C.3 Linking Device Usage
The Linking Device is only approved for intended and appropriate use. In case of
non-compliance, the warranty and manufacturer's liability does not apply.
• The auxiliary components that meet all requirements of European and national
directives and legislation can be used in potentially explosive atmospheres.
• The environmental conditions specified in the manual must be followed strictly.
• The Linking Device is not used in systems where cathodic systems for corrosion
protection are in place. Although special precautions may make that possible
(additional earthing bridges), the manufacturer must be consulted in each case.
• The operator must provide measures for protection against lightning.
• The maximum surface temperatures depend on the circumstances of installing the
equipment, and the customer or operator is responsible for those. During intended
operation no temperature increases of > 20 K are to be reached at the outside parts
of the enclosure. Thus, temperature T4 is maintained.
• All outside parts are made from suitable low-sparking materials. However, the
operator must inspect any ignition hazards that may be caused by sparks when
operating the entire machine. Parts containing light metal alloys have to be installed
in a way that they are protected against external impact.
• In explosion group IIC and Zone 2 no projected plastic surfaces >20 cm³ are allowed;
in IIB or dust-Ex, 100 cm² may be reached.
• Dust settlements must be removed regularly.
• The company installing the device must ensure that the transient characteristic is
limited to 40 % above the service voltage.
• Icing is not permitted.
C.4 Maintenance and Repair
Definition of terms according to IEC 60079-17:
Maintenance: defines a combination of any actions carried out to retain an item in, or
restore it to, conditions in that it is able to meet the requirements of the relevant
specification and perform its required functions.
Inspection: defines any action comprising careful scrutiny of an item carried out either
without dismantling, or with the addition of partial dismantling as required, supplemented
by means such as measurement, in order to arrive at reliable conclusion as to the
condition of an item.
2PAA114135-610 116
C Linking Device for Zone 2 Explosion and Protection Environment
C.3 Linking Device Usage
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