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EK-1134A-TM-002

June 1977

25 pages

Original

0.4MB

Document:	-002 PDP1134A PowerSys Jul77
Order Number:	EK-1134A-TM
Revision:	002
Pages:	25
Original Filename:	EK-1134A-TM-002_PDP1134A_PowerSys_Jul77.pdf

OCR Text

1st Edition, June 1977
2nd Edition, July 1977

terial in this manual is for informational
purposes and is subject to change without notice.
gital Equipment Corporation assumes no responsibility for any errors which may appear in this
manual.
rinted in U.S.A.

EC
DECCOMM
DECsystem-10
DECSYSTEM-20

ECtape
DECUS
DIGITAL
MASSBUS

LE OF CONT

...............................1 - 3
~
~
................................
1..................1............................1-4
.............................1 - 5
.......................................1-5
........................................1-5
& PDP1134A ..1-5
...........................1-7

o s Memory R e f r e s h ( C )
B
O
X
A 1 0 . 5 I n c h Box
o r y R e f r e s h ( B a t t e r y Powered)
H775 B a t t e r y Backup O p t i o n
H7441 And H785 R e g u l a t o r s
H7441 R e g u l a t o r
H785 R e g u l a t o r
Power S y s t e m D i f f e r e n e s Between PDP11/34
PDP1134A Power D i s t r i u t i o n

.........................
...
...........................
..........................
.........................
........................
......................
...............................................
...........................
..................

All-L Installation
-2-1
H775CA/CB TO PDP1134A 1 0 . 5 I n c h Box I n t e r c o n n e c t i o n
2-3
2-5
H785 R e g u l a t o r I n s t a l l a t i o n
H7441 R e g u l a t o r I n s t a l l a t i o n
2-7
2-7
B a c k p l a n e Jumper I n s t a l l a t i o n
B a c k p l a n e Jumper C o n f i g u r a t i o n
2-10
B a c k p l a n e +5V Power D i s t r i b u t i o n
2-10
General
2-10
FP11-AU Upgrade K i t J u m p e r s
2-11
2-13
B a t t e r y Backup I n t e r c o n n e c t i o n C a b l e

IGURE NO,

PAGE
-

TITLE
TO BA11-L Box Interconnection..

2-2

H775CA/CB TO PDP1134A 10.5 Inch Box
Interconnection.....................

2-4

. .. . 2 - 6
Backplane Jumpers ................... 2-9
+5 Volt Power Distribution.. ........ 2-12

H785 Requaltor Interconnection..

Interface Cable.....................

2-14

TABLES
PAGE
-

TITLE

TABLE NO.

1-1

OPTIONS.............................

1-2

PDP1134A POWER SYSTE

1-3

REGULATOR UNIT CONFIGURATIONS.......

1-6

2-1

BACKPLANE JUMPERS...................

2-10

1-2
m

1-5

1.0

INTRODUCTION
T h i s document i s p r o v i d e d a s i n i t i a l i n f o r m a t i o n t o h e l p t h e u s e r
u n d e r s t a n d and i n s t a l l a n H775 B a t t e r y Backup Assembly and t h e new
H7441 a n d H785 V o l t a g e R e g u l a t o r s u s e d i n t h e PDP1134A power s y s t e m .
The PDP1134A s y s t e m i s c o n t a i n e d i n e i t h e r a 5.25 i n c h B A 1 1 - L Mounting
box o r a 1 0 . 5 i n c h Mounting Box.
T h e B a t t e r y Backup U n i t ( B B U ) i s a n
e x t e r n a l a s s e m b l y t o t h e m o u n t i n g box and i s c o n n e c t e d v i a a n
i n t e r f a c e c a b l e ( S e e F i g u r e 2-6)
NOTE :

Before
continuing,
the
following
e x p l a n a t i o n may be n e c e s s a r y t o p r e v e n t
c o n Âu s i o n when d i s c u s s i n g t h e m o u n t i n g
box.
T h e c o m p l e t e m o u n t i n g box used w i t h
t h e PDP1134A i s made up o f t h e f o l l o w i n g :
@

BA11-KA
-- B a r e
power s u p p l y ) .

sheet

metal

box

(no

H765 ( 1 2 /240 Vac) -- Power S u p p l y ( n o
r e g u l a t o r s ) r e f e r t o NOTE; p a r a g r a p h
1.5.
Regulator Units:

R e f e r t o T a b l e 1-3.

