50 User Guide | OI-LLT100-EN Rev. D
LLT100
Laser level transmitter
FM Certificate for Class & zones for dusts:
Zone 21, AEx/Ex tb [op is Da] IIIC T85°C...T100°C Db –50°C
≤Ta ≤+75°C...+85°C (for LLT100.XX. A to G)
Enclosure Type 4X – IP66/IP67
Certificates number:
FM16US0106X, FM16CA0060X
Explanation for class & zones rating:
– Dust ignition proof Class I, Zone 21 for dust group IIIC (all
dusts)
– Zone 21: means that the whole instrument can be installed
in Zone 21.
– Db: All the LLT100 complies with equipment protection level
“b” for Dust atmosphere
– AEx/Ex tb: Explosion protected by a dust proof enclosure
– [op is Da]: Optical Intrinsic safety used for equipment
protection level “a” for Dust atmosphere
– T100C: Temperature class of the LLT100 (corresponding to
100°C max.) with a Ta from –50°C to +85°C
– T85C: Temperature class of the LLT100 (corresponding to
85°C max.) with a Ta from –50°C to +75°C.
Specific condition of safe use for ATEX,
IECEx, and cFMus certifications
WARNING
– The LLT100 enclosure contains aluminum.
As such, it is considered a potential risk of
ignition by impact or friction. Care must be
taken during installation and use to prevent
impact or friction.
– Under certain extreme circumstances,
exposed plastic (including powder coating)
and unearthed metal parts of the enclosure
may store an ignition-capable level of
electrostatic charge. Therefore, the user/
installer shall implement precautions to
prevent the buildup of electrostatic charges,
e.g. clean with a damp cloth.
– Process temperature shall not exceed the
respective maximum ambient temperature of
the LLT100 (75°C for T6 or 85°C for T5).
NOTICE
– The LLT100 comprises flamepath joints.
Consult ABB if repair of flamepath joints is
necessary.
– All versions of the LLT100 can emit light
into the Ga area. However, only in versions
LLT100.xx.C to G can the process interface
form a barrier to Ga (Cat 1, former Zone 0)
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