Siemens SIPART Series Operating Instructions Manual page 281

EEPROM
EEPROM (Electrically Erasable Programmable Read-Only Memory; literally: elektrisch
löschbarer, programmierbarer Nur-Lese-Speicher in German) is a non-volatile electronic
memory. EEPROMs are often used when individual data bytes change over long time
periods and need to be saved in a manner protected against power failure, e.g. configuration
data or operating hours counters.
Electromagnetic compatibility
Definition as per the EMC law: EMC is the capability of a device to work satisfactorily in the
electromagnetic environment without causing electromagnetic interferences that are
unacceptable for other devices present in this environment.
Ex d protection
Type of protection for versions with flameproof enclosures. When the potentially explosive
mixtures enter the enclosure of a resource and an ignition source exists in the enclosure.
The transfer of the explosion inside the enclosure to the surrounding space must be ruled
out.
● d: flameproof enclosure
Ex ia/ib protection
Types of protection. If potentially explosive mixtures enter the enclosure of a resource, it
should not lead to ignition. Demarcation of sparks and increased temperatures.
● ia: intrinsic safety, as per special requirements compliant with EN 50020
● ib: intrinsic safety, as per EN 50020
Factory Mutual
Industrial property insurer and certification agency in the USA. FM Global is one of the
largest industrial insurers in the world who are specialized in the field of technically-
supported property insurance. It offers services like product research, testing and
certification.
Failure that causes a dangerous situation
Failure with the potential to switch a safety-instrumented system to a hazardous or non-
functioning safety status.
Fieldbus
A fieldbus is an industrial communication system used to connect a number of field devices
with a control device. Field devices include measuring sensors, final controlling elements
and actuators.
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11
Glossary
279