B e c a u s e t h e r e i s no BA11-K d e s i g n a t i o n t h a t d e f i n e s a c o m p l e t e box i n
t h e PDP1134A s y s t e m , t h e c o m p l e t e box w i l l be r e f e r e d t o a s a 1 0 . 5
i n c h Mounting Box i n t h i s d o c u m e n t ,
box u s e d w i t h t h e PDPl1/34 d o e s n o t h a v e B a t t e r y Backup a s
an o p t i o n , t h e r e f o r e i t is n o t mentioned i n t h i s d e s c r i p t i o n e x c e p t t o
d i f f e r e n t i a t e b e t w e e n i t and t h e 1 0 . 5 i n c h box, u s e d w i t h t h e PDP1134A
t h a t d o e s have t h i s o p t i o n .
T h e BA11-K

NOTE :
R e f e r e n c e s made t o t h e PDP11/34 i n t h i s
document,
will
al s o apply
to
the
PDP11/04.
T h e o p t i o n s a v a i l a b l e w i t h t h e PDP1134A s y s t e m a r e l i s t e d i n T a b l e 1-1
a s f o l l o w s and a r e d e f i n e d f u r t h e r i n t h e t e x t .

T A B L E 1-1 O P T I O

OPTION
H775A (BA11-L

DESCRIPTION
Box Only)

@
@
@

B a t t e r y Pack
Battery Charger
I n t e r f a c e C a b l e t o MOS R e g u l a t o r

@
@

H775A
Transformer Assembly

@
@

H775A
T r a n s f o r m e r A s s e m b l y ( 2 4 0 VAC

( 1 2 0 VAC

attery Backup Regulator
@

@
@

H775BA
H785
Extender Cable(H785 to Console)
H775BB
H785
Extender Cable(H785 to Console)

OS Memorv R e f r e s h (AC)
OS Memory u n l i k e c o r e memory c o n s t a n t l y r e q u i r e s power t o
maintain its s t o r e d information.
A s y s t e m t h a t u s e s c o r e memory
may b e powered down and t h e i n f o r m a t i o n s t o r e d w i l l m a i n t a i n i t s
state.
NOS memory h o w e v e r , w i l l l o o s e i t s s t o r e d i n f o r m a t i o n i f
T h e r e f o r e , i n t h i s MOS memory s y s t e m , t o
power t o i t i s removed.
be a b l e t o power down and m a i n t a i n i n f o r m a t i o n s t o r e d i n memory,
t h e ON/OFF/STBY s w i t c h m u s t be s e t t o STBY ( S t a n d b y m o d e ) . R e f e r
t o STBY s w i t c h p o s i t i o n below.
NOTE :

MOS memory i n t h i s s y s t e m a s o f
t h e time o f
t h i s document
i n c l u d e s MS11-E, F. H, and J.
The ON/OFF/STBY s w i t c h l o c a t e d on t h e f r o n t p a n e l o f t h e P D P l l / 3 4
a n d PDP1134A CPU Box c a n be d e f i n e d a s f o l l o w s :

STBY ON
OFF

A l l l o g i c and f a n s a r e powered.
A l l l o g i c power and f a n s a r e o f f

*(STANDBY) MOS r e f r e s h v o l t a g e b u s e s a r e p o w e r e d ,
A l l
Only f a n s i n t h e BA11-L Box a r e powered.
o t h e r power i s o f f .

I n t h e BA11-L Box, t h e BBU n e e d n o t b e p r e s e n t f o r t h e STBY
function t o operate
AC i n p u t v i a t h e power c o r d i s
r e c t i f i e d i n t h e H777 power s u p p l y and t h e power f o r MOS
r e f r e s h ( r a w DC) i s f e d d i r e c t l y t o t h e MOS r e g u l a t o r
input.
1.1.2

PDP1134A 1 0 . 5 I n c h Box
I n t h e PDP1134A 1 0 . 5 I n c h Box, t h e AC i n p u t f o r MOS r e f r e s h
i s d e r i v e d from two s o u r c e s when t h e ON/OFF/STBY s w i t c h i s
s e t t o o n . T h e main AC power i s b r o u g h t i n t o t h e 1 0 . 5 i n c h
box, f u l l wave r e c t i f i e d t o raw DC and t h e n f e d t o t h e H 7 8 5
MOS r e g u l a t o r . T h i s r e f r e s h v o l t a g e d o e s n o t r e q u i r e a BBU
i n t h e system.

