Toshiba LF600F - Manual (Page 23)

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Notes on wiring
A CAUTION
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LF602F
Select the cable runs away from electrical equipment (motors, transformers, or radio
transmitters) which causes electromagnetic or electrostatic interference.
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
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.
After wiring, be sure to install the terminal block protection cover.
Because the excitation cable and flow rate signal cable transmit very delicate signals, pass each
of 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
Use the kind of cables shown in Table 5.1 to wire the converter.
Table 5.1 Installation Cables
Name Cable name
Nominal
cross-sectional
area
Finished
outer
diameter
Description
Power cable
3-core vinyl sheathed cable or
2-core vinyl sheathed cable
2 mm^ 11~13mm
CW-JISC3401,
IEC60695,
IEC60754,
IEC60227,
IEC60245
or equivalent
Output signal
cable
The number of conductors the cable contains differs depending on
the specification of the output signal cable.
Use a shielded cable of finished outer diameter 11 to 13mm and
nominal cross-sectional area 1.25mm2.
CW-SJIS-258-C
or equivalent
Flow rate
signal cable
2-core shielded chloroprene
cabtyre cable
0.75 mm2
11~13m
m
2PNCT-S
JIS C 3327
or equivalent
Excitation
cable
3-core shielded chloroprene
cabtypre cable 2 mm2
1.25 m2
11~13m
m
2PNCT
JIS C 3327
or equivalent
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LF602F
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LF602F
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