Difference between revisions of "BA11-D Mounting Box"
(A good start) |
(typos, copyedit) |
||
| Line 1: | Line 1: | ||
| − | The '''BA11-D mounting box''' was an early standard [[DEC card form factor|hex]] [[system unit]] [[backplane]] mounting box. One of the [[BA11 mounting boxes]], they were used to hold mid-series [[PDP-11/05]]'s and early [[PDP-11/40]]'s. | + | The '''BA11-D mounting box''' was an early standard [[DEC card form factor|hex]] [[system unit]] [[backplane]] [[mounting box]]. One of the [[BA11 mounting boxes]], they were used to hold mid-series [[PDP-11/05]]'s and early [[PDP-11/40]]'s. |
They were principally mounted in the [[H960 rack|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation|DEC]]. Those provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11-D mounting box was designed for these spaces, and could contain up to 5 standard size (4-slot) system units. | They were principally mounted in the [[H960 rack|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation|DEC]]. Those provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11-D mounting box was designed for these spaces, and could contain up to 5 standard size (4-slot) system units. | ||
| Line 5: | Line 5: | ||
BA11-D's were principally used in 'basic box' roles, not as expansion boxes. The former contained the [[Central Processing Unit|CPU]], and had a front panel. | BA11-D's were principally used in 'basic box' roles, not as expansion boxes. The former contained the [[Central Processing Unit|CPU]], and had a front panel. | ||
| − | The BA11-D came with the [[H750 Power Supply]]; it was a separate unit, | + | The BA11-D came with the [[H750 Power Supply]]; it was a separate unit, mounted longitudinally in the box, at the right-hand side. It contained two [[transformer]]s, and a [[printed circuit board|PCB]] which supplied +15V (1A) and -15V (8A), and some +5V (20A); an [[H744 +5V Regulator]] provided the balance (20A). |
| − | The power distribution panel (which contained the older 9-pin versions of the standard [[DEC power distribution connectors]]) was at the | + | The power distribution panel (which contained the older 9-pin versions of the standard [[DEC power distribution connectors]]) was at the front. A BC05T (110V input) or BC05U (220V) line set controlled the main [[alternating current|AC]] input power. |
| − | The system units were mounted longitudinally, facing up; they were generally mounted with the [[DEC edge connector contact identification|A-row connectors]] at the back. | + | The system units were also mounted longitudinally, facing up; they were generally mounted with the [[DEC edge connector contact identification|A-row connectors]] at the back. |
| − | A pair of cooling fans was mounted at the front of the box, to provide air-flow to the boards; the power supply had its own internal fan, also at the front. | + | It had a pair of connections to the standard DEC [[Remote Switching Control Bus]], so it could turn other units off and on with its power switch. A pair of cooling fans was mounted at the front of the box, to provide air-flow to the boards; the power supply had its own internal fan, also at the front. |
The BA11-D's dimensions were 10-1/2" high, 19" wide, and 23" deep. <!-- it weighed 45 lbs (without the backplanes or boards). --> | The BA11-D's dimensions were 10-1/2" high, 19" wide, and 23" deep. <!-- it weighed 45 lbs (without the backplanes or boards). --> | ||
[[Category: DEC Hardware]] | [[Category: DEC Hardware]] | ||
Revision as of 13:08, 29 September 2018
The BA11-D mounting box was an early standard hex system unit backplane mounting box. One of the BA11 mounting boxes, they were used to hold mid-series PDP-11/05's and early PDP-11/40's.
They were principally mounted in the H960 series of 19"-wide racks produced by DEC. Those provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The 10-1/2" tall BA11-D mounting box was designed for these spaces, and could contain up to 5 standard size (4-slot) system units.
BA11-D's were principally used in 'basic box' roles, not as expansion boxes. The former contained the CPU, and had a front panel.
The BA11-D came with the H750 Power Supply; it was a separate unit, mounted longitudinally in the box, at the right-hand side. It contained two transformers, and a PCB which supplied +15V (1A) and -15V (8A), and some +5V (20A); an H744 +5V Regulator provided the balance (20A).
The power distribution panel (which contained the older 9-pin versions of the standard DEC power distribution connectors) was at the front. A BC05T (110V input) or BC05U (220V) line set controlled the main AC input power.
The system units were also mounted longitudinally, facing up; they were generally mounted with the A-row connectors at the back.
It had a pair of connections to the standard DEC Remote Switching Control Bus, so it could turn other units off and on with its power switch. A pair of cooling fans was mounted at the front of the box, to provide air-flow to the boards; the power supply had its own internal fan, also at the front.
The BA11-D's dimensions were 10-1/2" high, 19" wide, and 23" deep.