* T h i s o n l y a p p l i e s t o t h e BA11-L Box and t h e 1 0 . 5 i n c h box used
I n t h e B A l l - K Box and t h e
i n t h e PDP1134A t h a t h a s t h e BBU.
PDP1134A w i t h o u t BBU, STBY f u n c t i o n s a s a n OFF p o s i t i o n e

The PDP1134A s y s t e m w i t h BBU o p t i o n h a s a n a l t e r n a t i v e
s o u r c e o f AC i n p u t power f o r MOS memory r e f r e s h .
With t h e
ON/OFF/STBY s w i t c h s e t t o STBY, AC i n p u t i s b r o u g h t i n t o
t h e H775, f e d t o t h e H785 MOS r e g u l a t o r where i t i s t h e n
r e c t i f i e d t o raw DC f o r MOS memory r e f r e s h .
MOS Memory R e f r e s h ( B a t t e r y Powered)
The b a t t e r y p a c k ( R e f e r t o p a r a g r a p h 1 . 3 b e l o w ) p r o v i d e s r e f r e s h
power t o MOS memory i n a s i t u a t i o n when raw DC g o e s below a
p r e d e t e r m i n e d v a l u e s u c h a s d u r i n g a n AC power f a i l u r e .
In this
s i t u a t i o n , w i t h t h e ON/OFF/STBY s w i t c h s e t t o ON o r STBY, t h e
b a t t e r y p a c k t a k e s o v e r and p r o v i d e s b a t t e r y i n p u t v o l t a g e t o t h e
MOS r e g u l a t o r f o r a l i m i t e d t i m e .
1-3

H775 B a t t e r v Backup O u t i o n
T h e H775 BBU i s c o n t a i n e d i n a 5 . 2 5 i n c h
h i g h X 19 i n c h wide X
4.25 i n c h d e e p c h a s s i s .
T h i s s i z e makes i t s u i t a b l e f o r r a c k
m o u n t i n g . The BBU c o n t a i n s two 1 2 - V o l t b a t t e r i e s ( B a t t e r y Pack]

and a b a t t e r y c h a r g i n g c i r c u i t t o k e e p t h e b a t t e r i e s f u l l y
c h a r g e d . T h i s o p t i o n i s d e s i g n e d t o k e e p MOS memory a l i v e i n t h e
Should t h i s
e v e n t AC I n p u t power is removed from t h e s y s t e m .
o c c u r w i t h o u t a B a t t e r y Backup u n i t , i n f o r m a t i o n s t o r e d i n MOS
Memory would be l o s t .
The B a t t e r y Backup i n t h i s c a s e would t a k e
o v e r and p r o v i d e power t o MOS memory u n t i l t h e AC i n p u t power i s
e i t h e r r e s t o r e d or t h e b a t t e r i e s a r e dead.
It g e t s its input
The H775A was d e s i g n e d f o r t h e BA11-L Box.
Box, t h e r e b y
power f o r b a t t e r y c h a r g i n g v i a t h e B A 1 1 - L
e l i m i n a t i n g t h e need f o r i t s own AC power c o r d .
Using t h i s
B A 1 1 - L Box, AC i n p u t power is b r o u g h t i n t o t h e Box where i t i s
r e c t i f i e d t o raw DC.
T h i s v o l t a g e is then f e d v i a t h e i n t e r f a c e
c a b l e t o t h e BBU c h a r g i n g c i r c u i t t o keep t h e b a t t e r y p a c k f u l l y
charged.

I n o r d e r t o u s e t h e H775A i n t h e PDP1134A 1 0 . 5 i n c h b o x , a
t r a n s f o r m e r a s s e m b l y w i t h a n AC l i n e c o r d had t o be added t o t h e
BBU.
I n t h i s s y s t e m , AC i n p u t power i s b r o u g h t i n t o t h e H775
t r a n s f o r m e r v i a i t s own power c o r d , ted t o t h e H785 i n t h e 1 0 . 5
i n c h box v i a t h e i n t e r f a c e c a b l e where i t i s r e c t i f i e d t o raw DC
and t h e n r e t u r n e d t o t h e H775 f o r b a t t e r y c h a r g i n g .
With t h e ON/OFF/STBY s w i t c h on t h e f r o n t p a n e l s e t t o STBY, t h e
H775 t r a n s f o r m e r is t h e o n l y s o u r c e o f power t o t h e 1 0 . 5 i n c h
T h e H785 u s e s t h i s raw DC t o p r o v i d e r e f r e s h power t o MOS
box.
Memory and t o k e e p t h e b a t t e r y p a c k f u l l y c h a r g e d .

