ABB TZIDC Manual page 32

32 TZIDC DIGITAL POSITIONER | DS/TZIDC-EN REV. G
—
... Use in potentially explosive atmospheres
... cFMus
The following conditions have to be observed
(incomplete):
• Assembly and maintenance to be done only if
atmosphere is Ex-free and a permit for hot works is in
place.
• The TZIDC is only to be operated in a fully mounted
and intact enclosure.
• Outside of the housing is a connector for the
equipotential bonding.
The following opportunities are available:
– Direct connection of single-strand wires of up to
2
2.5 mm or
– Direct connection of fine wires of up to 1.5 mm
– Connection of cross-sections of up to 6 mm
a ring or spade terminal with 4 mm drill hole.
• For proper selection of cables see electrical
installation instructions in the original manufacturer's
manual. Use cables rated at least 20 K greater than the
ambient temperature.
• High / recurring charging processes in gas areas must
be excluded by the operator.
Notes for operation
• The positioner shall be included in the local equipotential
bonding system
• Either only intrinsically or non intrinsically safe circuits
shall be connected. A combination is not permitted.
• When the Positioner is operated with non intrinsically safe
circuits, the subsequent use for type of protection
Intrinsic Safety is not permitted.
Special conditions for the safe use of intrinsically safe
positioners
Special conditions
• The 'Local communication interface (LCI)' may only be
used outside of the explosion hazardous area with
U ≤ 30 V DC.
m
• Measures of lightning protection have to be provided by
the user.
Special conditions for safe use of Positioners non I.S.
• Only devices which are suitable for the operation in
explosion hazardous areas declared as zone 2 and the
2
or
conditions available at the place of operation are allowed
2
using
to be connected to circuits in the zone 2.
• The connecting and disconnecting as well as the
switching of circuits under voltage are only permitted
during installation, for maintenance or repair purposes.
Note
The temporal coincidence of explosion hazardous
atmosphere and installation, maintenance resp. repair
purposes is assessed as improbably.
• For the circuit 'Position feedback with proximity switches
or microswitches' measures have to be taken outside the
device that the rated voltage is exceeded not more than
40 % by transient disturbances.
• Only non combustible gases are allowed to be used as
pneumatic auxiliary energy.
• Only suitable cable entries which meet the requirements
of IEC 60079-15 are allowed to be used.
Use, operation
The TZIDC is only approved for intended and appropriate use.
In case of non-compliance, the warranty and manufacturer's
liability do no longer apply!
• In explosive atmospheres only such auxiliary components
shall be used that meet all requirements of the European
and the national standards.
• The ambient conditions specified in the instruction
manual have to be adhered to strictly.
• The TZIDC has only been approved for its appropriate and
intended use in standard industrial atmospheres. Where
aggressive substances are present in the air, the
manufacturer has to be consulted.