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3 Installation and Wiring
NA-series Programmable Terminal Hardware(-V1) User’s Manual (V125)
3-4 Wiring Methods
3
3-4-1 Power Supply Wiring
3-4 Wiring Methods
This section describes how to wire an NA Unit.
Connect a 24-VDC power supply to the power supply input terminals.
• Use a DC power with a slight voltage fluctuation and that will provide a stable output even if
the input is momentarily interrupted for 10 ms. Also use the one with reinforced insulation or
double insulation.
Rated Power Supply Voltage: 24 VDC (Allowable range 19.2 to 28.8 VDC)
• Do not perform a dielectric strength test.
Precautions for Correct Use
• Do not allow wire clippings, shavings, or other foreign material to enter the NA Unit. Other-
wise, burning, failure, or malfunction may occur. Cover the NA Unit or take other suitable
countermeasures, especially during wiring work.
• To use a power supply that does not contain a protection circuit, supply power to the NA Unit
through a fuse or other protective element.
• Tighten the terminal screws for the unit and power supply cables to an adequate torque.
The specifications of a connectable power supply are given in the following table.
Make sure that the voltage and current that are input to the NA Unit are within the specified
ranges. Inputting voltages or currents that are outside of the specified ranges may cause acci-
dents or fire.
Be sure that all terminal block screws and cable connector screws are tightened to the torque
specified in the relevant manuals. The loose screws may result in fire or malfunction.
Do not touch any equipment when power is being supplied or immediately after the power
supply is turned OFF. You may be burnt.
3-4-1 Power Supply Wiring
Power Supply Specifications
Item Value
Rated supply voltage 24 VDC
Allowable voltage fluctuation range 19.2 to 28.8 VDC (24 VDC ±20%)
Power supply capacity NA5-15W-V1: 29 W min.
NA5-12W-V1: 25 W min.
NA5-9W-V1: 23 W min.
NA5-7W-V1: 19 W min.
WARNING
WARNING
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