BA11-F Mounting Box - Revision history

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2023-07-11T01:15:30Z

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2018-09-26T21:41:13Z

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Jnc: Link connector info

2018-09-20T22:06:44Z

Link connector info

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2018-09-20T00:43:13Z

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2018-09-19T02:08:28Z

move link

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2018-07-16T01:46:39Z

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2018-07-13T11:37:00Z

Length, per engineering drawing

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2018-07-13T11:26:16Z

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The '''BA11-F Mounting Box''' from [[Digital Equipment Corporation|DEC]] was primarily used in [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] to hold the [[Central Processing Unit|CPU]] and its programmer's console. BA11-F's were also occasionally used in 'expansion box' roles, to hold extra devices, in which case it had a blank front panel.

It held [[DEC card form factor|hex]] [[system unit]] [[backplane]]s, and could contain up to nine standard size (4-slot) system units, although typically the backplane used to hold the CPU was a 9-slot (for the -11/40) or larger.

It was one of the [[BA11 mounting boxes]], and was usually mounted in one of the [[H960 rack|H960]] series of 19"-wide racks produced by DEC. 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 21" tall (nominally - see below) BA11-F was designed for these spaces. Slides allowed it to be slid forward for maintenance, etc.

The system units were mounted vertically, facing sideways (unlike the later [[BA11-K mounting box]], where they faced up); they were always mounted with the [[DEC card form factor|A-row connectors]] at the backtop near the power distribution panel. A row of cooling fans mounted on the top, and in all later models, bottom, passed air over the boards.

The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s.

The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 26-1/2" deep.  It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".

← Older revision		Revision as of 01:15, 11 July 2023
Line 11:		Line 11:
	The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".		The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".

−	[[Category: DEC ~~Hardware~~]]	+	[[Category: DEC Mounting Boxes]]

@@ Line 7: / Line 7: @@
 The system units were mounted vertically, facing sideways (unlike the later [[BA11-K mounting box]], where they faced up); they were always mounted with the [[DEC edge connector contact identification|A-row connectors]] at the backtop near the power distribution panel. A row of cooling fans mounted on the top, and in all later models, bottom, passed air over the boards.
-The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[power harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s; the harness ended in a power distribution panel containing standard [[DEC power distribution connectors]].
+The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; 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]].
 The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".
 [[Category: DEC Hardware]]

@@ Line 7: / Line 7: @@
 The system units were mounted vertically, facing sideways (unlike the later [[BA11-K mounting box]], where they faced up); they were always mounted with the [[DEC edge connector contact identification|A-row connectors]] at the backtop near the power distribution panel. A row of cooling fans mounted on the top, and in all later models, bottom, passed air over the boards.
-The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[power harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s.
+The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[power harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s; the harness ended in a power distribution panel containing standard [[DEC power distribution connectors]].
 The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".
 [[Category: DEC Hardware]]

← Older revision		Revision as of 00:43, 20 September 2018
Line 11:		Line 11:
	The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".		The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".

−	[[Category: ~~PDP-11s~~]]	+	[[Category: DEC Hardware]]

@@ Line 7: / Line 7: @@
 The system units were mounted vertically, facing sideways (unlike the later [[BA11-K mounting box]], where they faced up); they were always mounted with the [[DEC edge connector contact identification|A-row connectors]] at the backtop near the power distribution panel. A row of cooling fans mounted on the top, and in all later models, bottom, passed air over the boards.
-The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s.
+The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[power harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s.
 The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".

← Older revision		Revision as of 11:37, 13 July 2018
Line 9:		Line 9:
	The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s.		The BA11-F came with the [[H742 Power Supply]], which was a separate unit, permanently mounted directly to the H960, next to the BA11-F; a [[harness]] connected to the two. The [[power supply]] contained up to five [[DEC standard modular regulator]]s.

−	The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and ~~26-1/2~~" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".	+	The BA11-F's dimensions were 21" high, 17-1/8" wide (including the power supply), and 24" deep. <!-- and weighed 87 lbs (without and backplanes or boards)--> It was usually supplied with a vertical extension on the front, which increased the rack space usage to 31-1/2".