Omron NX Series Hardware User Manual

NX-series
NX502 CPU Unit
• Total current consumption of I/O power supply for
the range Additional I/O Power Supply Unit 1
supplies I/O power supply
(Total of (1) to (5) = 3.0 A)
• The range Additional I/O
Power Supply Unit 2
supplies I/O power supply
Additional
I/O Power
Supply
Unit 1
Additional
I/O Power
Supply
Unit 2
NX Unit
(supply
from the
NX bus)
NX Unit
(supply
from the
NX bus)
NX Unit
(supply
from the
NX bus)
NX Unit
(supply
from the
NX bus)
NX Unit
(supply
from the
NX bus)
NX Unit
(supply
from
external
source)
End Cover
To external
devices
To external
devices
To external
devices
External
device
I/O power
supply
(24 VDC)
I/O power
supply
(24 VDC)
(1) (2) (3) (4) (5)
I/O power supply I/O power supply
I/O power supply current consumption of each Unit
(1)
: 0.0 A
*1
(supply from the NX bus)
(2), (3) : 0.5 A each (supply from the NX bus)
(4) : 0.0 A (supply from external source)
(5) : 2.0 A (supply from the NX bus)
*1. The current consumption of the Additional I/O Power Supply Unit is not actually 0 A. However, a value of 0 A
is used in this calculation example.
In actual calculations, add the current consumption from the I/O power supply that is given in the NX-series
Data Reference Manual (Cat. No. W525).
l
Outline
Find the I/O power supply voltage of the NX Unit that is the farthest from the Additional I/O Power
Supply Unit 1.
In this example, the I/O power supply voltage of Unit (E) is found.
l
Conditions
Assume that an I/O power supply voltage of 24.00 VDC is supplied to the I/O power supply termi-
nals on the Additional I/O Power Supply Unit 1.
l
Procedure
1 Use the following formula to calculate the total current consumption from the I/O power supply.
Total current consumption from the I/O power supply = (1) + (2) + (3) + (4) + (5)
= 0.0 A + 0.5 A + 0.5 A + 0.0 A + 2.0 A
= 3 A
2 Find the I/O power supply voltage and make sure that it is within the voltage specifications of
the I/O circuits of the NX Units and the connected external devices.
4 Designing the Power Supply System
4-19
NX-series NX502 CPU Unit Hardware User's Manual (W629)
4-3 Designing the I/O Power Supply System
4
4-3-2 Designing the I/O Power Supply from the NX Bus

Omron NX Series Specifications

General

Brand	Omron
Model	NX Series
Category	Controller
Language	English