BA11-S mounting box - Revision history

Jnc: /* Further reading */ +Expanding into a BA11-SA Box

2024-08-01T19:06:10Z

‎Further reading: +Expanding into a BA11-SA Box

Jnc: +New category

2024-07-26T15:11:29Z

+New category

Jnc: New cat

2023-07-11T01:22:44Z

New cat

Jnc: +See also, +doc

2023-07-09T03:59:35Z

+See also, +doc

Jnc: link backplane

2022-07-05T01:39:22Z

link backplane

Jnc: start page for H786; →‎External links: +manuals, FMPS

2022-07-05T01:05:04Z

start page for H786; →‎External links: +manuals, FMPS

Jnc: avoid redir

2019-11-16T15:57:56Z

avoid redir

Jnc: +cat

2018-09-20T00:52:25Z

+cat

Jnc: Clarity, typo

2018-07-17T00:41:08Z

Clarity, typo

Jnc: A good start

2018-07-17T00:30:18Z

A good start

New page

The '''BA11-S mounting box''' was a [[QBUS]] [[PDP-11]] [[mounting box]] from [[Digital Equipment Corporation|DEC]]; effectively a [[QBUS#Variable_address_size|Q22]] variant of the earlier [[BA11-N mounting box]]. The manual says the BA11-S was for [[PDP-11/23B]].

It included the uprated H7861 [[power supply]] (which provided 36A of +5V, and 5A of +12V); and an H9276 9-slot [[QBUS#Backplane|Q22/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards.

Since it was a Q/[[CD interconnect|CD]] backplane, dual-width [[QBUS]] cards could only be placed in the left-hand slots, and quad QBUS-only cards had to not use any pins on the [[DEC edge connector contact identification|right-hand C/D connectors]]. (The only DEC card with this limitation seems to have been the [[MMV11-A]].)

It was available both with a front panel with a bezel (with '[[Bootstrap|Boot]]', '[[Halt]]' and '[[LTC]] On' switches, and power and run status indicators); and also with a blank front panel (for use as an expansion box).

It was a 5-1/4" tall mounting box, for the [[H960 rack|H960]] series of 19"-wide racks, 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-S mounting box was designed for these spaces.

For rack mounting purposes. it did not use external slides (as all the other BA11 mounting boxes did); instead, it was housed in an external 'skin' *termed a 'logic box cover' in DEC documentation, the base unit being called a 'logic box') into which it is slid; the cover would be bolted to the rack.

The backplane was mounted vertically, facing backward (unlike the BA11-M mounting box, where they had been facing forward). Cooling fans mounted on the side of the BA11-S passed air both over the boards, and through the power supply.

The BA11-S's dimensions were 5-1/4" high, 19" wide, and 22-3/4" deep, and it weighed 44 lbs (without any boards). The rack mounting was 26-3/4" long.

{{PDP-11}}

← Older revision		Revision as of 19:06, 1 August 2024
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	* ''PDP-11/23B Mounting Box Technical Manual'' (EK-23BMB-TM-001) - not available online		* ''PDP-11/23B Mounting Box Technical Manual'' (EK-23BMB-TM-001) - not available online
		+	* ''Expanding into a BA11-SA Box'', [[MicroNote]] #R12

	==External links==		==External links==

← Older revision		Revision as of 15:11, 26 July 2024
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	[[Category: DEC Mounting Boxes]]		[[Category: DEC Mounting Boxes]]
		+	[[Category: QBUS Hardware]]

← Older revision		Revision as of 01:22, 11 July 2023
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	* [http://www.bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf BA11-S Field Maintenance Print Set] (MP-01233)		* [http://www.bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf BA11-S Field Maintenance Print Set] (MP-01233)

