H742 Power Supply - Revision history

Jnc: New cat

2023-07-10T12:59:28Z

New cat

← Older revision		Revision as of 12:59, 10 July 2023
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	* [https://mouser.com/ProductDetail/VCC/6073-001-634R?qs=QjVfaZ6cteJFZI1gq5P05A%3D%3D Mouser Replacement Lamp] - VCC 6073-001-634R		* [https://mouser.com/ProductDetail/VCC/6073-001-634R?qs=QjVfaZ6cteJFZI1gq5P05A%3D%3D Mouser Replacement Lamp] - VCC 6073-001-634R

	[[Category: DEC ~~Electrical~~]]		[[Category: DEC Power Supplies]]

Ashlin4010 at 07:49, 28 March 2023

2023-03-28T07:49:15Z

← Older revision		Revision as of 07:49, 28 March 2023
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	A later version of the basic H742 is the H742A; the difference is not yet known.		A later version of the basic H742 is the H742A; the difference is not yet known.

	For the H7420, in addition to the board above, the differences seem to be mainly mechanical: a larger cooling fan; a change in the orientation of the +15V supply board from horizontal to vertical (perhaps to make room for the ~~fant~~); and the sheet metal enclosure holding the fan, board and transformer is a single unit, not two bolted together, as in the H742.		For the H7420, in addition to the board above, the differences seem to be mainly mechanical: a larger cooling fan; a change in the orientation of the +15V supply board from horizontal to vertical (perhaps to make room for the fans); and the sheet metal enclosure holding the fan, board and transformer is a single unit, not two bolted together, as in the H742.

	==See also==		==See also==
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	* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)		* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)
	* [https://bitsavers.org/pdf/dec/pdp11/PDP-11_Mainframe_Troubleshooting_Guide_Dec76.pdf PDP-11 Mainframe Troubleshooting Guide] - the H742 connector pinout can be found on page 114		* [https://bitsavers.org/pdf/dec/pdp11/PDP-11_Mainframe_Troubleshooting_Guide_Dec76.pdf PDP-11 Mainframe Troubleshooting Guide] - the H742 connector pinout can be found on page 114
			* [https://mouser.com/ProductDetail/VCC/6073-001-634R?qs=QjVfaZ6cteJFZI1gq5P05A%3D%3D Mouser Replacement Lamp] - VCC 6073-001-634R

	[[Category: DEC Electrical]]		[[Category: DEC Electrical]]

Ashlin4010: /* External links */

2023-03-25T21:05:07Z

External links

← Older revision		Revision as of 21:05, 25 March 2023
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	* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)		* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)
	* [https://bitsavers.org/pdf/dec/pdp11/PDP-11_Mainframe_Troubleshooting_Guide_Dec76.pdf PDP-11 Mainframe ~~TroubleshootingGuide~~] - the H742 connector pinout can be found on page 114		* [https://bitsavers.org/pdf/dec/pdp11/PDP-11_Mainframe_Troubleshooting_Guide_Dec76.pdf PDP-11 Mainframe Troubleshooting Guide] - the H742 connector pinout can be found on page 114

	[[Category: DEC Electrical]]		[[Category: DEC Electrical]]

Ashlin4010: /* External links */

2023-03-25T21:04:34Z

External links

← Older revision		Revision as of 21:04, 25 March 2023
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	* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)		* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)
			* [https://bitsavers.org/pdf/dec/pdp11/PDP-11_Mainframe_Troubleshooting_Guide_Dec76.pdf PDP-11 Mainframe TroubleshootingGuide] - the H742 connector pinout can be found on page 114

	[[Category: DEC Electrical]]		[[Category: DEC Electrical]]

Jnc: New cat

2022-06-16T12:16:18Z

New cat

← Older revision		Revision as of 12:16, 16 June 2022
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	* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)		* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)

	[[Category: DEC ~~Hardware~~]]		[[Category: DEC Electrical]]

Jnc: /* External links */ covered here

2022-01-11T12:28:24Z

External links: covered here

← Older revision		Revision as of 12:28, 11 January 2022
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	* [[H765 Power System]]		* [[H765 Power System]]

			==External links==

			* [http://www.bitsavers.org/pdf/dec/pdp11/1160/EK-11060-SV-01_1160cab_Feb78.pdf PDP-11/60 cabinet and power supply manual] - the H7420 is covered in Chapter 3 (pg. 32 of the scanned version)

	[[Category: DEC Hardware]]		[[Category: DEC Hardware]]

Jnc: Tweaks to presentation and contents

2019-06-10T18:00:54Z

Tweaks to presentation and contents

← Older revision		Revision as of 18:00, 10 June 2019
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	The '''H742 Power Supply''', and later revision '''H7420''', is a modular [[power supply]] system from [[Digital Equipment Corporation\|DEC]], used with the [[BA11-F Mounting Box]]. Among other uses, ~~this~~ mounting box is used in [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] systems to hold the [[Central Processing Unit\|CPU]].		The '''H742 Power Supply''', and later revision '''H7420''', is a modular [[power supply]] system from [[Digital Equipment Corporation\|DEC]], used with the [[BA11-F Mounting Box]]. Among other uses, that mounting box is used in [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] systems to hold the [[Central Processing Unit\|CPU]].

