Digital PDFs

EK-BA11N-UG-001

2000

60 pages

Original

21MB

view download

OCR Version

9.6MB

view download

Document:	BA11-N Mounting Box User's Guide
Order Number:	EK-BA11N-UG
Revision:	001
Pages:	60
Original Filename:

OCR Text

EK-BA11N-UG-001

digital equipment corporation - maynard, massachusetts

1st Edition, January 1978

The material in this manual is for informational
purposes and is subject to change without notice.

Digital Equipment Corporation assumes no responsibility for any errors which may appear in this
manual.
Printed in U.S.A.

This document was set on DIGITAL’s DECset-8000
computerized typesetting system.

The following are trademarks of Digital Equipment
Corporation, Maynard, Massachusetts:
DEC

DECtape

PDP

DECCOMM

DECUS

RSTS

DECsystem-10

DIGITAL

TYPESET-8

DECSYSTEM-20

MASSBUS

TYPESET-11

UNIBUS

CONTENTS

Page

VT
g
GO

o PRV TN -

FS By 6

CHAPTER 1

CHAPTER 2

INTRODUCTION

BAI l“N APPLICATIONS“O*"'010'%0"00’!1'0.0000‘0‘01‘O‘#‘0“**0'*fifi“fi*fl‘&fi‘flflflli&flifii“lfififi"*fifl.'lfll&‘fi’*i1 |
LSI‘ll ABACKPLANES (AR E R AR A R SRR R R R R A R R R R R R R R R RN R R R A R R S R R R R R R R R R R R R R R R R R R R R E R R R R RS R RN MODU[LE LOADING OF THE LSI"II BUS‘fl.l%fl’ifli"“0#*0'*'1“‘“%"0.Ql*lfi‘&‘.'lflil’i*"fl.“
q

IFICATION
SPECII
ICATIO S AR A R AR AR R AR R R R R R R R R R R R R R R R R R R R R R R R R R R R R R S R R A R R R "1
RELA1 ED DOCUMENTSO’00&0!“‘*0'0’0'*"fl‘i‘lfl lllll iQWflfiVfi.‘iGfi’b‘*‘fi"lifl#&‘\il&l*l’i*“llifl‘#'il‘lb*1“1
oy

UNPACKING, INSTALLATION, AND OPERATION

2.1

2.2
2.2.1

INSTALLATION. ...ttt ceerrcceneieeessseessssnsssesesssssassssssensnsnesssnsnseo ]
Preliminary CheCKS ....c.uuiiiiiiiiiiiiiiiriiiieiiieceriieeeiseeraieseeseessnaesassasesnes ceerrreees 2-1

2.2.1.1

AC Voltage Selection.........coceiiivminniiiiiiiiieiieiiiirinieeeensniieeesresnmssensseees 2=l

2.2.1.2
22.13

Backplane Jumper Positions...........ccccoeeeeiiiririniinieeeneeneeeeeeeesesseenesseeensenn 201
Bezel Assembly Jumper Positions...........cocevvvvvvieeeciiiiiininneeeeneeeenenennnnnn 2
Power Controller Cable Installation .........ccccccoevevieeverrrnveiinicriennnnnnnnnn.
. 2-4
Module Insertion and Removal .........c.cueeivvviiiiiiiiviiireiieereiercnnneesnnes.
226
Module Installation..........cccciiiiiiiiiiiiiiiiiiiiireeeeerereeeeeessssnene
. 220
Mounting the Logic Box Cover in an Equipment Rack ..........ccccovrvrmvvevnnnnnee.. 2-8
Installing the Logic Box Base in the Cover .........cccccooovvvvmiiiiiiireeecennerennnnnnnn
2=12
POWET CONNECLIONS........uiiiiiiiiiiieieeeiiiieeeeriiiiieeeereessisseeessssessesessssnssesasene e 2-14
Installation Verification.........ccccuvuuiiiiiiiiriiniiiiiicneeeericcceeeeeeeesnnaees veeerens v 2-14

22.14

2.2.15
2.2.1.6
2.2.2
223
224
225

23
APPENDIX A

BACKPLANE AND MODULE CONFIGURATION

FIGURES

Figure No.

