Yokogawa MLX Manuel d'utilisateur télécharger pdf (Page 13)

Page 13 of 49

IM 60A02S01-01E-A

- Class I, Zone 2, Group IIC T4.

- Tamb. –40°C to 80°C

• Enclosure rating: NEMA 4X.

• Temperature Class: T4

• Ambient Temperature: –40°C to 80°C

Note 2. Entity Parameters

• Intrinsically Safe Apparatus Parameters

[Groups A - G]

Ui = 24 V Ci = 0 pF

Ii = 150 mA Li = 0 µH

Pi = 0.65 W

Note 3. Wiring

• All wiring shall comply with National Electrical Code ANSI/NEPA70 and Local

Electrical Codes.

• For an ambient temperature ≥70°C, heat resistant cables shall be used with a

rating of at least 20°C above the ambient temperature.

• In hazardous location, wiring shall be in conduit.

WARNING: A SEAL SHALL BE INSTALLED WITHIN 50 cm OF THE

ENCLOSURE.

When installed in Division 2,“FACTORY SEALED, CONDUIT SEAL NOT

REQUIRED”.

Note 4. Installation

• Installation should be in accordance with ANSI/ISA RP12.6 “Installation of

Intrinsically Safe Systems for Hazardous (Classified) Locations” and the

National Electric Code (ANSI/NFPA 70).

• The safety barrier must be FM approved.

• Strictly observe the “WARNING” on the attached nameplate.

WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC

SAFETY.

WARNING: DO NOT OPEN COVERS WHEN AN EXPLOSIVE ATMOSHPERE

MAY BE PRESENT. INSTALL IN ACCORDANCE WITH THE INSTRUCTION

MANUAL.

Note 5. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized

representative of Yokogawa Electric Corporation is prohibited and will void Factory

Mutual Explosionproof Approval.

Note 6. Special Conditions for Safe Use

• In the case where the enclosure of the MLX is made of aluminum, it must be

installed such, that, even in the event of rare incidents, ignition sources due to impact

and friction sparks are excluded.

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Yokogawa MLX Manuel d'utilisateur Page 13