Siemens 6DR50 Series Operating Instructions Manual page 286

Glossary
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 temperature transmitters, pressure transmitters,
and positioners.
Fieldbus Foundation
Syndicate of manufacturers of measurement and control systems. The syndicate develops
the open fieldbus specifications of the FOUNDATION Fieldbus.
Final controlling element
Converter that converts electric signals into mechanical or other non-electric variables.
Firmware
Firmware (FW) is the software embedded in a chip in electronic devices. It is not like
software that is stored on hard disks, CD-ROMs or other mediums. These days, the firmware
is mostly stored in a flash memory or an EEPROM. Firmware is software in the hardware,
and is thus an intermediate between the software and the hardware. Firmware is normally
model-specific. This means that it does not function on other device models and is delivered
by the manufacturing company. The corresponding devices cannot function without the
firmware. The firmware mostly contains elementary functions to control the device, as well as
input and output routines.
FOUNDATION Fieldbus
Fieldbus to connect sensors and final control elements in hazardous areas in accordance
with IEC 61158-2. The FOUNDATION Fieldbus uses a common 2-wire cable for data
communication and power supply. Data communication and power supply. The
FOUNDATION Fieldbus uses bus types such as High Speed Ethernet and Foundation H1.
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SIPART PS2 with and without HART
Operating Instructions, 09/2014, A5E00074631-12