Title

Page

BA11-N with Front Bezel ..........coouvuiiiiiiiiiiciieeeeeerrre
e
e eeeae e 1-1
BA11-N with Blank Front Panel.............ccouuiiiiiiiiiiiiiiiniienccrcceneeneeeeeenenneenn
122
BA11-N, Logic Box Cover Removed.........cccccoivvviieiiiiriiiiiciieinniiinceesnneneeesnsneeneen
13
BATI-N, Rear VIEW ....c.cuuiiuiiiiiiiitiiiiciiiceiireiciceieeeniencesssensens eerreneeneens errrereneateneanns 1-3
BA11-N System ApPpliCations..........cccevvuiiiiiiiiiiiiiiierieiiiiereerneceir eeeeeseeeeeessssesesenses 1-4
H9270 Backplane ConneCtOrS.........ocvvuuieririieieiriniiiiereiiireereneeeesernneesessssseesesssseranes .1-5

iii

FIGURES (CONT)

Figure No.

Title

Page

Module Installation in the H9270 Backplane.........c...........fesrerosnsesasssentsanstsssntssnate 1-6
H9273 Backplane Connectors.........ccciivuiiiiiiiiieiiiiiiieriiiiieeiie s 1-7
Module Installation in the H9273 Backplane..........ccccovevriiiniiiiiiiiciiiinnininnennn 1-8
AC Loading Violation........reeessssrerensesssonnnanssennaresnannenreniuEesenertserteeersetnaredossannreses 1-9
Power Up/Power Down Timing.......ccccccevviiiiiiiiiiimiiiiiiineiiieieen
i 1-12
H786 Power Supply Minimum Ride-Through After Power Interruptlon TSP O K
BA11-N Voltage Select Switch..........ccccovrvrirviirmiimiiiniii, eeerennees 2-2
Backplane Jumpers ................ Cherebeteeeesateeeeateeeha
ettt eaaaeeethteanaseaerreeaaresstrrseaes 2-3
Bezel Printed Circuit Board..........ccoovviiiiiiiiiiiiiiieccciisiecciicnsscnsiessssiniessseni
e snaees 2-5
Insertion and Removal of Modules Havmg Extractor-Type Handles.................... 2-7
BA11-N Cover Mounting Dimensions........cccooevveiiiiininiiicinninnienneerrrrer
e s eeraanes 2-8
BA11-N Unit Assembly Drawing .......cccoeevuiiiiriiiiiiiiiiiiciiriecceniecea
s seanes 2-9

Power Connections, PDP-11/03L Systems...........cccoverveennnens rreerreeere
e etaeerens 2-15
Power Connections with BA11-M Expander Boxes.........cccccvvieeciiiiiiinmmuiniinnnnne. 2-16

Front Panel Switches and Indicators.........ccccovviiviiiiiiiiniiiiiniinii i, 2-16
Backplane Selector Chart, PDP-11/03 Expansion..........c.coovevevinnninnininiiininneennnnn. A-3
Backplane Selector Chart, PDP-11/03L Expansion ..........ccccccceiiininiiiniiiiiiiieinnnn A-3
Configuration Chart, PDP-11/03L (H9273) ....ccccoooiiiiiiiiiiiiiiiiiiiiiiieinncceeeeeeene, A-4
Configuration Chart, PDP-11/03L (H9273) and BAI11-N (H9273)..ceiviiieeeeeeenanns A-5
Configuration Chart, PDP-11/03L (H9273) and (2) BA11-N (H9273).................. A-7
Configuration Chart, PDP-11/03 (H9270)......cccccccciiiiiiiiinninmniiiiniiiiinieeeeeen, A-9
Configuration Chart, PDP-11/03 (H9270) and BA11-N (H9273) .............eooniii. A-10
Configuration Chart, PDP-11/03 (H9270) and (2) BA11-N (H9273) .................. A-11

TABLES

Table No.
1-1

1-2
2-1

2-2
2-3
2-4
2-5 .

A-1

Title

Page

BA11-N Specifications .......PP
PO PRRPPOPTPPPPPPPPPPR 1-10
BA11-N Power Supply Specification.............cceevvvriiireiiiimiiiiciinniiniin. 1-11
Backplane JUMPETS .........oiiiiieiiiiiiriiiiniiri
e
s s s e 2-4
Bezel ASsembly JUMPETS......cccuuiiiiiiiiiiiiiiiiiiiiiniiiii
i
snassseee 2-5
| 1 o 130 5L P 2-11
LSI-11 Bus Expansion Cable Assemblies ..............ovuecieiinnennieciiiriiiennnnninnninnn
. 2213
BA11-N Front Panel Switches and Indicators........ccccccoivvieiiiiinriiniiiiiiinnieicccnnnnn. 2-17
Option Summary Chart.........cccoovvivieiiiiniiniiii
e A-13

