Installation
40 FLOWSIC600 · Operating Instructions · 8010458 V2.0 · © SICK MAIHAK GmbH
Requirements regarding cabling in hazardous areas (ATEX)
● The cables must fulfill the requirements set forth in EN 60079-14.
● Cables that are subject to exceptional thermal, mechanical, or chemical loads must be
specially protected (e.g. laid in open-ended conduits).
● Cables that are not installed fire proof must be fire retardant according to IEC 60332-1.
● Ferrules must be attached to the wire ends to ensure that they do not split up.
● The applicable requirements regarding air gaps and creepage distances must be
observed in accordance with EN 60079-7. The available air gaps and creepage
distances in the terminal box must not be reduced when connecting the cables.
● Unused cable glands must be replaced by the Exe plugs included in the delivery.
● The equipotential bonding must be in accordance with EN 60079-14.
● The meter body and SPU housing must be connected to the potential equalizer. In
intrinsically safe circuits, provide equipotential bonding along the wiring runs of the
current outputs.
● The applicable national specifications shall also be observed.
Operation of ultrasonic sensors in Zone 0
The ultrasonic transducers are suitable for the operation in Zone 0 at atmospheric
conditions, i.e. ambient temperature -20 °C to 60 °C and ambient pressure 0.8 bar to 1.1
bar(a). If ultrasonic transducers with titanium housing are to be used in Zone 0, it must be
assured that the medium does not transport solid parts (like dust or other particles) which
could cause an ignition hazard.
After installation and after every deinstallation and following reinstallation of the ultrasonic
transducers, the seal effect must be appropriately checked. During the operation the leak
tightness must be periodically checked and the sealing must be renewed if necessary.
After deinstallation and before every reinstallation the sealings must be renewed according
to the original assembly. Sealings can be ordered from SICK (provide article number and
serial number from type plate).
Terminal assignment
The terminal assignment in the SPU terminal box (see
→
Figure 12) is the same as for the
installation of the FLOWSIC600 in non-hazardous areas (see table in Section
→
3.4.5).
NOTICE:
The protective conductor must not be connected within the hazardous area.
For measurement reasons, the equipotential bonding must, as far as possible,
be identical to the pipeline potential or protective ground/earth. Additional
grounding with the protective conductor via the terminals is not permitted!
To Next Page
Loading...
Need help?
General
