Omron NX1P2 series, Руководство пользователя по оборудованию

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I/O Power Supply
I/O power is supplied to the built-in I/O of the NX1P2 CPU Unit, the I/O circuits of each NX Unit on the
CPU Rack, and external devices connected to the NX Units.
I/O power for the built-in I/O of the CPU Unit is used for driving the PNP (sourcing) type built-in I/O
output circuit. This is separate from power supply for the I/O circuits of the NX Units and external devi-
ces connected to the NX Units. Refer to Current consumption from I/O power supply in the table under
3-1-4 Terminal Blocks on page 3-12 in Output Specifications on page 3-17 for details on the current
specifications.
Some NX Units receive I/O power through the NX bus, and others receive from external devices. If
any NX Unit on the CPU Rack receives I/O power through the NX bus, you need to prepare an exter-
nal I/O power supply device. For details on how to supply I/O power to NX Units, refer to the datasheet
included in the user’s manuals for the NX Units.
NX Units (8 max.)
To external devices
End Cover
I/O power supply
terminals Cn(+V)/0Vn
terminal
Built-in I/O
NX bus connector
NX-series
NX1P2 CPU
Unit
Additional I/O Power
Supply Unit
I/O power supply
(24 VDC, etc.)
I/O power supply
(24 VDC)
○ ○ ○ ○ ○ ○
I/O power supply
Precautions for Correct Use
Make sure to prepare separate power supply devices for NX Unit power and I/O power. Using
the same power supply for them may generate noise and result in malfunction.
4-1-2
NX-series Power Supply-related Units
There are three types of NX-series power supply-related Units: Additional NX Unit Power Supply Unit,
Additional I/O Power Supply Unit, and I/O Power Supply Connection Unit. The following table explains
each Unit.
Unit name Description
Additional NX
Unit Power Sup-
ply Unit Supply additional NX Unit power via this Unit if the total power consumption of the internal
circuits of the NX Units on the CPU Rack exceeds the NX Unit power supply capacity of the
CPU Unit.
4 Designing the Power Supply System
4-3
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
4-1 Power Supply System
4
4-1-2
NX-series Power Supply-related Units