BA11-P card cage

The BA11-P card cage from DEC was used in PDP-11/60 to hold the CPU, main memory and device controllers.

It held hex system unit backplanes, and could contain up to roughly seven standard size (4-slot) system units (the documentation formally specifies six), although the backplane used to hold the CPU was a 14-slot (for the -11/60) unit.

It was one of the BA11 mounting boxes. It was mounted in an H9500 double-width low-boy corporate cabinet produced by DEC. The backplanes were mounted vertically, facing forward (like those in the later VAX-11/780.

The BA11-P used one (optionally two) H7420 Power Supplies, which were separate units, permanently mounted directly in the H9500, below and behind the BA11-P; a power harness connected to the two. The power supply contained up to five DEC standard modular regulators; the harness ended in a power distribution panel containing standard DEC power distribution connectors.

External links

• PDP-11/60 cabinet and power supply manual - the BA11-P is covered on pg. 4-7 (pg. 90 of the scanned version) through 4-18