	The H742/H7420 runs off standard wall [[Alternating current\|AC]]; it can be [[jumper]]ed to use either 110V or 220V supply.		The H742/H7420 runs off standard wall [[Alternating current\|AC]]; it can be [[jumper]]ed to use either 110V or 220V supply.
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	Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].		Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].

	A 5409730 board in the H742, replaced by an ~~[[DEC Power Line Monitor\|~~5411086 board]] in the H7420, supplies a modest amount of +15V [[Direct current\|DC]] power to various backplanes mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.		A [[DEC Power Line Monitor\|5409730 board]] in the H742, replaced by an 5411086 board in the H7420, supplies a modest amount of +15V [[Direct current\|DC]] power to various backplanes mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.

	The harness used [[DEC power distribution connectors]] to provide power to the backplanes; it normally used the [[DEC standard power wire colour coding]].		The harness from the H742/H7420 (the same for both, it appears) used [[DEC power distribution connectors]] to provide power to the backplanes; it normally used the [[DEC standard power wire colour coding]].

	The H742/H7420 did not support the [[Remote Switching Control Bus]]; the H742/H7420 was generally plugged into an [[861 Power Controller]], which did have the remote control capability.		The H742/H7420 did not support the [[Remote Switching Control Bus]]; the H742/H7420 was generally plugged into an [[861 Power Controller]], which did have the remote control capability.

	A later version of the basic H742 is the H742A; the difference is not yet known. For the H7420, in addition to the board above, the differences ~~are~~ mechanical; a larger cooling fan, and the sheet metal ~~cavity~~ holding it, ~~the~~ board and ~~the~~ transformer is a single unit, not two bolted together, as in the H742.		A later version of the basic H742 is the H742A; the difference is not yet known.

			For the H7420, in addition to the board above, the differences seem to be mainly mechanical: a larger cooling fan; a change in the orientation of the +15V supply board from horizontal to vertical (perhaps to make room for the fant); and the sheet metal enclosure holding the fan, board and transformer is a single unit, not two bolted together, as in the H742.

	==See also==		==See also==

Jnc: Details on H7420 differences

2019-06-07T13:55:12Z

Details on H7420 differences

← Older revision		Revision as of 13:55, 7 June 2019
Line 1:		Line 1:
	The '''H742 Power Supply''' is a modular [[power supply]] system from [[Digital Equipment Corporation\|DEC]], used with the [[BA11-F Mounting Box]]~~; among~~ other uses, this mounting box is used in		The '''H742 Power Supply''', and later revision '''H7420''', is a modular [[power supply]] system from [[Digital Equipment Corporation\|DEC]], used with the [[BA11-F Mounting Box]]. Among other uses, this mounting box is used in [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] systems to hold the [[Central Processing Unit\|CPU]].
	[[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] systems to hold the [[Central Processing Unit\|CPU]].

	The H742 runs off standard wall [[Alternating current\|AC]]; it can be [[jumper]]ed to use either 110V or 220V supply.		The H742/H7420 runs off standard wall [[Alternating current\|AC]]; it can be [[jumper]]ed to use either 110V or 220V supply.

	The main [[transformer]] in the H742 provides 20-30V AC to several [[DEC standard modular regulators]] (up to five, in spaces numbered 'A' through 'E') mounted in the H742, which provide other voltages such as +5V to the [[backplane]]s in the mounting box.		The main [[transformer]] in the H742/H7420 provides 20-30V AC to several [[DEC standard modular regulators]] (up to five, in spaces numbered 'A' through 'E') mounted in the H742/H7420, which provide other voltages such as +5V to the [[backplane]]s in the mounting box.

	Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].		Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].

	A 5409730 board in the H742 supplies a modest amount of +15V [[Direct current\|DC]] power to various backplanes mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.		A 5409730 board in the H742, replaced by an [[DEC Power Line Monitor\|5411086 board]] in the H7420, supplies a modest amount of +15V [[Direct current\|DC]] power to various backplanes mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.

	The harness used [[DEC power distribution connectors]] to provide power to the backplanes; it normally used the [[DEC standard power wire colour coding]].		The harness used [[DEC power distribution connectors]] to provide power to the backplanes; it normally used the [[DEC standard power wire colour coding]].

