DIN 41612

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DIN 41612 was a DIN standard for electrical connectors that are widely used in rack based electrical systems. Standardisation of the connectors is a pre-requisite for open systems, where users expect components from different suppliers to operate together. The most widely known use of DIN 41612 connectors is in the VMEbus and NuBus systems. The standard has withdrawn in favor of international standards IEC 60603-2 and EN 60603-2. DIN 41612 connectors are used in Pancon, STEbus, Futurebus, VMEbus, Multibus II, NuBus, Acorn Archimedes expansion bus, VXI Bus, eurocard TRAM motherboards, and Europe Card Bus, all of which typically use male DIN 41612 connectors on Eurocards plugged into female DIN 41612 on the backplane in a 19-inch rack chassis. To support the plug-in card/backplane configuration, the "normal" versions of these connectors have right-angle PCB mounting pins on the male DIN 41612 connector and straight PCB mounting pins on the female DIN 41612 connector. There also exist "reversed" connectors, in which the male DIN 41612 connector has straight mounting pins and the female DIN 41612 connector has right-angle mounting pins. The pin numbering of the connectors is such that, if a "normal" connector is replaced with a "reversed" connector, the row ordering and the pin numbering is unchanged: what was male pin a1 is now female receptacle a1. As a result, if two boards are designed to connect edge-to-edge with no backplane, one board would require a "normal" connector (male with right-angle pins) and the other would require a "reversed" connector (female with right-angle pins). In this arrangement, the row ordering is unchanged but the pin ordering is mirrored: male pin a1 is connected to female receptacle a32.