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5 Installation and Wiring
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
5-4 Wiring
5
5-4-1 Wiring the Unit Power Supply
5-4 Wiring
Use the methods that are specified in this manual for wiring the terminal blocks.
Precautions for Correct Use
Do not allow wire clippings or shavings to enter any Unit. Otherwise, Unit burning, failure, or
malfunction may occur. Cover the Units or take other suitable countermeasures, especially
during wiring work.
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.
You 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
current capacity of power supply terminals.
Refer to 4-4-1 Selecting the Unit Power Supply on page 4-18 for information on the DC power supply to
connect.
• Do not input a voltage or current that exceeds the specified range into a Unit or slave. If a volt-
age or current that is outside the specified range is input, the Unit or slave may fail or a fire
may occur.
• Tighten terminal block screws and cable screws to the torques specified in this manual or in
the reference manuals. The loose screws may result in fire or malfunction.
• Do not touch devices while power is supplied or immediately after the power supply is turned
OFF. You may be burnt.
5-4-1 Wiring the Unit Power Supply
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