4-29
4 Installation and Wiring
NJ-series CPU Unit Hardware User’s Manual (W500)
4-4 Wiring
4
4-4-1 Power Supply Wiring
DC Power Source
Supply 24 VDC. Keep voltage fluctuations within the specified range.
Power Supply Capacity
The maximum power consumption is 50 W (NJ-PD3001) per Rack.
When you select the power supply, consider that surge current will flow when the power is turned
ON.
Refer to 3-3-1 Models and Specifications for information on surge current specifications.
RUN Output
This output is ON when the CPU Unit is operating; it is OFF when the CPU Unit is in PROGRAM
mode or a Controller error in the major fault level occurs.
The RUN output can be used to control external systems, such as in an emergency stop circuit that
turns OFF the power supply to external systems when the CPU Unit is not operating. (Refer to 4-2
Fail-safe Circuits for more information.)
Crimp Terminals
The terminals on the Power Supply Unit are M4, self-raising terminals with screws.
• Use crimp terminals for wiring.
• Do not connect bare stranded wires directly to terminals.
• Tighten the terminal block screws to the torque of 1.2 N·m.
• Use crimp terminals (M4) having the dimensions shown below.
• Always remove any dustproof labels that are on the top of the Units when they are shipped
before you turn ON the power supply. If the labels are not removed, heat will accumulate and
malfunctions may occur.
Precautions for Correct UsePrecautions for Correct Use
Do not allow wire clippings, shavings, or other foreign material to enter any Unit. Otherwise, Unit
burning, failure, or malfunction may occur. Cover the Units or take other suitable countermea-
sures, especially during wiring work.
Model Allowable voltage fluctuation range
NJ-PD3001
19.2 to 28.8 VDC (24 VDC 20%)
Item NJ-PD3001
Contact form SPST-NO
Maximum switching
capacity
240 VAC: 2 A for resistive loads
120 VAC: 0.5 A for inductive loads
24 VDC: 2 A for resistive loads
7 mm max.
7 mm max.
Crimp Terminals for DC Power Supplies
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