Azbil 5LX7 A1 Series, Руководство пользователя, Страница: 7 / 24

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Chapter 1. OVERVIEW
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Features
•
This Increased-safety explosion-proof limit switch incorporates an internal
flameproof switch.
•
Conforms to Japanese explosion-proof standards.
•
The internal switch is the two-circuit double-break type.
•
Can be used in hydrogen atmospheres.
•
IP67 seal allows outdoor use.
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Applicable laws and standards
WARNING
Be sure to use this limit switch within the ranges specified below for certified explosion-protected elec-
trical equipment. Failure to do so may cause a serious accident.
1. This limit switch is certified as explosion-protected electrical equipment by
the Technology Institution of Industrial Safety (TIIS) in accordance with
“Recommended Practice for Explosion-Protected Electrical Installations in
General Industries” (2008 guidelines, which conform to international standards).
2. Explosion-proof structure d e (d: flameproof enclosure, e: increased-safety)
3. Gas group and temperature class IIC T6
4. Hazardous area classification Gas atmospheres in hazardous Zones 1 and 2
5. Operating temperature
−10 to +60 ˚C
6. Operating humidity 45 to 85 %RH
7. Storage temperature −10 to +60 ˚C (standard type)
−10 to +100 ˚C (H type)
−40 to +60 ˚C (L type)
−10 to +60 ˚C (if stored using protective plug(s))
8. Storage humidity range 98 %RH max. (if stored using protective plug(s))
9. Protective structure IP54/IP67
10. Example of explosive gas classification
“Recommended Practice for Explosion-Protected Electrical Installations in General Industries” (2006, for gases and vapors)
Temperature class T1 T2 T3 T4 T5 T6
Explosive gas class Over 450 °C Over 300 to 450 °C Over 200 to 300 °C Over 135 to 200 °C Over 100 to 135 °C Over 85 to 100 °C
Explosion-pr
ot
ec
ted elec
tr
ical
equipmen
t g
roup
II
IIA
Acetone
Ammonia
Ethyl acetate
Benzene
Carbon monoxide
Methane
Methanol
Propane
Toluene
Ethanol
Vinyl chloride
Butyl acetate
Ethylbenzene
Dimethylamine
Propylene
Propan-1-ol
Butane
Methyl
methacrylate
Octane
Hexane
Cyclohexane
Butyl chloride
Pentane
1-Octanol
Gasoline
Kerosene
Naphtha
Acetaldehyde
Trimethylamine
Ethyl nitrite
IIB
Acrylonitrile
Hydrogen cyanide
Cyclopropane
Coke oven gas
Ethyl acrylate
Ethylene
Ethylene oxide
1,3-butadiene
Acrylic aldehyde
Crotonaldehyde
Dimethyl ether
Tetrahydrofuran
Ethyl methyl ether
Diethyl ether
Dibutyl ether
Tetrafluoroethylene
IIC Hydrogen Acetylene Carbon disulfide Ethyl nitrate
Note: Switches classified as IIC T6 can be used with a gas or vapor listed inside the bold lines.