1.4

1.5

H7441 and H785 R e g u l a t o r s
1.4.1

H7441 R e g u l a t o r
T h e r e a r e two H7441 (+5V DC @ 3 2 Amps) V o l t a g e R e g u l a t o r s
c o n t a i n e d i n t h e 1 0 . 5 I n c h Mounting Box f o r t h e PDP1134A
system.
These r e g u l a t o r s a r e an upgrade v e r s i o n of t h e
H744 (+5V DC @ 25 Amps) V o l t a g e R e g u l a t o r s and a r e
d e s i g n e d t o b e u s e d w i t h t h e new 5410864-YA p o w e r
d i s t r i b u t i o n board.
T h i s new d e s i g n is r e q u i r e d by t h e
PDP1134A s y s t e m t o s u p p l y t h e e x t r a c u r r e n t n e e d e d by t h e
system backplanes.

1.4.2

H785 R e g u l a t o r
T h e H785 R e g u l a t o r i s d e s i g n e d t o p o w e r MOS memory
i n a PDP1134A MOS memory s y s t e m and t o p r o v i d e raw DC f o r
t h e H775 b a t t e r y c h a r g i n g c i r c u i t t o k e e p t h e b a t t e r i e s
charged.
T h e H785 i s p h y s i c a l l y l o c a t e d i n t h e PDP1134A
1 0 . 5 i n c h box.
T h e H775 i n t e r f a c e s w i t h t h e H785 a n
be l o c a t e d anywhere s u i t a b l e w i t h i n t h e l i m i t s o f t h e
T h e H785 MOS r e g u l a t o r i s l o c a t e d i n
interface cable.
r e g u l a t o r s l o t # 4 when a BBU i s p r e s e n t .

Power S y s t e m D i f f e r e n c e s Between PDP11/34 and PDP1.134A
The d i f f e r e n c e s between t h e PDP11/34 and PDP1134A power s y s t e m s
a r e l i s t e d below i n T a b l e 1-2.
Only s p e c i f i c f e a t u r e s t h a t do
n o t e x i s t i n , o r have been c h a n g e d from t h e PDP11/34 s y s t e m a r e
described*
TABLE 1 - 2 PDP1134A POWER SYSTEM
FEATURE

H785

H765
(Basic Chassis.
s e e Note b e l o w )

DESCRIPTION
MOS Memory R e g u l a t o r : S u p p l i e s r e g u l a t e d
+15 and -15V DC f o r MOS memory and + 5 V DC
"Bw v o l t a g e s f o r b a c k p l a n e m o d u l e s .
Power S u p p l y Assembly:
The s h e e t m e t a l
f o r t h i s assembly h a s been m o d i f i e d i n
t h e PDP1134A w i t h a n o p e n i n g i n t h e r e a r .
T h i s a l l o w s t h e BBU c a b l e t o a t t a c h t o
t h e H785 R e g u l a t o r .
+ 5 V o l t ; 32Amp R e g u l a t o r :
t o backplane modules.

Supplies

Power d i s t r i b u t i o n b o a r d . T h i s i s a n
u p g r a d e d v e r s i o n o f t h e 5410864-0 i n t h a t
a b u s b a r h a s been a d d e d t o a l l o w
d i s t r i b u t i o n o f t h e H785 R e g u l a t o r " B "
v o l t a g e s . A d d i t i o n a l w i r e s have been
added t o h a n d l e 32 Amps from t h e H7441
Regulators.

NOTE :
The basic
consists of

ply

chassis

AC Power C o n t r o l B o a r

3. Power

Distribution

Boar

er Cord ( 7
ower L i n e
6.

Transfor

ssembly

with

fans

(7011486)

is w i t h r e g u l a t o r u n i t
s i g n a t e d with 7 0 - 1 3 3 2 3 - X
numbers.
T h e s e n u m b e r s r e r e s e n t AC
input
power
and
regulator
unit
c o n f i g u r a t i o n s a s shown i n T a b l e 1 - 3 ,

TABLE 1-3 RE
C INPUT

REGULATORS

1.6

PDP1134A Power D i s t r i b u t i o n
The power d i s t r i b u t i o n b o a r d (5410864-YA) i n t h e PDP1134A 1 0 . 5
i n c h box i s a n u p g r a d e d v e r s i o n o f t h e 5 4 1 864-0 b o a r d used i n
t h e PDP11/34 s y s t e m , and i s s t a n d a r d i n t h e PDP1134A.
The
5410864-YA was d e s i g n e d t o a c c e p t a BBU o p t i o n f o r MOS memory and
t o be c a p a b l e o f h a n d l i n g a h i g h e r c u r r e n t ( 3 2 amps) g e n e r a t e d by
t h e H7441 r e g u l a t o r s u s e d i n t h e PDP1134A.
The p o w e r
d i s t r i b u t i o n b o a r d ( Y A v e r s i o n ) i s a l s o p a r t o f t h e FP11-AU
u p g r a d e k i t r e q u i r e d t o u p g r a d e t h e PDP11/34 s y s t e m t o f l o a t i n g
point.
NOTE ;

T h e r e a r e no a r r a n g e m e n t s f o r
u p g r a d i n g t h e PDP11/34 ( 1 0 . 5
i n c h box) t o i n c l u d e a B a t t e r y
Backup o p t i o n .
T h e 5410864-0 power d i s t r i b u t i o n b o a r d was d e s i g n e d t o be used
w i t h t h e H744 r e g u l a t o r s t h a t g e n e r a t e d o n l y 25 amps o f c u r r e n t .

