Ex p Control Unit
SIEMENS Set
Safety
Rev. 0
01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx
Page 13 of 80
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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.
Avoidance of damage to property
Short circuit due to improper connection
An incorrect connection of the power supply will destroy the electronics and void
the warranty.
Triggering the safety function
Switching on again too quickly after switching off can cause internal voltage
peaks in the power supply unit and thus trigger a safety function. After switching
off the voltage path, wait at least 30 seconds before switching on again.
EMC-compliant connection
For the safe function of the Ex p control unit it is important to carry out the wiring
in accordance with EMC. This includes observing the chapter Electrical
connections with regard to EMC-compliant wiring and inductive loads.
Storage at an excessively high temperature
Store the Ex p control unit at the intended storage temperature since otherwise
damage to the electronics or seals may occur. Ensure adequate air conditioning
at high storage temperatures.
