Polyrack Tech-Group - Glossary from A to D

ABS

Abbreviation for acrylonitrile butadiene styrene.

AC

Abbreviation for ‘Alternating Current’.

ADC

Automatic (electronic) Daisy Chaining

ANSI

Abbreviation for “American National Standards Institute” (the equivalent of the German DIN). The ANSI is the American organization responsible for standardization, e.g. the codification of fonts for computers.

AT

Abbreviation for ‘Advanced Technology’. AT corresponds to a particular generation of circuit boards for personal computers. These are generally characterized by the 80286 processors from the Intel Corporation or by the 16-bit ISA extension bus. The ISA-Bus is also referred to as the AT-Bus for this reason.

ATX

ATX refers to a specific Intel mainboard layout. The ATX boards are characterized by short cables to the hard drive which allows for higher transfer rates, better ventilation of the CPU and the possibility of an automatic start of the computer.

CompactPCI

Abbreviation for “Compact Peripheral Component Interconnect Bus”. Compact PCI is a registered Trademark of the PCI Industrial Computer Manufacturers Group (PICMG). CompactPCI Systems are standardized microcomputers. The main advantage of CompactPCI lies in its Hot Swap capabilities.

Daisy Chain

A daisy chain is a group of hardware components that are connected in series. The first component is connected directly to the computer, and all other components are linked to each other in a chain.

Daisy Chaining

The connected components in a daisy chain can be allocated different priorities for the exchange of data, which is meant to prevent conflicts and malfunctions. The daisy chaining of a circuit board can be done either mechanically or electronically.

DC

Abbreviation for “direct current”: current of the same strength and direction

DIN

Abbreviation for “Deutsches Institut für Normung” (German Institute for Standardization): comparable to the American ANSI.

DIN 41494

DIN 41494 is the basic specification for the 19” construction systems. It is separated into different parts and defines the measurements for the individual components.

DIN 41612

DIN 41612 is the basic standard to printed circuit connectors. It defines the design and construction characteristics for connectors.

DIN 41617

DIN 41617 is the basic standard to printed circuit connectors. It defines the design and construction characteristics for connectors.

Double euroboard

The double euroboard is a circuit board according to a DIN standard. The card measures 100 x 233,35 mm. The reference "double euroboard" means that two cards can be inserted into the space one above the other.