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Glossary
Makrolon
Glass-fiber reinforced polycarbonate (PC).
Microcontroller
Microcontrollers (also µController, µC, MCU) are single-chip computer systems in which
almost all components such as master processor, program memory, working memory and
input/output interfaces are included in a single chip.
NAMUR
Standardization association for measurement and control in chemical industries. NAMUR is
an association of users of process control technology. The members are mainly the
companies from German-speaking countries. The association was formed in Leverkusen in
1949.
NEMA
National Electrical Manufacturers Association. NEMA is a standardization institute in the
USA. NEMA was formed in 1926 with the merger of Associated Manufacturers of Electrical
Supplies and the Electric Power Club.
NEMA 4
An enclosure standard of the National Electrical Manufacturers Association. The NEMA 4
compliant devices are suitable for use in indoor and outdoor applications. Protection is
provided against dust particles, rain as well as spray and splash water.
NEMA 4x
The same protection like NEMA 4. Additional protection of the enclosure from corrosion.
Parameter assignment
Individual parameter settings are specifically changed to adjust the positioner as per the
actuator or other requirements. Parameter assignment is carried out after the complete
commissioning of the positioner.
Piezoelectric effect
Name of a physical phenomenon. Due to mechanical compression loads on a crystal, an
electric potential develops on specific crystal surfaces. In a reverse case, applying an electric
field to specific crystal surfaces leads to crystal deformation.
Potentially explosive gaseous atmosphere
Mixture of air, combustible gases, fluff, fibers or dusts.
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SIPART PS2 with and without HART
Operating Instructions, 09/2014, A5E00074631-12
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