Installation

Section 3-1

Power Supply

The applicable power supply specifications are as follows.

Item

Value

 

 

Power supply

24 VDC

 

 

Allowable power supply voltage

20.4 to 26.4 VDC (24 VDC –15% to +10%)

fluctuation range

 

 

 

Power supply voltage capacity

NT631-ST211 (B)-EV2:

 

30 W or more (Power supply warm-up time

 

within 200 ms.)

 

NT631C-ST141 (B) /ST153 (B)-EV3:

 

18 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 Nm.

Fork type

7 mm max.

Round type

7 mm max.

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

 

 

 

 

 

Note Conformance to Shipbuilding Standard

Cover the entire PT with electromagnetic shielding, and ground the elec- tromagnetic shielding to the control panel with copper tape or other elec- trically conductive tape.

Recommended electromagnetic shielding: E09F100 or E09R13502P

Manufacturer: Seiwa Electric MFG, Co., Ltd.

Use gaskets or other materials to completely shield all openings and other gaps in the control panel.

Use copper tape or other electrically conductive tape to shield gaps between the cutout and the PT before securing the PT in place.

To suppress noise terminal voltage, perform installation under the follow- ing conditions. It is recommended to use the following product for the DC power supply.

Recommended Power Supply model: S82K-03024

Manufacturer: OMRON

3-1-4 Grounding

The NT631/NT631C has a functional ground terminal ( ).

Carry out wiring under the following conditions.

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Omron NT631C Grounding, Power Supply, Applicable power supply specifications are as follows, Parts Used for Connection