Difference between revisions of "BA11-K mounting box"
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| − | The '''BA11-K mounting box''' was for many years the standard [[DEC card form factor|hex]] [[system unit]] [[backplane]] mounting box for the [[H960 rack|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation|DEC]], the [[BA11 mounting boxes]]. It could contain up to 5 standard size (4-slot) system units. | + | The '''BA11-K mounting box''' was for many years the standard [[DEC card form factor|hex]] [[system unit]] [[backplane]] mounting box for the [[H960 rack|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation|DEC]], one of the [[BA11 mounting boxes]]. It could contain up to 5 standard size (4-slot) system units. |
The H960 racks 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-K mounting box was designed for these spaces. | The H960 racks 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-K mounting box was designed for these spaces. | ||
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The system units were mounted longitudinally, facing upward (unlike the [[BA11 mounting box]], where they had been facing down); they were generally mounted with the [[DEC card form factor|A-row connectors]] at the back, next to the power distribution panel. | The system units were mounted longitudinally, facing upward (unlike the [[BA11 mounting box]], where they had been facing down); they were generally mounted with the [[DEC card form factor|A-row connectors]] at the back, next to the power distribution panel. | ||
| − | The BA11-K came with the [[H765 Power | + | The BA11-K came with the [[H765 Power System]]. It was a separate unit, mounted transversely at the rear of the box. It contained up to four [[DEC standard modular regulator]]s. Cooling fans mounted on the front face of the H765 passed air both over the boards, and then through the power supplies. |
The BA11-K's dimensions were 10-1/2" high, 17-1/8" wide, and 17-1/4" deep without the power supply; with the H765 added, it was 26-1/2" deep, and weighed 87 lbs (without and backplanes or boards). | The BA11-K's dimensions were 10-1/2" high, 17-1/8" wide, and 17-1/4" deep without the power supply; with the H765 added, it was 26-1/2" deep, and weighed 87 lbs (without and backplanes or boards). | ||
Revision as of 14:18, 12 July 2018
The BA11-K mounting box was for many years the standard hex system unit backplane mounting box for the H960 series of 19"-wide racks produced by DEC, one of the BA11 mounting boxes. It could contain up to 5 standard size (4-slot) system units.
The H960 racks 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-K mounting box was designed for these spaces.
BA11-K's were used in both 'basic box' and 'expansion box' roles. The latter was used to hold extra devices, and had a blank front panel. The former contained the CPU, and had a front panel of some sort - either a programmer's console, or an operator's console.
In the PDP-11/04 and PDP-11/34 (the models which used this mounting box to hold the CPU) the front panels were the KY11-LA Operator's Console and the KY11-LB Programmer's Console (the same for both CPU's).
The system units were mounted longitudinally, facing upward (unlike the BA11 mounting box, where they had been facing down); they were generally mounted with the A-row connectors at the back, next to the power distribution panel.
The BA11-K came with the H765 Power System. It was a separate unit, mounted transversely at the rear of the box. It contained up to four DEC standard modular regulators. Cooling fans mounted on the front face of the H765 passed air both over the boards, and then through the power supplies.
The BA11-K's dimensions were 10-1/2" high, 17-1/8" wide, and 17-1/4" deep without the power supply; with the H765 added, it was 26-1/2" deep, and weighed 87 lbs (without and backplanes or boards).
