Designing The Io Power Supply System; Io Power Supply Method - Omron PROFINET NX-PNC202 User Manual

5-3 Designing the IO Power Supply Sys-
tem
This section describes how to design the IO power supply to the Profinet IO Device Terminal.
5-3-1

IO Power Supply Method

There are the following two methods to supply the IO power supply to the Profinet IO Device Terminal
depending on the type and model of the NX Units.
Supply method
Supply from the NX bus Power is supplied through the NX bus connectors by connecting an IO power supply to
Supply from external
source
Refer to the user's manuals for individual NX Units or to the NX-series Data Reference Manual (Cat.
No. W525) for the power supply method for specific NX Units.
An example is shown below.
I/O power supply
terminals
I/O power
supply
(DC)
NX-series PROFINET Coupler Unit User's Manual (W623)
the IO power supply terminals on the PROFINET Coupler Unit or Additional IO Power
Supply Units.
Power is supplied to the Units from an external source.
IO power is supplied by connecting an IO power supply to the terminal blocks on the
Units.
Supplied from the NX bus.
PROFINET DC Input Relay
Unit Output
Coupler Unit
Unit
Terminal block
External
input
External
device
output
device
I/O power supply (AC)
Supplied from external source.
5 Designing the Power Supply System
Description
Relay Transistor
Output Output Unit
Unit
End Cover
External
output
External
device
output
device
Terminal block
5
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