T h e YA v e r s i o n a l s o c o n t a i n s b u s e s f o r t h e b a t t e r y "Bin v o l t a g e s
DK, C K backplanes, where a s t h e
r e q u i r e d b y t h e DD11-PK,

5410864-0 power d i s t r i b u t i o n b o a r d d o e s n o t h a v e t h e s e b u s e s .
The "B" v o l t a g e s (4-5, -15, and 4-15) a r e g e n e r a t e d by t h e H785
v o l t a g e r e g u l a t o r and s u p p l i e d t o t h e power d i s t r i b u t i o n b o a r d
f o r MOS memory.
Both t h e 5410864-0 b o a r d ( u s e d w i t h H744 R e g u l a t o r s ) and t h e
5410864-YA b o a r d ( u s e d w i t h H7441 R e g u l a t o r s ) d i s t r i b u t e t h e +5V
c u r r e n t g e n e r a t e d by t h e s e r e g u l a t o r s . T h e f i r s t r e g u l a t o r ( R e g *
# 2 ) s u p p l i e s c u r r e n t t o t h e CPU b a c k p l a n e a n d t h e s e c o n d
r e g u l a t o r (Reg. # 3 ) s u p p l i e s c u r r e n t t o a l l o t h e r b a c k p l a n e s .

INSTALLATION

I n s t a l l a t i o n of o p t i o n s a r e d e s c r i b e d i n t h i s S e c t i o n along w i t h
a s s o c i a t e d diagrams where a p p l i c a b l e . Diagrams a r e supported w i t h
i n s t r u c t i o n s t o cover any c o n f i g u r a t i o n t h a t t h e customer may r e q u i r e .
2.1

H775 t o B A 1 1 - L

Installation

Figure 2-1 shows t h e i n t e r c o n n e c t i o n between t h e MOS Regulator i n
t h e BA11-L H 7 7 7 power supply t o t h e H775A B a t t e r y Backup o p t i o n *
The i n t e r f a c e c a b l e c o n n e c t o r s have l o c a t i n g l u g s t h a t i n s u r e a
c o r r e c t connection.
T h i s c a b l e is shown i n Figure 2-6.

(Mas
REGULATOR

(ROUND, G R A Y )
701 1906-0

BA1-1-L

- MOUNTING BOX
(REAR VIEW1

H775 B A T T E R Y
BACKUP OPTION
(REAR VIEW)

7752% TO B A 1 1 - L
2-2

Box I n t e r c o n n e c t i o n

2.2

H775CA/CB To PDP1134A 1 0 . 5 I n c h Box I n t e r c o n n e c t i o n
F i g u r e 2 - 2 s h o w s t h e i n t e r c o n n e c t i o n b e t w e e n t h e H785 MOS
R e g u l a t o r i n t h e 1 0 . 5 i n c h box Power s u p p l y c o n n e c t e d t o t h e
H775CA/CB B a t t e r y Backup O p t i o n Ã T h i s i n t e r f a c e c a b l e i s t h e
same a s t h e o n e u s e d i n t h e BA11-L s y s t e m w i t h l o c a t i n g l u g s on
the connectors t o insure a c o r r e c t connection.
T h i s cable is
shown i n F i g u r e 2-6.

