Omron NT31 NT31C Power Supply Connection, Applicable power supply specifications are as follows

Installation Section 3-1

Note 1. During work at the panel, take care to ensure that no metal scraps enter the unit.

2.The thickness of applicable operation panel is 1.6 mm to 4.8 mm. All fittings must be tightened uniformly to a torque of 0.5 to 0.6 N⋅m in order to ensure water- and dust-resistance. Front sheet of NT31/NT31C may be warped if the tightening is too strong or not uniformity. The panel must not be soiled or warped, and must be able to support an installation that will remain secure and strong.

3-1-3 Power Supply Connection

Connect a 24 VDC power supply to the power input terminals.

Note 1. Depending on how the power is switched ON/OFF, the entire system may stop. Follow the correct procedure when switching the power ON/OFF.

2.Carefully check the wiring before switching ON the power.

3.Do not connect AC power to the DC terminals.

4.Use DC power supplies with low voltage fluctuation.

5.Do not perform a dielectric strength test.

6.If complying with EC directives (low voltage directives), use a power supply with reinforced insulation (compliance with EC directives is planned for June 1998).

24 VDC

Breaker

24 VDC power supply

Power Supply

The applicable power supply specifications are as follows.

Item	Value
Power supply	24 VDC
Allowable power supply voltage fluctuation range	20.4 VDC to 26.4 VDC
	(24 VDC –15%, +10%)
Power supply voltage capacity	15 W or more

Parts Used for Connection

Note For the connection to the power supply terminal block, twisted wires of 2 mm2 or greater cross sectional area and M3.5 size crimp terminals must be used.

Tighten the screws on the terminal block to a torque of 0.8 N⋅m.

Fork type

7 mm or less

Round type

7 mm or less

Recommended Terminals

Maker	Type	Type	Applicable Wire
	(fork type)	(round type)	(stranded wire)
Japan Solderless Terminal MFG	2-YS3A	2-3.5
			2.0 to 2.63 mm2
Fuji Terminal	2-YAS3.5	V2-S3.5
Nichifu Terminal	2Y-3.5	2-3.5

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