ABB LLT100 Operating Instructions Manual page 52

LLT100
Laser level transmitter
– level "a" (the process interface) and the remaining of the
LLT100 complies with equipment protection level "b" for Gas
atmosphere
NOTICE
The number indicated on the safety label close to
the instrument CE marking identifies the Notified
Body which has responsibility for surveillance of the
production.
Certificate IECEx Ex db [op is T6 Ga] IIC T6...T5 Ga/Gb (for
LLT100.XX.C to G – raised face pressure rated SS flange)
IECEx certificate number
IECEx FMG 16.0023X
The other marking refers to the protection type used according
to relevant EN/IEC standards:
– Ex db: Explosion protected by a flameproof enclosure
– [op is T6 Ga]: Optical Intrinsic safety used for equipment
protection level "a" for Gas atmosphere
– IIC: Gas group (all gas)
– 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
– Ga/Gb: Part of the LLT100 complies with equipment
protection level "a" (the process interface) and the remaining
of the LLT100 complies with equipment protection level "b"
for Gas atmosphere.
About the applications, this LLT100 can be used in Category
1G – Zone "0" (Gas) classified areas (continuous hazard)
with its "process part" only, whereas the remaining part of
the LLT100 (i.e. its enclosure) can be used in Category 2G
– Zone "1" (Gas), only. Reason for this is the process part of
the LLT100 (normally called front end) that provides inside
separation elements to seal off the electrical sensor from the
continuously hazardous process, according to the IEC 60079-
0, IEC 60079-26 and IEC 60079-1.
c) Certificate ATEX 2(1) D Ex tb [op is Da] IIIC T85°C...T100°C
Db IP66/IP67 (for LLT100.XX.A to G – All flanges except
Triclover)
FM Approvals certificate number
FM16ATEX0032X
48 User Guide | OI-LLT100-EN Rev. D
The meaning of ATEX code is as follows:
– II: Group for surface areas (other than mines)
– 2: Category (for instrument installed in Cat. 2/zone 21)
– (1): Category (for laser aiming in Cat. 1/zone 20)
– D: Dust (dangerous media)
– Ex tb: type of protection "tb" means protection by enclosure
– [op is Da]: optical intrinsic safety used for equipment
protection level "a" for dust atmosphere.
– IIIC: Metal Dust
– T100°C: Maximum surface temperature of the LLT100
enclosure with a Ta (ambient temperature) +85 °C for Dust
(not Gas) with a dust layer up to 50 mm depth.
– T85°C: Maximum surface temperature of the LLT100
enclosure with a Ta (ambient temperature) +75 °C for dust
– Db: Equipment protection level "b" for dust atmosphere
– IP66/IP67: degree of protection of the LLT100 acc. EN60529
NOTICE
The number indicated on the safety label close to
the instrument CE marking identifies the Notified
Body which has responsibility for surveillance of the
production.
Certificate IECEx Ex tb [op is Da] IIIC T85°C...T100°C Da IP66/
IP67 (for LLT100.XX.A to G – All Flanges except Tri-clover)
IECEx certificate number
IECEx FMG 16.0023X
The other marking refers to the protection type used according
to relevant EN/IEC standards:
– Ex tb: type of protection "tb" means protection by enclosure
– [op is Da]: Optical Intrinsic safety used for Equipment
protection level "a" for dust atmosphere
– IIIC: Dust (all types of dust)
– T100°C: Maximum surface temperature of the LLT100
enclosure with a Ta (ambient temperature) +85 °C for dust.
– T85°C: Maximum surface temperature of the LLT100
enclosure with a Ta (ambient temperature) +85 °C for dust.
– Db: Equipment protection level "b" for dust atmosphere
– IP66/IP67: degree of protection of the LLT100 acc. EN60529
Regarding dust application, the LLT100 is suitable for Category
2D – "Zone 21" according to the EN 60079-31.