ABB LLT100, Operating Instructions Manual

OI-LLT100-EN Rev. D | 

User Guide   

49   

Ex safety aspects and IP protection 
(North America)

Applicable standards

According to FM Approvals Standards which can assure 
compliance with Essential Safety Requirements.

– FM 3600: Electrical Equipment for use in Hazardous 

(Classified) Locations, General Requirements.

– FM 3615: Explosion proof Electrical Equipment.

– FM 3616: Dust ignition protected.

– FM 3810: Electrical and Electronic Test, Measuring and 

Process Control Equipment.

– ANSI/ISA 60079-0 (general requirements)

– ANSI/UL 60079-1 (flameproof enclosure)

– ANSI/ISA 60079-26 (equipment with EPL Ga)

– ANSI/UL 60079-31 (equipment dust ignition protection by 

enclosure)

– ANSI/ISA 12.27.01 (requirement for process sealing)

– ANSI/IEC 60529 (enclosure ingress protection)

– ANSI/NEMA 250: Enclosure for Electrical Equipment 

(1000 volts maximum).

FM Certificate for class & divisions

– US: Class I, Division 1, Groups A, B, C, D T5 –50 °C ≤ Ta 

≤ 85 °C

– US: Class I, Division 1, Groups A, B, C, D T6 –50 °C ≤ Ta 

≤ 75 °C

– CAN: Class I, Division 1, Groups B, C, D T5 –50°C  ≤ Ta 

≤ 85 °C

– CAN: Class I, Division 1, Groups B, C, D T6 –50  °C  ≤ Ta 

≤ 75 °C

– US & CAN: Class II/III, Division 1, Groups E, F, G T5 –50 °C 

≤ Ta ≤ 85 °C

– US & CAN: Class II/III, Division 1, Groups E, F, G T6 –50 °C 

≤ Ta ≤ 75 °C

– (for LLT100.XX.A to G – all flanges except Triclover)

– Enclosure Type 4X – IP66/IP67

Certificates number:
 

FM16US0106X, FM16CA0060X

Explanation for class & division ratings:
The LLT100 Series laser level transmitters have been certified 
by FM Approvals for the following class, divisions and gas 
groups, hazardous classified locations, temperature class and 
types of protection.

– Explosion proof (US) for Class I, Division 1, Groups A, B, C 

and D, hazardous (classified) locations.

– Explosion proof (Canada) for Class I, Division 1, Groups B, 

C, and D, hazardous (classified) locations.

– Dust ignition proof for Class II and III, Division 1, Groups E, 

F, and G, hazardous (classified) locations.

– T5: Temperature class of the LLT100 (corresponding to 

100 °C max) with a Ta from –50 °C to +85 °C

– T6: Temperature class of the LLT100 (corresponding to 

85 °C max) with a Ta from –50 °C to +75 °C

– Enclosure Type 4X applications indoors/outdoors.

For proper field installation of LLT100 Series instruments, see 
the related installation section.
For class and division marking for Canada, metric version of 
the cable entry ports is not applicable.
For class and division marking for Canada, gas group A is not 
applicable.

FM Certificate for Class & zones for gases:

– Class I, Zone 0/1, AEx/Ex db [op is T6 Ga] IIC T6...T5 Ga/Gb 

–50 °C ≤ Ta ≤ +75 °C...+85 °C (for LLT100.XX.C to G only)

– Class I, Zone 1, AEx/Ex db [op is Ga] IIC T6...T5 Gb –50 °C 

≤ Ta ≤ +75 °C...+85 °C (for LLT100.XX.A to B only)

– Enclosure Type 4X – IP66/IP67

Certificates number:
 

FM16US0106X, FM16CA0060X

Explanation for class & zone ratings:

– Explosion proof Class I, Zone 0/1 for gas groups IIC

– Zone 0/1: only the LLT100 process interface complies with 

Zone 0. The rest of the instrument complies with Zone 1.

– Zone 1: the whole instrument can be installed in Zone 1.

– Ga/Gb: Part of the LLT100 complies with equipment 

protection level “a” (the process interface). The remaining of 
the LLT100 complies with Equipment protection level “b” for 
Gas atmosphere.

– AEx/Ex db: Explosion protected by a flameproof enclosure

– [op is T6 Ga]: Optical intrinsic safety used for equipment 

protection level “a” for Gas atmosphere

– T5: Temperature class of the LLT100 (corresponding to 

100 °C max) with a Ta from –50 °C to +85 °C

– T6: Temperature class of the LLT100 (corresponding to 

85 °C max) with a Ta from –50 °C to +75 °C

Enclosure Type 4X applications Indoors/ Outdoors.
For a correct installation in field of LLT100 Series, see the 
related installation section.