Notes on wiring

6F8A0870

Notes on wiring

5.1 Cables CAUTION

(1)Select the cable runs away from electrical equipment (motors, transformers, or radio transmitters) which causes electromagnetic or electrostatic interference.

(2)Deterioration of flowmeter circuit insulation occurs if the converter interior or cable ends get wet or humidified. This in turn causes malfunction of flowmeter or noise problems. Avoid a rainy day if the flowmeter is to be installed outdoors. Even indoors, prevent water from splashing over the flowmeter. Try to finish the wiring as quickly as possible

(3)The converter has an arrestor installed inside. Therefore, do not conduct a withstand voltage test for the converter. To check the insulation of the converter, use a voltage of 250Vdc or less.

(4)After wiring, be sure to install the terminal block protection cover.

(5)Because the excitation cable and flow rate signal cable transmit very delicate signals, pass each of

Separate

them separately through a thick steel conduit tube, keep them away from the large current wiring as

far as possible, and do not install them in parallel.

 

5.1 Cables

Separate

Separate

Use the kind of cables shown in Table 5.1 to wire the converter.

Table 5.1 Installation Cables

 

 

Nominal

Finished

 

Name

Cable name

cross-section

outer

Description

 

 

al area

diameter

 

 

 

 

 

 

Power cable

3-core vinyl sheathed cable or 2-core vinyl

2 mm²

11~13mm

CVV JIS C 3401 or

sheathed cable

equivalent

Output

The number of conductors the cable contains differs depending on the

CVV-S JIS -258-C or

specification of the output signal cable.

 

 

signal cable

Use a shielded cable of finished outer diameter 11 to

13mm and

equivalent

 

nominal cross-sectional area 1.25mm2.

 

 

 

Flow rate

2-core shielded chloroprene cabtyre cable

0.75 mm2

 

2PNCT-S

11~13mm

JIS C 3327 or

signal cable

( Rubber covered cable )

 

 

equivalent

 

 

 

 

 

 

 

 

Excitation

3-core chloroprene cabtyre cable

2 mm2

 

2PNCT

cable

( Rubber covered cable )

1.25 m2

11~13mm

JIS C 3327 or

 

 

 

 

equivalent

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Toshiba LF414 manual Notes on wiring, - 36 -, 6F8A0870, 1 Installation Cables