5-4-1
Wiring the Unit Power Supply
This section describes the wiring of the Unit power supply to the Unit power supply terminals on the
CPU Unit.
Connect the DC power supply to the Unit power supply terminals on the left side of the input terminal
block.
The + terminals and - terminals are internally connected to each other
.
Y
ou can use the unwired terminals for through-wiring to an Additional NX Unit Power Supply Unit or to
the Unit power supply terminals on another NX1P2 CPU Unit.
When you supply the Unit power through the unwired terminals, be careful not to exceed 4 A, the cur-
rent capacity of power supply terminals.
Refer to 4-4-1 Selecting the Unit Power Supply on page 4-22 for information on the DC power supply
to connect.
Left side of the input terminal block
This terminal arrangement is common to all models of the CPU Unit.
Refer to Input Terminal Block on page 3-13
under 3-1-4 Terminal Blocks on page 3-12 for details.
+ -
-+
DC24V
Through-wiring for
unwired terminals
5-4-2
Wiring the Additional NX Unit Power Supply Unit
For information on wiring the Additional NX Unit Power Supply Unit, refer to the NX-series System
Units User’s Manual (Cat. No. W523-E1-05 or later).
5-4-3
Wiring the Additional I/O Power Supply Unit
For information on wiring the Additional I/O Power Supply Unit, refer to the NX-series System Units
User’s Manual (Cat. No. W523-E1-05 or later).
5-4-4
Wiring the Protective Devices
For information on wiring the protective devices to protect against short circuits and overcurrents of
external circuits, refer to 4-4-3 Selecting Protective Devices on page 4-25.
5 Installation and Wiring
5-44
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
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