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FLOWSIC100 Flare-XT · Operating Instructions · 8023761/V1-0/2020-10 · © SICK Engineering GmbH
Installation Interface Unit
6.5.4
Requirements for installation in the Ex zone
General information
● The documentation for zone classification according to EN 60079-10 must be available.
● The devices to be used must be checked for suitability for the application area.
● After installation, an initial test of the device and the plant according to EN/
IEC 60079-17 must be performed.
WARNING:
Dangerous voltage
▸
Do not open the enclosure while energized.
▸
Only operate internal switches if the device is not live or the area is safe.
▸
Do not connect or disconnect the circuits unless the power has been turned
off or the area is safe.
▸
It must be ensured that the rated voltage U
M
60 V is not exceeded when
connected to devices not belonging to the system, in particular external
power supply devices, power supply units, etc.; except for the main power
supply with U
M
< 253 V.
▸
A suitable main power switch must be provided.
▸
Do not use the device when cables or terminals are damaged.
WARNING:
Ignition hazard through electrostatic discharge
The plastic display surface dimensions of the display door and of the display
exceed the allowable value for ignition group IIC. The user must take
appropriate precautions to avoid ignition hazards through electrostatic
discharge.
Ignition hazards through electrostatic discharges exist when gas flow meters
with special paintwork and a layer thickness >0.2 mm are used in applications
with ignition group IIC in accordance with ATEX and IECEx.
▸
For installation, the risk of electrostatic charging of the surface must be
reduced to a minimum.
Therefore, the device should not be installed in a location where the
external conditions are conducive to the build-up of electrostatic charge on
such surfaces. change previous text
▸
Use appropriate caution when performing maintenance and cleaning work.
For example, the surfaces should only be cleaned with a damp cloth. The
respective devices will be identified by the manufacturer with a warning
sign.
