Yokogawa MLX - Manual (Page 12)

Page 12 of 49
IM 60A02S01-01E-A
• 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”.
• All wiring shall comply with National Electrical Code ANSI/NEPA70 and Local
Electrical Codes.
Note 3. 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).
• Strictly observe the “WARNING” on the attached nameplate.
WARNING: OPEN CIRCUIT BEFORE REMOVING COVER. INSTALL IN
ACCORDANCE WITH THE INSTRUCTION MANUAL.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement by other than authorized
representative of Yokogawa Corporation of America is prohibited and will void
Factory Mutual Explosionproof Approval.
Note 5. 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.
b. FM Intrinsically Safe/FM Explosionproof/Dust-Ignition-Proof Type
Caution for FM Intrinsically Safe/FM Explosionproof/Dust-Ignition-Proof type.
Note 1. Model MLX Loop Process Indicators with optional code /FU1 applicable for use in
potentially hazardous locations:
• Certificate No. 4000798
• Conforms to: FM 3600, FM 3610, FMRC 3611, FM 3615, FM 3616, UL 913, UL
1203, UL 60079-0, UL 60079-11
• Explosionproof/Dust-Ignition-Proof for:
- Class I, II, III; Groups A -G; Divisions 1 & 2.
- Class I, Zone 1, Group IIC T4.
- Tamb. –40°C to 80°C
• Intrinsically Safe for:
- Class I, Division 1, II, III; Groups A -G; Divisions 1 & 2.
- Zone 20, Class I, Zone 0
- AEx ia IIC T4
- Tamb. –40°C to 80°C
• Non-Incendive for:
- Class I, II, III; Groups A - D, F, G; Divisions 2.