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

@@ Line 11: / Line 11: @@
 For rack mounting purposes. it did not use external slides (as all the other BA11 mounting boxes did); instead, it was housed in an external 'skin' (termed a 'logic box cover' in DEC documentation, the base unit being called a 'logic box') into which it is slid; the cover would be bolted to the rack.
-The backplane was mounted vertically, facing backward (unlike the BA11-M mounting box, where they had been facing forward). Cooling fans mounted on the side of the BA11-S passed air both over the boards, and through the power supply.
+The backplane was mounted vertically, facing backward (unlike the [[BA11-M mounting box]], where they had been facing forward). Cooling fans mounted on the side of the BA11-S passed air both over the boards, and through the power supply.
 The BA11-S's dimensions were 5-1/4" high, 19" wide, and 22-3/4" deep, and it weighed 44 lbs (without any boards). The rack mounting was 26-3/4" long.
 ==Further reading==
@@ Line 21: / Line 27: @@
 ==External links==
 * [http://www.bitsavers.org/pdf/dec/pdp11/1123/EK-23BMB-UG_001_1123B_MountingBox_Jan82.pdf PDP-11/23B Mounting Box User's Guide] (EK-23BMB-UG-001)
 * [http://www.bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf BA11-S Field Maintenance Print Set] (MP-01233)
 [[Category: DEC Hardware]]

@@ Line 1: / Line 1: @@
 The '''BA11-S mounting box''' was a [[QBUS]] [[PDP-11]] [[mounting box]] from [[Digital Equipment Corporation|DEC]]; effectively a [[QBUS#Variable_address_size|Q22]] variant of the earlier [[BA11-N mounting box]]. The manual says the BA11-S was for [[PDP-11/23B]].
-It included the [[H7861 power supply]] (an up-rated version of the [[H786 power supply|H786]] of the BA11-N); and an H9276 9-slot [[QBUS#Backplanes|Q22/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards.
+It included the [[H7861 power supply]] (an up-rated version of the [[H786 power supply|H786]] of the BA11-N); and an [[H9276 backplane|H9276]] 9-slot [[QBUS#Backplanes|Q22/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards.
 Since it was a Q/[[CD interconnect|CD]] backplane, dual-width [[QBUS]] cards could only be placed in the left-hand slots, and quad QBUS-only cards had to not use any pins on the [[DEC edge connector contact identification|right-hand C/D connectors]]. (The only DEC card with a problem with this  seems to have been the [[MMV11-A QBUS core memory|MMV11-A]].)

@@ Line 1: / Line 1: @@
 The '''BA11-S mounting box''' was a [[QBUS]] [[PDP-11]] [[mounting box]] from [[Digital Equipment Corporation|DEC]]; effectively a [[QBUS#Variable_address_size|Q22]] variant of the earlier [[BA11-N mounting box]]. The manual says the BA11-S was for [[PDP-11/23B]].
-It included the up-rated H7861 [[power supply]] (which provided 36A of +5V, and 5A of +12V); and an H9276 9-slot [[QBUS#Backplane|Q22/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards.
+It included the up-rated H7861 [[power supply]] (which provided 36A of +5V, and 5A of +12V); and an H9276 9-slot [[QBUS#Backplanes|Q22/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards.
-Since it was a Q/[[CD interconnect|CD]] backplane, dual-width [[QBUS]] cards could only be placed in the left-hand slots, and quad QBUS-only cards had to not use any pins on the [[DEC edge connector contact identification|right-hand C/D connectors]]. (The only DEC card with a problem with this  seems to have been the [[MMV11-A]].)
+Since it was a Q/[[CD interconnect|CD]] backplane, dual-width [[QBUS]] cards could only be placed in the left-hand slots, and quad QBUS-only cards had to not use any pins on the [[DEC edge connector contact identification|right-hand C/D connectors]]. (The only DEC card with a problem with this  seems to have been the [[MMV11-A QBUS core memory|MMV11-A]].)
 It was available both with a front panel with a bezel (with '[[Bootstrap|Boot]]', '[[Halt]]' and '[[LTC]] On' switches, and power and run status indicators); and also with a blank front panel (for use as an expansion box).

← Older revision		Revision as of 00:52, 20 September 2018
Line 15:		Line 15:
	The BA11-S's dimensions were 5-1/4" high, 19" wide, and 22-3/4" deep, and it weighed 44 lbs (without any boards). The rack mounting was 26-3/4" long.		The BA11-S's dimensions were 5-1/4" high, 19" wide, and 22-3/4" deep, and it weighed 44 lbs (without any boards). The rack mounting was 26-3/4" long.

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