10.5 INCH MOUNTING
BOX

UNSWITCHED
OUTLET

FIGURE 2-2

H775CA/CB TO PDP1134A 10.5 Inch Box Interconnection

2.3

H785 R e g u l a t o r I n s t a l l a t i o n
The H785 r e g u l a t o r i s s e c u r e d t o t h e 1 0 . 5 i n c h box power s y s t e m
c h a s s i s w i t h t h r e e P h i l l i p s head s c r e w s .
The m o u n t i n g s c r e w s
p a s s t h r o u g h t h e c h a s s i s h o l e s and screw i n t o t h e r e g u l a t o r . T h e
p o s i t i o n o f t h e H785 i n t h e c h a s s i s i s s u c h t h a t i t s BBU
connection a l i g n s with an opening i n t h e s h e e t metal t o allow
c o n n e c t i o n o f t h e c a b l e from t h e H775 ( T h i s o p e n i n g may n o t be
p r e s e n t o n PDP11/34 1 0 . 5 " B o x ) .
T h e H785 a t t a c h e s t o t h e power
d i s t r i b u t i o n b o a r d i n t h e 1 0 . 5 I n c h Box i n r e g u l a t o r s l o t
location #4.
An a d d i t i o n a l c o n n e c t i o n i s made t o t h e f r o n t
c o n s o l e ( K Y 1 1 - L A o r LB) on J 2 . A f t e r t h e r e g u l a t o r is i n s t a l l e d ,
t h e A C y D C / L O w i r e s m u s t be c o n n e c t e d t o t h e Power d i s t r i b u t i o n
b o a r d and t o t h e AC i n p u t a s s e m b l y o f t h e 1 0 . 5 i n c h Mounting box
a s shown i n F i g u r e 2-3.
An e x t e n d e r c a b l e ( 7 0 1 1 4 1 1 - 2 J ) i s a l s o
provided.
One end c o n n e c t s t o t h e f l a t g r e y c a b l e (70133-4-1D)
o n t h e H785 a n d t h e o t h e r end c o n n e c t s t o J 2 on t h e c o n s o l e .

EXTENDER

AC, DCILO
CONNECTOR

.
H785 MOS MEMORY
/ REGULATOR

J2
CONNECTS
- TO BBU
INTERFACE
CABLE

CONNECTS T O J3 OR J4
(WHICHEVER IS NOT USED)
ON THE AC INPUT BOX
ASSEMBLY

2 PIN
^CABLE

CONNECTS
TO J8 O N
THE POWER
DISTRIBUTION
BOARD

AC.DC/LO CABLE 7013676-0
AC, DCILO D E T A I L

ulator Interconnection
2-

H7441 R e g u l a t o r I n s t a l l a t i o n
The two H7441 (32Amp @ +5V DC) r e g u l a t o r s c o n t a i n e d i n t h e 1
i n c h v e r s i o n o t t h e PDP1134A a r e i n s t a l l e d i n e x a c t l y t h e same
way, and i n t h e same p h y s i c a l p o s i t i o n s a s t h e H 7 4 4 ' s u s e d i n t h e
PDP11/34 s y s t e m .
They a r e e a c h s e c u r e d t o t h e 1 0 . 5 i n c h box
power s y s t e m c h a s s i s i n r e g u l a t o r s l o t l o c a t i o n s 2 a n d 3 w i t h
t h r e e p h i l l i p s head s c r e w s . The m o u n t i n g s c r e w s p a s s t h r o u g h t h e
c h a s s i s h o l e s and s c r e w i n t o t h e r e g u l a t o r s .

A layout of

t h e DD11-PK b a c k p l a n e i s shown i n F i g u r e 2-4.
j u m p e r s a r e shown on t h e b a c k p l a n e *

The v o l t a g e s jumpered
+5B.

a r e ; -15

t o -15B;

Three

+15 t o +15B; a n d 4-5 t o

NOTE ;

The v o l t a g e and s i g n a l
n o m e n c l a t u r e shown a d j a c e n t t o
t h e p i n s do n o t e x i s t on t h e
a c t u a l backplane.
T h e DD11-PK,

DK, CK w e r e d e s i g n e d t o p r o v i d e MOS r e f r e s h v o l t a g e s
T h i s means t h a t t h e MOS
s e p a r a t e from t h e o t h e r l o g i c v o l t a g e s .
r e f r e s h l o g i c c a n be powered when t h e r e s t of t h e l o g i c i n t h e
backplane is o f f .
The b a t t e r y backup o p t i o n u t i l i z e s t h i s
s p e c i a l b u s i n g o f MOS r e f r e s h v o l t a g e s .

When t h e DD11-PK/DK/CK a r e i n s t a l l e d i n a B A 1 1 - L ( 5 . 2 5 I n c h Box) ,
t h e H777 power s u p p l y p r o v i d e s t h e s p e c i a l " B " v o l t a g e s t o t h e
backplane.
B e c a u s e t h e b a c k p l a n e s f o r t h e PDP11/34 m u s t a l s o b e
u s e d i n t h e PDP1134A 1 0 . 5 i n c h box where t h e s e "B" v o l t a g e s a r e
n o t s u p p l i e d by t h e b a s i c power s u p p l y , j u m p e r s h a v e t o be used
t o connect these voltages t o a voltage source a v a i l a b l e i n t h e
1 0 . 5 i n c h box.
T h i s s o u r c e i s t h e e x i s t i n g +5V, +15V, and -15V.
T h e j u m p e r s on
t h e b a c k p l a n e s i m p l y s h o r t t h e "B" b u s e s t o t h e normal r a i l s ,

e c i a l v o l t a g e s u s e d by MOS Memory a r e a s f o l l o w s :
+5B
+15B
-15B

Used by MOS memory t o power TTL i n r e f r e s h l o g i c .
Used by MOS memory t o d e r i v e +12V f o r t h e a r r a y c h i p s .
Used by MOS memory t o d e r i v e -9V f o r t h e a r r a y c h i p s .

