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In hazardous locations, the PTC-860NI’s only user
interface is its keyboard; the accessory ports are not
suitable for use in hazardous locations.
WARNING! Remove the PTC-860NI from the potentially
hazardous area if the unit is damaged or suspected of being
damaged.
WARNING! Remove the PTC-860NI from the potentially
hazardous location should the location become hazardous
due to failure of containment systems, equipment, or other
causes that would expose the unit to volatile substances.
TABLE 1
Hazardous (classified) locations in accordance with Article 500,
National Electrical Code - 1990
Class I
Flammable gases or vapors
Division 2
•
Liquids and gases are in closed containers, or the
systems are handled, processed, or used
•
Concentrations are normally prevented by positive
mechanical ventilation
•
Adjacent to a Class I, Division 1 location
Group A:
Atmospheres containing acetylene
Group B:
Atmospheres such as acrolein, butadiene, ethylene oxide,
hydrogen, propylene oxide, or gases or vapors equivalent in
hazard to hydrogen, such as manufactured gas
Group C:
Atmospheres such as cyclopropane, ethylene, ethyl ether, or
gases or vapors equivalent in hazard
Group D:
Atmospheres such as acetone, alcohol, ammonia, benzine,
benzol, butane, gasoline, hexane, lacquer solvent vapors,
naphtha, natural gas, propane, or gases or vapors equivalent
in hazard
10