Siemens SIPART PS2 6DR50xx Instrucciones de operaciones Pagina 233

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 242
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 232
Glossary
SIPART PS2 with and without HART communications
Operating Instructions, 09/2007, A5E00074631-07
233
Digital
Representation of a variable in the form of characters or numbers. The functional course of
an originally changeable analog variable is simulated in predefined stages. Predefined
values are assigned to these stages. Opposite to "analog".
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 power fail-safe manner. e.g. configuration data or runtime
meters.
EEx 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
EEx-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
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.
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.
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.
Vista de pagina 232
1 2 ... 228 229 230 231 232 233 234 235 236 237 238 ... 241 242

Comentarios a estos manuales

Sin comentarios