When t h e DDll-PK,DKyCK b a c k p l a n e s a r e u s e d i n t h e 1 0 . 5 i n c h box
f o r t h e PDP11/34, a n d PDP1134A w i t h o u t BBU t h e j u m p e r s shown i n
F i g u r e 2-4 m u s t b e i n s t a l l e d . I f t h e s e j u m p e r s a r e n o t i n s t a l l e d f
t h e +5B, -15B, a n d +15B r a i l s would b e l e f t f l o a t i n g e
W i t h t h e BBU p r e s e n t i n t h e PDP1134A, t h e j u m p e r s m u s t b e
removed. W i t h o u t a BBU p r e s e n t , a l l t h e j u m p e r s shown i n F i g u r e
2-4 m u s t b e i n s t a l l e d i n t h e CPU b a c k p l a n e a n d o n l y t h e +15V a n d
-15V j u m p e r s n e e d t o be i n s t a l l e d on a n y o t h e r b a c k p l a n e s i n t h e
box.
The +5V j u m p e r i s l e f t o f f t h e s e non-CPU b a c k p l a n e s b e c a u s e
t h e YA b o a r d h a s a + 5 B b u s b a r t h a t i s common t o a l l b a c k p l a n e s .
W i t h t h i s jumper i n t h e CPU b a c k p l a n e , a l l b a c k p l a n e s a r e
suppl led.

+5V JUMPER

NOTES
1. JUMPERS SHOWN ARE
-15 T O - 1 5 6

+I
5 T O +15B
+5 T O +5B
2. USE #20 INSULATED
BUS WIRE FOR JUMPERS

VIEW A

FIGURE 2-4

Backplane Jumpers

T a b l e 2-1 b e l o w i s a l i s t o f t h e
r e q u i r e d backplane jumpers, it any.
TABLE 2-1.

system mounting

boxes

and

their

BACKPLANE JUMPER

SYSTEM
BA11-L Box w i t h B a t t e r y
Backup O p t i o n

o Jumpers

B A l l - L Box w i t h o u t B a t t e r y
Backup O p t i o n

No J u m p e r s

PDP11/34 1 0 . 5 I n c h Box

A l l jumpers i n each backplane

(Refer t o paragraph 2.7)

2.7

PDP1134A; 1 0 . 5 I n c h Box
w i t h B a t t e r y Backup O p t i o n

o Jumpers

PDP1134A; 1 0 . 5 I n c h Box
W i t h o u t B a t t e r y Backup
Option

CPU B a c k p l a n e j u m p e r s o n l y
( R e f e r t o p a r a g r a p h 2.7)

B a c k p l a n e +5V P o w e r D i s t r i b u t i o n
General
The power d i s t r i b u t i o n b o a r d e x i s t i n
i n t h e 10.5 inch
m o u n t i n g box i s e i t h e r a 5 4 1 0 8 6 4 - 0 o r a 5410864-YA.
The
d e s c r i p t i o n o f t h e s e boards is d i s c u s s e d i n paragraph 1.6
in the Introduction Section.
T h e 5 4 1 0 8 6 4 - 0 b o a r d w a s n o t d e s i g n e d t o be u s e d w i t h t h e
U o p t i o n , t h e r e f o r e i t d o e s n o t c o n t a i n +5B, -15B a n d
+15B b u s e s .
I n o r d e r f o r t h i s b o a r d t o p r o v i d e "B"
v o l t a g e s , a l l backplanes have t o have jumpers i n s t a l l e d
t o + 5 , - 1 5 , a n d +15V s o u r c e s .
Paragraph 2.5 d i s c u s s e d
t h e s e j umpers ,
h e YA v e r s i o n w a s d e s i g n e d f o r t h e
BU o p t i o n .
With
t h i s o p t i o n p r e s e n t , a n H785 r e g u l a t o r e x i s t s i n t h e
m o u n t i n g b o x a n d +5B i s o n t h e b u s b a r ( R e f e r t o F i g u r e
2-5).
I n a s i t u a t i o n w h e r e a BBU i s n o t p r e s e n t i n t h e
s y s t e m , t h e r e i s n o H785 r e g u l a t o r , t h e r e f o r e , t h e r e i s
n o +5B o n t h e b u s b a r .
In t h i s s i t u a t i o n , we can i n s t a l l
a j u m p e r f r o m +5V t o +5B o n t h e CPU b a c k p l a n e .

