6-3
Chapter 6: Cautions regarding Explosion-Proof Models
[2. FM Explosion-proof]
Select an installation location for an FM explosion-proof model AVP in accordance
with the following criteria.
• Hazardous areas in which this device can be installed are defined as follows.
[Explosion-proof]
Class I, Division 1, Group A, B, C, and D
[Flameproof]
Class I, Zone 1, AEx d IIC T6
[Dust-ignition]
Class II and III, Division 1, Group E, F, and G
*NEC: NFPA70 - National Electric Code. For details, see the text of the NEC.
Dustproof and waterproof performance specifications: TYPE 4X, IP66
Ambient temperature range: −40 to +80°C (T6 < 80°C)
Warning
•
Fasten the cover sufficiently tightly, and do not under any circumstances remove
it with the power on if there is an explosive atmosphere surrounding the device.
Doing so can cause an explosion to occur.
Caution
•
In accordance with NEC provisions, at the device’s signal line exit ports be sure to
perform electrical conduit piping work using FM-certified sealing fittings. When
doing this work, make sure that the distance from the conduit entrance to the sur-
face of the sealing compound is at most 457 mm (18 inches).
• When using the device, give sufficient consideration to preventing corrosion, defor-
mation, damage, etc. with respect to the products case, cover, and the like.
• For details regarding piping work, see NEC articles 501, 502, and 503.
For gas Ambient atmosphere of acetylene, ethylene, propane, etc.
Division 1 or 2 hazardous area according to NEC, article 500*
For gas Ambient atmosphere with gas ignition point of
85°C or higher
Explosive gas classified in IIC
Zone 1 or 2 hazardous area according to NEC, article 505*. Zone 0 is not possible.
Flammable dust
For flammable fibers
Ambient atmosphere of metal dust, coal or carbon
black dust, or grain dust
Division 1 or 2 hazardous area according to NEC, article 500*
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