between the input and output.
• Has an output voltage of 5 to 24 VDC (4.5 to 28.8 VDC).*1
*1. Use an output voltage that is appropriate for the I/O circuits of the NX Units and the connected external devi-
ces.
Recommended Power Supplies: S8VK-S Series (manufactured by OMRON)
Calculating the Required Power Supply Capacity of the I/O Power
Supply for NX Units
Use the calculation method that is described in
4-3-2 Designing the I/O Power Supply from the NX
on page 4-14 and calculate the total current consumption from the I/O power supply and the re-
quired power supply capacity of the I/O power supply.
Unlike the Unit power supply, it is not necessary to use only one I/O power supply to supply power to
all NX Units on the CPU Rack.
Precautions for Safe Use
Select an external power supply with sufficient capacity by considering the power supply ca-
pacity or inrush current when the power is turned ON. Otherwise, the external power supply
may not be turned ON or it may malfunction due to unstable voltage.
4 Designing the Power Supply System
4-24
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
Содержание NX1P2 series
Страница 8: ...Manual Structure 6 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 52: ...Revision History 50 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 82: ...2 System Configuration 2 10 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 170: ...a b Flat blade screwdriver 1 2 5 Installation and Wiring 5 26 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 174: ...4 Close the Memory Card cover 5 Installation and Wiring 5 30 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 176: ...4 Close the Memory Card cover 5 Installation and Wiring 5 32 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 224: ...0 4 mm Side view Front view 2 5 mm 5 Installation and Wiring 5 80 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 258: ...Appendices A 10 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 259: ...I Index I 1 NX series NX1P2 CPU Unit Hardware User s Manual W578 I...
Страница 262: ...Index I 4 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 263: ......