T h i s p l a c e s 5V o n t h e
s u p p l i e d by t h e 5V, 3 2

b u s b a r and a l l b a c k p l a n e s
p r e g u l a t o r (Reg # 2 )

are

- CAUTION DO NOT INSTALL A JUMPER BETWEEN +5V
AND +5B AT ANY OTHER POINT I N THE
POWER DISTRIBUTION SYSTEM I N THE
PDP1134A WITHOUT BBU ( O R P D P l l / 3 4
USING YA VERSION) W H I L E THERE I S ONE
ON THE CPU BACKPLANE.
THIS PLACES
BOTH 5V REGULATORS I N PARALLEL W H I C H
I S UNDESIRABLE.

I f t h e r e i s a n y MOS memory p r e s e n t i n a n y b a c k p l a n e i n
t h e same b o x , i t w i l l h a v e i t s r e f r e s h c i r c u i t r y powered
by t h e +5V r e g u l a t o r t h a t i s p r o v i d i n g power t o t h e
b a c k p l a n e w i t h t h e +5V t o +5B j u m p e r .
That r e g u l a t o r
w i l l t h e r e f o r e b e r e q u i r e d t o f u r n i s h 0 . 5 amps o f c u r r e n t
f o r each
S l l b o a r d p r e s e n t i n t h e box r e g a r d l e s s o f
w h i c h b a c k p l a n e i t may b e l o c a t e d i n .

2.7.2

U o a r a d e K i t Jumpers

FP11-AU

When a PDP11/34 s y s t e m i s u p g r a d e d t o i n c l u d e f l o a t i n g
p o i n t c a p a b i l i t y (FP11-AU K i t ) ,
the p o s s i b i l i t y of
p l a c i n g b o t h 5V r e g u l a t o r s i n p a r a l l e l i s g r e a t e s t .
This
i s b e c a u s e a l l b a c k p l a n e s had a l l j u m p e r s p r e v i o u s l y
installed.
A l l +5V t o +5B j u m p e r s m u s t now b e removed
f r o m a l l b a c k p l a n e s i n t h e same b o x , e x c e p t on t h e CPU
backplane.
NOTE :
F i g u r e 2-5 s h o w s how + 5 V o l t s i s
c o n n e c t e d t o t h e +5B b u s b a r when
b o t h , t h e BBU o p t i o n i s c o n n e c t e d
t o t h e s y s t e m , and when t h e BBU
o p t i o n is n o t used:
@

With BBU i n t h e s y s t e m ; t h e H785
R e g u l a t o r s u p p l i e s t h e +5B v i a
Jl-4.
W i t h o u t t h e BBU o p t i o n ; t h e H785
Regulator is not p r e s e n t .
We
as
c a n t h e n i n s t a l l a jumper
i n d i c a t e d by t h e Note 2 c a l l o u t .

NOTE 1

+5B bus bar. Available on the 54-10864-YA Distribution Panel
only. I t was designed for a Battery Backup system.

NOTE 2

This jumper must be installed i n the CPU backplane if a Battery
Backup option is not present. I t places +5 Volts o n the +5B bus
bar for distribution to backplane modules.

FIGURE 2-5

NOTE 3

This reaulator mav be present if there is no Battery Backup option

NOTE 4

This regulator is inserted i n regulator slot location -:4 i f a Battery Backup
option is present. I t supplies +15B; - 1 5 8 & +5B t o the bus bar
for MOS memory.

+5 Volt Power Distribution

F i g u r e 2-6 i l l u s t r a t e s t h e i n t e r c o n n e c t i n g c a b l e b e t w e e n t h e
B a t t e r y B a c k u p U n i t a n d t h e MOS R e g u a l t o r i n t h e system M o u n t i n g
Box.

PIN I--,

1
1
1

1
2

1
1
1

VIEW A - A

LOCATING LUGS

*Pins 7 and 8 were added to the cable
on Rev. C. This is required for the
10.5 inch box if the BBU option is used.

F I G U R E 2-6

Interface C a b l e
2-14

BLACK

1
1
1

BLUE

3
4

COLOR
ORANGE

GRAY

SIGNAL
RAWDC
GND
BATTERYOUT

CHARGEMODE

1
1
1