I have found a few references for "blackplane board" - 59 or fewer, associated with HP and Compaq - as in a model. However, "digging deeper", the expression does not appear, but backplane board.
And backplane board is tarjeta principal de conexión / tarjeta madre posterior.

Computer Trade Exchange Inventory
HP, A1703-60087, HP A1703-60087 BLACKPLANE BOARD A1703-69087, 1, $225.00. HP, A1703-63008, SCSI CABLE (RL), Call, $Call ...
www.computertradeexchange.com/inventory/HPC.html - 99k - Cached - Similar pages
Austin Texas - Paramount Computer Corporation - Storage Products
D5989-63010, D5989-63010 - HOT SWAP BLACKPLANE BOARD FOR RS/12 - http:/ D5989-63010 - HOT SWAP BLACKPLANE BOARD FOR RS/12, 10, $85 ...
www.pmount.com/prod_show.asp?ss=STOR - 216k - Cached - Similar pages
[PDF]
ISTOR ESR 212/316 Installation Manual
File Format: PDF/Adobe Acrobat - View as HTML
Serial ATA blackplane board supports four hot-swap Serial ATA or Serial Attached SCSI hard disk. drive. The following diagram overviews the board layout and ...
www.tstcom.com/downloads/manuals/istor.pdf - Similar pages

no tengas tanta prisa en cerrar la pregunta... :)

mira en http://www.websters-online-dictionary.org/definition/backpla...

IPSE (an IPSE is the integration of the following aspects:upper-CASE, framework, framework integration, I-CASE, integrated computer aided software engineering tools, integrated project support environment, IPSE, lower-CASE, project management and configuration management in a multi-user environment, software backplane, workbench), entorno integrado de soporte de proyectos (an IPSE is the integration of the following aspects:upper-CASE, framework, framework integration, I-CASE, integrated computer aided software engineering tools, integrated project support environment, IPSE, lower-CASE, project management and configuration management in a multi-user environment, software backplane, workbench). (various references)

saludos...