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backplane (BP)

Backplane (BP) refers to a backplane of a rack in which computing equipment, servers, systems or industrial computers are housed. Different modules with their many interfaces, ports and buses can be connected and configured via such a backplane. Backplanes are used in communications technology, especially for large hubs, routers, switches or blade servers.

A backplane implements the logical and physical interconnection of plug-in boards, single- board computers, carrier boards or functional boards or other functional units to form an overall system. The backplane must provide a bandwidth from the transmission capacity that corresponds to the sum of all port bandwidths. For example, if a Fast Ethernet article has ArticleID="16" ArticleURL="Ethernet-Switch-Ethernet- switch" ArticleTitle="Ethernet-Switch"> Ethernet switch 10 ports, this results in a bandwidth for the backplane of 1 Gbps. Typical bus systems for backplanes are the VME bus, PCI bus, Compact PCI, etc. In addition to the technologies mentioned, there are various high-speed variants of 10 Gigabit Ethernet, 40 Gigabit Ethernet and 100 Gigabit Ethernet with data rates of up to 100 Gbit/s with backplane Ethernet.

CompactPCI backplane, photo: Schroff

CompactPCI backplane, photo: Schroff

A backplane can be divided into several different bus systems under application aspects. The most complex solution is to provide a separate backplane for each implemented technology. For servers, the backplane distributes the diverse incoming service requests among the set of application and file servers.

The different bus technologies from the processor bus to the LAN

The different bus technologies from the processor bus to the LAN

In a passive backplane concept, the individual components are interconnected by a completely passive bus. There are no active components on the backplane. This design approach has the advantage that the backplane ensures a high level of fail-safety. The passive backplane is controlled by a separate controller module. The interfaces of a backplane to the subrack are described in the IEC 60297standard.

Informations:
Englisch: backplane - BP
Updated at: 12.06.2018
#Words: 290
Links: rack, vertical interconnect access (PCB) (via), blade, plug-in, board
Translations: DE
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