Omron NX-ILM400, User Manual

Page: 67 / 176

4 - 9
4 Installation and Wiring
NX-series IO-Link Master Unit User’s Manual (W567)
4-2
Con
n
ect
ing
the
P
o
wer
Su
pp
ly and
Gr
o
u
n
d
Wires
4
4-
2-1 I/O Power
Supply Meth
ods a
nd Applicatio
ns
4-2 Connecting the Power Supply and
Ground Wires
There are the following two types of power supplies that supply power to the IO-Link Master Unit as an
NX Unit.
The methods for providing and wiring the above NX Unit power supplies depend on the specifications
of the CPU Unit and Slave Terminal the NX Units are connected to. Refer to
Designing the Power Sup-
ply System and Wiring in the hardware user’s manual for the connected CPU Unit or the user’s manual
for the Communications Coupler Unit for information on how to provide and wire the power supplies to
NX Units.
This section describes IO-Link Master Unit I/O power supply applications, I/O power supply methods,
and the I/O power supply total current consumption calculation method.
This section describes the I/O power supply methods and applications for IO-Link Master Units.
The I/O power supply is used for the following applications.
• Power supply for I/O devices
• Power supply for I/O circuits
• Input current in SIO (DI) Mode
• External load current in SIO (DO) Mode
This power is supplied by one of the following methods.
 Supply from the NX Bus
The I/O power supply method depends on the connection position of the IO-Link Master Unit as
described below
• When the IO-Link Master Unit is connected to an NX1P2 CPU Unit: I/O power is supplied through
the NX bus connectors by connecting an I/O power supply to the I/O power supply terminals on
the Additional I/O Power Supply Unit.
• When the IO-Link Master Unit is connected to a Communications Coupler Unit: I/O power is sup-
plied through the NX bus connectors by connecting an I/O power supply to the I/O power supply
terminals on the Communications Coupler Unit or an Additional I/O Power Supply Unit.
Refer to Designing the Power Supply System and Wiring in the hardware user’s manual for the con-
nected CPU Unit for details on when I/O power is supplied in a CPU Rack.
Refer to Designing the Power Supply System and Wiring in the user's manual for the connected
Communications Coupler Unit for details on when I/O power is supplied in a Slave Terminal.
Power supply name Description
NX Unit power supply This is the power supply for NX Unit operation.
I/O power supply
This power supply is used for driving the I/O circuits of the NX Units and for the con-
nected external devices.
4-2-1 I/O Power Supply Methods and Applications
I/O Power Supply Applications
I/O Power Supply Methods