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Glossary
EC low-voltage directive
The EC low voltage directive applies to electrical resources with rated voltages of:
● AC from 50 V to 1000 V;
● DC from 75 V to 1500 V.
EEPROM
Electrically Erasable Programmable Read Only Memory
EEPROMs are often used where individual bytes of data (e.g. configuration data or runtime
meters) change over time and must be stored safely in the event of a mains power failure.
EMC
Electromagnetic compatibility
Definition in accordance with EMC law
EMC is the capability of a device to operate satisfactorily in an electromagnetic environment
without itself emitting electromagnetic signals which interfere with other devices in that
environment.
EN
Europäische Norm - European standard
EU
European Community
Fail-safe
The capability of a control to maintain the safe state of the controlled device, e.g. machine,
process, or to bring the device to a safe state even when faults/failures occur.
Failure/Fault
Failure:
A resource is no longer capable of executing a required function.
Fault:
Undesired state of a resource indicated by the incapability of executing a required function.
Fault
Failure/Fault
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92
:
Operating Instructions, 06/2010, A5E00393069-03
SITRANS TH200/TH300
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