CompactPCI form factor
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Model 6276 User Guide
3 • System architecture
CompactPCI form factor
CompactPCI is flexible in the mechanical and connector area, using a passive backplane and plug-in daughter-
boards. The architecture is based on the IEC 1101.10 and 1101.11 Eurocard standard for the fixed 160mm
depth (for front boards), but allows for two board heights:
•
3U—100 mm high
•
2U—233.35 mm high
This variety enables a wider variety of applications and industries. 3U, which is the minimum for CompactPCI
as it accommodates the full 64-bit CompactPCI bus, is popular for embedded industrial automation applica-
tions, while 2U provides additional board real estate for more complex applications. 2U also provides more
connectors for rear-panel I/O often needed in telecom products.
Eurocard boards offer a long list of advantages:
•
Extensive board keying capabilities so that boards can only be plugged into appropriate slots
•
Card guides for solid rear backplane connectors alignment
•
Injector/ejector handles
•
EMC compliance that minimizes electromagnetic interference
CompactPCI boards are inserted at the front of the chassis—which provides maximum configuration flexibil-
ity—with options for I/O connections to either the front and/or rear of the card. The cards are firmly held in
position by their connector, card guides on both sides, and a face plate which solidly screws into the card cage.