	The H742 did not support the [[Remote Switching Control Bus]]; the H742 was generally plugged into an [[861 Power Controller]], which did have the remote control capability.		The H742/H7420 did not support the [[Remote Switching Control Bus]]; the H742/H7420 was generally plugged into an [[861 Power Controller]], which did have the remote control capability.

	~~Later versions~~ of the basic H742 ~~are~~ the H742A ~~and H7420A~~; the differences are not ~~yet known~~.		A later version of the basic H742 is the H742A; the difference is not yet known. For the H7420, in addition to the board above, the differences are mechanical; a larger cooling fan, and the sheet metal cavity holding it, the board and the transformer is a single unit, not two bolted together, as in the H742.

	==See also==		==See also==

Jnc: Add 15V board

2019-06-06T17:16:17Z

Add 15V board

← Older revision		Revision as of 17:16, 6 June 2019
Line 1:		Line 1:
	The '''H742 Power Supply''' is a modular [[power supply]] system from [[Digital Equipment Corporation\|DEC]], used in [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] systems ~~mounted in a~~ [[~~BA11-F Mounting Box~~]].		The '''H742 Power Supply''' is a modular [[power supply]] system from [[Digital Equipment Corporation\|DEC]], used with the [[BA11-F Mounting Box]]; among other uses, this mounting box is used in
			[[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] systems to hold the [[Central Processing Unit\|CPU]].

	It runs off standard wall [[Alternating current\|AC]]; it can be [[jumper]]ed to use either 110V or 220V supply.		The H742 runs off standard wall [[Alternating current\|AC]]; it can be [[jumper]]ed to use either 110V or 220V supply.

	The ~~H742 supplies a modest amount of +15V~~ [[~~Direct current\|DC~~]] ~~power~~ to ~~various~~ [[~~backplane~~]]s mounted in the ~~BA11-F~~, ~~along with a~~ [[~~line time clock~~]] ~~signal, and AC and DC 'power OK' signals~~.		The main [[transformer]] in the H742 provides 20-30V AC to several [[DEC standard modular regulators]] (up to five, in spaces numbered 'A' through 'E') mounted in the H742, which provide other voltages such as +5V to the [[backplane]]s in the mounting box.

	~~It also supplies 20-30V AC to several~~ [[~~DEC standard modular regulators~~]] ~~(up~~ to ~~five,~~ in spaces ~~numbered '~~A~~' through '~~E~~') mounted in the H742~~, ~~which provide other voltages such as +~~5V ~~to the backplanes in the mounting box~~.		Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].

	~~Generally~~ the [[~~power harness~~]] ~~supports only limited options as~~ to ~~which regulator can be~~ in ~~which spaces; e.g.~~ the ~~later~~ -~~11/40 harness mandates that A~~, ~~B and C hold~~ [[~~H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator~~]], and ~~E may hold either an H745 or [[H754 +20V, -5V Regulator]]~~.		A 5409730 board in the H742 supplies a modest amount of +15V [[Direct current\|DC]] power to various backplanes mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.

	The harness used [[DEC power distribution connectors]] to provide power to the backplanes; it normally used the [[DEC standard power wire colour coding]].		The harness used [[DEC power distribution connectors]] to provide power to the backplanes; it normally used the [[DEC standard power wire colour coding]].
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	==See also==		==See also==

	* [[H765 Power System ]]		* [[H765 Power System]]

	[[Category: DEC Hardware]]		[[Category: DEC Hardware]]

Jnc: Avoid redir after move

2018-09-26T21:43:27Z

Avoid redir after move

← Older revision		Revision as of 21:43, 26 September 2018
Line 5:		Line 5:
	The H742 supplies a modest amount of +15V [[Direct current\|DC]] power to various [[backplane]]s mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.		The H742 supplies a modest amount of +15V [[Direct current\|DC]] power to various [[backplane]]s mounted in the BA11-F, along with a [[line time clock]] signal, and AC and DC 'power OK' signals.

	It also supplies 20-30V AC to several [[DEC standard modular ~~regulator~~]]s (up to five, in spaces numbered 'A' through 'E') mounted in the H742, which provide other voltages such as +5V to the backplanes in the mounting box.		It also supplies 20-30V AC to several [[DEC standard modular regulators]] (up to five, in spaces numbered 'A' through 'E') mounted in the H742, which provide other voltages such as +5V to the backplanes in the mounting box.

	Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].		Generally the [[power harness]] supports only limited options as to which regulator can be in which spaces; e.g. the later -11/40 harness mandates that A, B and C hold [[H744 +5V Regulator]]s, D holds an [[H745 -15V Regulator]], and E may hold either an H745 or [[H754 +20V, -5V Regulator]].