Ex p Control Unit
SIEMENS Set
Maintenance and care
Rev. 0
01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx
Page 65 of 80
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Visual inspection
Perform a visual inspection monthly by:
Checking the enclosure, cable entries and cables for damage.
Checking the screwed connections for tight fit.
Checking the error memory for content.
Cleaning
No solvents should be used to clean the control unit as these can impair the
properties on contact with the seals.
Regular maintenance
Depending on the purity of purge air used, the inlet and outlet of the control unit
must be checked regularly for impurities (e.g. oil, dust, etc.) or corrosion.
In the case of anomalies, the operator should weigh up the possibility of a timely
and proper cleaning by BARTEC GmbH against a spontaneous failure of the
control unit.
Furthermore, the function of the overall system should be checked. The correct
sequence of the purge phase and of the operating phase should be checked.
Repairs
Repairs on explosion-protected equipment may be done only by authorized
persons working in accordance with the latest development in technology
and using original spare parts. The applicable provisions must be
observed.
Repairs must be carried out in accordance with EN / IEC 60079-19.
For SIL-qualified devices, only a corresponding electronics module with
SIL qualification may be used.
All application settings must be re-entered. Therefore, you must conduct a
restart after a repair. If you have saved the data of parameter assignment
the first time you commissioned the Ex p control unit, you can transfer
them back to the replacement control unit. Detailed information on the
replacement of spare parts can be found in these operating instructions.
After restart or transfer of the parameter assignment data, you must verify
the parameters. Only then will the device be ready for operation again.
For Ex applications, only one device and one electronic module may be
used with corresponding Ex approval. Order the spare parts from your local
representative. The serial number can be found on the type plate of the
device, inside the enclosure.
