Difference between revisions of "BA11-L mounting box"
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| − | The '''BA11-L mounting box''' was for many years a 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]]. | + | The '''BA11-L mounting box''' was for many years a 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]]. |
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 5-1/4" tall BA11-L mounting box was designed for these spaces, and could contain up to 2 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 5-1/4" tall BA11-L mounting box was designed for these spaces, and could contain up to 2 standard size (4-slot) system units. | ||
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BA11-L'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 [[Central Processing Unit|CPU]], and had a front panel of some sort - either a programmer's console, or an operator's console. | BA11-L'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 [[Central Processing Unit|CPU]], and had a front panel of some sort - either a programmer's console, or an operator's console. | ||
| − | In the [[PDP-11/04]] (the model which used this mounting box to hold the CPU, although the [[PDP-11/34]] was occasionally seen in one) the front panels were the [[KY11-LA Operator's Console]] and the [[KY11-LB Programmer's Console]] (the same for both CPU's). | + | In the [[PDP-11/04]] (the model which used this mounting box to hold the CPU, although the [[PDP-11/34]] was occasionally seen in one) the front panels were the [[KY11-LA Operator's Console]] and the [[KY11-LB Programmer's Console]] (the same for both CPU's). The [[PDP-11/24]] was also available in a BA11-L, with an -11/24-specific front panel. |
| − | The system units were mounted longitudinally, facing sideways; they were generally mounted with the [[DEC | + | The system units (often a single 9-slot, although two 4-slots were also possible] were mounted longitudinally, facing sideways; they were generally mounted with the [[DEC edge connector contact identification|A-row connectors]] at the back, next to the power distribution panel. |
| − | The BA11-L came with the [[H777 Power Supply]], which came in several versions, with different mixes of voltages supplied. The supply was a separate unit, also mounted longitudinally in the box, at the side. | + | The BA11-L came with the [[H777 Power Supply]], which came in several versions, with different mixes of voltages supplied. The supply was a separate unit, also mounted longitudinally in the box, at the side. The supply included a power distribution panel containing standard [[DEC power distribution connectors]]. |
| + | |||
| + | A single cooling fan was mounted at the front of the box, to provide air-flow to the boards; the power supply had its own internal fan, at the front. | ||
The BA11-L's dimensions were 5-1/4" high, 19" wide, and 25" deep; it weighed 45 lbs (without the backplanes or boards). | The BA11-L's dimensions were 5-1/4" high, 19" wide, and 25" deep; it weighed 45 lbs (without the backplanes or boards). | ||
| + | |||
| + | ==See also== | ||
| + | |||
| + | * [[DD11-C backplane]] | ||
| + | * [[DD11-D backplane]] | ||
| + | |||
| + | ==External links== | ||
| + | |||
| + | * [http://bitsavers.org/pdf/dec/unibus/EK-BA11L-TM-001_Oct77.pdf BA11-L mounting box technical manual] (EK-BA11L-TM-001) | ||
| + | * [http://bitsavers.org/pdf/dec/pdp11/1104/MP00019_1104_EngrDrws_Feb78.pdf 11/04 Engineering Drawings] - BA11-L Field Maintenance Print Set (MP00018) is on pp. 100-142 | ||
| + | |||
| + | [[Category: DEC Mounting Boxes]] | ||
Latest revision as of 02:20, 11 July 2023
The BA11-L mounting box was for many years a standard hex system unit backplane mounting box for the H960 series of 19"-wide racks produced by DEC, one of the BA11 mounting boxes.
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 5-1/4" tall BA11-L mounting box was designed for these spaces, and could contain up to 2 standard size (4-slot) system units.
BA11-L'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 (the model which used this mounting box to hold the CPU, although the PDP-11/34 was occasionally seen in one) the front panels were the KY11-LA Operator's Console and the KY11-LB Programmer's Console (the same for both CPU's). The PDP-11/24 was also available in a BA11-L, with an -11/24-specific front panel.
The system units (often a single 9-slot, although two 4-slots were also possible] were mounted longitudinally, facing sideways; they were generally mounted with the A-row connectors at the back, next to the power distribution panel.
The BA11-L came with the H777 Power Supply, which came in several versions, with different mixes of voltages supplied. The supply was a separate unit, also mounted longitudinally in the box, at the side. The supply included a power distribution panel containing standard DEC power distribution connectors.
A single cooling fan was mounted at the front of the box, to provide air-flow to the boards; the power supply had its own internal fan, at the front.
The BA11-L's dimensions were 5-1/4" high, 19" wide, and 25" deep; it weighed 45 lbs (without the backplanes or boards).
See also
External links
- BA11-L mounting box technical manual (EK-BA11L-TM-001)
- 11/04 Engineering Drawings - BA11-L Field Maintenance Print Set (MP00018) is on pp. 100-142
