Omron NX Series Hardware User Manual

NX-series
NX502 CPU Unit
a. Total current consumption from I/O power
supply does not exceed the maximum I/O
power supply current (NX Units with the
supply from external source or no supply
are excluded from calculation)
b. The voltage drop in the I/O power supply is
within the voltage specifications of the I/O
circuits of the NX Units and the connected
external devices.
a. Total current consumption from I/O power
supply does not exceed the maximum I/O
power supply current (NX Units with the
supply from external source or no supply
are excluded from calculation)
b. The voltage drop in the I/O power supply is
within the voltage specifications of the I/O
circuits of the NX Units and the connected
external devices.
Additional
I/O Power
Supply
Unit 1
NX Unit
(no
supply)
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
external
source)
• When NX Units that require supply
from the NX bus are on the CPU Rack
• When the maximum I/O power supply current
of the Additional I/O Power Supply Unit 1 is
exceeded
• When the I/O power supply voltage drops
severely
• When the I/O power supply is separated
63 max.
External
device
To external
devices
To external
devices
End Cover
I/O power supply terminals
External
device
I/O power
supply
(DC)
I/O power
supply
(DC)
I/O power supply I/O power supply
l
Maximum I/O Power Supply Current
The maximum I/O power supply current is the maximum current that the I/O power supply that is
connected to the Additional I/O Power Supply Unit can supply through the NX bus connectors to
the NX Units.
For information on the maximum I/O power current supplied from the Additional I/O Power Supply
Unit, refer to the NX-series System Units User’
s Manual (Cat. No. W523).
Calculating the Total Current Consumption from the I/O Power Sup-
ply
The total current consumption from the I/O power supply from the NX bus is the total of the following
current consumptions.
• The current consumption from the I/O power supply that is required for the Additional I/O Power
Supply Unit and for the NX Units that are connected to the Additional I/O Power Supply Unit
•
The current consumption between the NX Units and the connected external devices
Current consumption item Description
Current consumption from I/O power
supply
This is the current that is consumed by the internal circuits that operate on the I/O
power supply.
Specific values are given in the user
’s manuals for individual Units.
4 Designing the Power Supply System
4-16
NX-series NX502 CPU Unit Hardware User's Manual (W629)

Omron NX Series Specifications

General

Brand	Omron
Model	NX Series
Category	Controller
Language	English