Omron NX1P2 series User Manual

4 Designing the Power Supply System
4 - 18
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
4-4 Selecting External Power Supplies
and Protective Devices
This section describes how to select the Unit power supply and the I/O power supply which are the
external power supplies for the CPU Rack, and how to select the protective devices.
This section describes how to select the Unit power supply for the CPU Rack.
Use an SELV power supply that meets the following conditions for the Unit power supply.
• Has overcurrent protection.
• Has double or reinforced insulation between the input and output.
• Has an output voltage of 24 VDC (20.4 to 28.8 VDC).
Recommended Power Supplies: S8VK-S Series (manufactured by OMRON)
 Formula
This section describes how to calculate the required capacity of the Unit power supply for the CPU
Rack.
Use the following formula to calculate the required Unit power supply capacity for each block in the
CPU Rack.
Required Unit power supply capacity of a CPU Unit block = (A) + (B)/(C)
Required Unit power supply capacity of an Additional NX Unit Power Supply Unit block
= ((D) + (E))/(F)
4-4-1 Selecting the Unit Power Supply
Recommended Power Supplies
Calculating the Required Power Supply Capacity of the Unit Power
Supply
Required capacity of the Unit power sup-
ply for the CPU Rack
=
Total of required Unit power supply capac-
ity for each block
(A)
Unit power consumption of the CPU Unit
(B)
Total NX Unit power consumption of NX Units that are connected to the CPU Unit
(C)
NX Unit power supply efficiency of the CPU Unit
(D)
NX Unit power consumption of the Additional NX Unit Power Supply Unit
(E)
Total NX Unit power consumption of NX Units that are connected to the Additional NX
Unit Power Supply Unit
(F)
NX Unit power supply efficiency of the Additional NX Unit Power Supply Unit

Omron NX1P2 series Specifications

General

Brand	Omron
Model	NX1P2 series
Category	Controller
Language	English