46 FLOWSIC500 · Operating Instructions · 8025733/1GMJ/V4-2/2022-07 · © SICK Engineering GmbH
Installation
Subject to change without notice
3.4 Electrical installation
3.4.1 Requirements for use in potentially explosive atmospheres
The FLOWSIC500 is suitable for measuring combustible and occasionally ignitable gases
corresponding to zones 1 and 2.
Basic requirements
▸
The documentation for zone categorization in accordance with IEC60079-10 must be
available
▸
The FLOWSIC500 must have been checked for suitability for the actual installation
location and the Ex marking on the device must match the requirements.
▸
After installation and before initial commissioning, the complete equipment and the
system must be inspected in compliance with IEC 60079-17.
The FLOWSIC500 is suitable for use in potentially explosive atmospheres:
ATEX: II 2G Ex ia [ia] IIB T4 Gb, II 2G Ex ia [ia] IIC T4 Gb, II 2G Ex op is IIC T4 Gb
IECEx: Ex ia [ia] IIB T4 Gb, Ex ia [ia] IIC T4 Gb, Ex op is IIC T4 Gb
US/C: Class I Division 1, Groups C, D T4, Ex/AEx ia IIB T4 Ga
For a FLOWSIC500 used in potentially explosive atmospheres:
▸
Installation, commissioning, maintenance and inspection may only be
carried out by skilled persons having knowledge of the relevant rules and
regulations for potentially explosive atmospheres, especially:
– Ignition protection types
– Installation regulations
– Category classification
▸
Comply with all valid IEC standards.
WARNING: Risk of explosion
All electrical connections of the FLOWSIC500 are approved for connection to
the certified intrinsically safe power circuits only.
▸
Proof of the intrinsic safety in compliance with IEC 60079-14 must be
presented for interconnection with the associated intrinsically safe
equipment.
Otherwise the intrinsic safety of the FLOWSIC500 can be endangered, i.e.
the ignition protection for the FLOWSIC500 can no longer be ensured.
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