Difference between revisions of "DEC engineering drawing numbers"

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(Found in PDP-9 drawings)
 
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'''DEC drawing codes''', embedded in the drawing numbers of [[Digital Equipment Corporation|DEC]] engineering drawings, allow one to discern what kind of information is conveyed in that particular drawing. A DEC drawing number will be of the form AA-bbbb-x-yy, where 'AA' is the drawing code, 'bbbb' is the device which the drawing is of, 'x' (a digit) is the 'manufacturing series', and 'yy' is the page number within the set.
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'''DEC engineering drawing numbers''' will usually be of the form Z-AA-bbbb-x-yy, where 'AA' is the 'drawing code' (below), 'bbbb' is the device which the drawing is of, 'x' (a digit) is the 'manufacturing series', and 'yy' is the page number within the drawing set. They are often seen with a preceding single-letter code ('Z' above), which indicates the size of the original drawing (listed below).
  
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The list of drawing codes, as of circa 1964, was:
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==Drawing codes==
 +
 
 +
[[Digital Equipment Corporation|DEC]] drawing codes, embedded in the drawing numbers of DEC engineering drawings, allow one to discern what kind of information is conveyed in that particular drawing. The list of drawing codes, as of circa 1964, was:
  
 
{| class="wikitable"
 
{| class="wikitable"
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|-
 
|-
 
| BD || Functional Block Diagram
 
| BD || Functional Block Diagram
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|-
 +
| BS || Block Schematic
 
|-
 
|-
 
| CD || Cable Diagram
 
| CD || Cable Diagram
 +
|-
 +
| CL || Cable List
 
|-
 
|-
 
| CP || Component List
 
| CP || Component List
 
|-
 
|-
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| CS || Circuit Schematic
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| CS || [[Circuit]] Schematic
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|-
 +
| DL || [[Diode]] List
 
|-
 
|-
 
| FD || Flow Diagram
 
| FD || Flow Diagram
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|-
 
|-
 
| LO || Layout Drawing
 
| LO || Layout Drawing
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|-
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| ML || [[Module]] List (possibly 'Master Drawing List')
 
|-
 
|-
 
| MU || Module Utilization Drawing
 
| MU || Module Utilization Drawing
 
|-
 
|-
 
| PL || Parts List
 
| PL || Parts List
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|-
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| RL || Replacement List
 
|-
 
|-
 
| RS || Replacement Schematic
 
| RS || Replacement Schematic
 
|-
 
|-
 
| SD || Specification Drawing
 
| SD || Specification Drawing
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|-
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| TL || [[Terminator]] List
 
|-
 
|-
 
| TD || Timing Diagram
 
| TD || Timing Diagram
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|-
 
|-
 
| WL || Wiring List
 
| WL || Wiring List
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|}
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Additional drawing codes, seen in later print sets, and their apparent meaning (where possible), are:
 +
 +
{| class="wikitable"
 +
! Code !! Meaning
 +
|-
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| AH || Assembly Hole Layout
 +
|-
 +
| AL || Accessory List
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|-
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| CO || Co-ordinate Hole Location List
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|-
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| DC || Decal ?
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|-
 +
| DD || Drawing Directory
 +
|-
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| EC || [[Etch]] Cut
 +
|-
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| IA || ? Assembly?
 +
|-
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| IS || ? Specification?
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|-
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| MD || Module ?
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|-
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| MH || Module [[Engineering Change Order|ECO]] History
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|-
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| PC || [[PCB]] ?
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|-
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| PS || Parts ?
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|-
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| SP || Specification? Procedure?
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|-
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| TC || Table of Contents
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|-
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| UA || Unit? Assembly?
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|-
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| WT || Wiring ?
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|}
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==Drawing sizes==
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 +
Drawings are usually reduced to 11"x17" (A3, in contemporary paper sizes) for inclusion in print sets sent to customers. The list of drawing size codes for the originals, as of circa 1962, was:
 +
 +
{| class="wikitable"
 +
! Code !! Size
 +
|-
 +
| A || 8-1/2" x 11"
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|-
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| B || 11" x 17" (twice 'A')
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|-
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| C || 17" x 22" (twice 'B')
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|-
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| D || 22" x 34" (twice 'C')
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|-
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| E || Larger than 'D' (most are 30" x 42")
 
|}
 
|}
  
 
==See also==
 
==See also==
  
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*[[DEC part number]]s
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* [[DEC part number]]s
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==External links==
  
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<!-- ==External links== -->
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* [http://ana-3.lcs.mit.edu/~jnc/tech/FMPSOnline.html 'Missing' Digital Equipment Corporation Field Maintenance Print Sets Online]
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* [http://www.bitsavers.org/pdf/dec/catalog/MaintenancePrintPNs.txt Maintenance Print list]
  
 
[[Category: Digital Equipment Corporation]]
 
[[Category: Digital Equipment Corporation]]

Latest revision as of 21:14, 9 January 2022

DEC engineering drawing numbers will usually be of the form Z-AA-bbbb-x-yy, where 'AA' is the 'drawing code' (below), 'bbbb' is the device which the drawing is of, 'x' (a digit) is the 'manufacturing series', and 'yy' is the page number within the drawing set. They are often seen with a preceding single-letter code ('Z' above), which indicates the size of the original drawing (listed below).

Drawing codes

DEC drawing codes, embedded in the drawing numbers of DEC engineering drawings, allow one to discern what kind of information is conveyed in that particular drawing. The list of drawing codes, as of circa 1964, was:

Code Meaning
AD Assembly Drawing
AR Arrangement Drawing
BD Functional Block Diagram
BS Block Schematic
CD Cable Diagram
CL Cable List
CP Component List
CS Circuit Schematic
DL Diode List
FD Flow Diagram
IC Interface Cabling Diagram
LO Layout Drawing
ML Module List (possibly 'Master Drawing List')
MU Module Utilization Drawing
PL Parts List
RL Replacement List
RS Replacement Schematic
SD Specification Drawing
TL Terminator List
TD Timing Diagram
UA Unit Assembly
WD Wiring Diagram
WL Wiring List

Additional drawing codes, seen in later print sets, and their apparent meaning (where possible), are:

Code Meaning
AH Assembly Hole Layout
AL Accessory List
CO Co-ordinate Hole Location List
DC Decal ?
DD Drawing Directory
EC Etch Cut
IA  ? Assembly?
IS  ? Specification?
MD Module ?
MH Module ECO History
PC PCB ?
PS Parts ?
SP Specification? Procedure?
TC Table of Contents
UA Unit? Assembly?
WT Wiring ?

Drawing sizes

Drawings are usually reduced to 11"x17" (A3, in contemporary paper sizes) for inclusion in print sets sent to customers. The list of drawing size codes for the originals, as of circa 1962, was:

Code Size
A 8-1/2" x 11"
B 11" x 17" (twice 'A')
C 17" x 22" (twice 'B')
D 22" x 34" (twice 'C')
E Larger than 'D' (most are 30" x 42")

See also

External links

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