CHAPTER 1
INTRODUCTION

1.1

GENERAL

The BA11-N Mounting Box can be installed in a standard 48.3 cm (19 in) equipment rack. The box is
48.3 cm (19 in) wide, approximately 13.2 cm (5 3/16 in) high, and 57.8 cm (22 3/4 in) deep. It contains
cooling fans, ac input unit, power supply, and a 9-slot backplane that accepts LSI-11 double-height

and quad-height modules. The BA11-N can have a blank front panel or a bezel that is equipped with
operating switches and status indicators. Figures 1-1 and 1-2 show the BA11-N with a bezel and a
blank panel, respectively.

L]
MA-0768

Figure 1-1 BAI11-N with Front Bezel

1-1

MA-0767

Figure 1-2

BA11-N with Blank Front Panel

The mounting box is available for both 115 V and 230 V systems. Because a choice of front panels is
also provided, the user can select any of the following BA11-N models.

Model

Primary Power/Front Panel

BA1I-NC
BA11-ND
BA1I-NE
BA11-NF

115 V /bezel panel
230 V /bezel panel
115 V/blank panel
230 V /blank panel

Figure 1-3 shows the BA11-N with the logic box cover removed. The ac input box, power supply,
and
H9273 logic assembly (which includes the fans and the backplane) are attached to the logic
box base:
the bezel is attached to the power supply. The power supply assembly is hinged to the base and can
be

swung open to expose the internal components; with little effort, the entire assembly

can be removed

from the base and replaced. LSI-11 modules are inserted in the backplane from the rear of the
box
through an access door that is equipped with strain reliefs for LSI bus cables and communicat
ions
cables (Figures 1-4).
When the unit is to be mounted in an equipment rack, the logic box cover is attached to the
rack with
mounting hardware. The logic box base slides into the mounted cover and a spring-button assembly

engages to prevent the base from being pulled out of the cover in error.

H9273 LOGIC ASSEMBLY
(INCLUDES CARD FRAME, BACKPLANE, AND FANS)

AC INPUT BOX

H786 POWER SUPPLY

FRONT BEZEL

MA-0777

Figure 1-3

116V AC
s

BA11-N, Logic Box Cover Removed

@\ 708A

dlilgliltiall

NEPATYPEN
(QA: dliglilt]a]l]

MODEL

1!5 VOLTS
12 AMPS | BA11-NC
50-60 HERTZ | 1 PH | 3WIRES | SN:

MAX. A. C. OUT
6A@ 115V

3A @230V

MA-0745

Figure 1-4

BAI11-N, Rear View

1.2

BAI11-N APPLICATIONS

The BA11-N can be used in several ways: as the mounting box for a PDP-11/03L system, which
consists of a KD11-R microcomputer, a BDV11-A (terminator, boot, and diagnostic module), and
other LSI-11 modules that the user might select; as an expander box for an existing PDP-11/03L
system; and as an expander box for a PDP-11/03 system (refer to the 1977-1978 Microcomputer Handbook for a description of this system). Figure 1-5 illustrates these possibilities and includes interconnecting cable designations. Notice that an LSI-11 system can include as many as three backplanes,
i.e., one in the main box, which contains the central processor unit (CPU), and one in each expander
box. Each expander of a PDP-11/03L system is physically indentical to the main box, with the possible
exception of the front panel (usually, only one bezel per system is desired); however, the BA11-N
differs in height from the PDP-11/03 and the BA11-M expander box.

LSI-11

LSi-11

LSI-11

PDP11/03

PDP11/03 1L

(BA11-M)

(BA11-N)
|

|
BCV1B

BCviB

|
!
BCv1B

CABLE

4
BA11-M

BA11-N

EXPANDER BOX

BA11-N

EXPANDER BOX

|
|

BCV1A

CABLE

-—l
|

EXPANDER BOX

‘

BA11-N

EXPANDER BOX

]

|
|

BA11-N

J':
|

BA11-N

EXPANDER BOX

I|
|

NOTE:
DOTTED LINES REPRESENT

OPTIONAL EXPANSION
MA-OT739

Figure 1-5

BA11-N System Applications

1.3

LSI-11 BACKPLANES

The BA11-M mounting box uses the H9270 backplane. The connectors that comprise this backplane
are arranged on an etched circuit board in four rows, each row containing two 72-pin connectors
(Figure 1-6). A connector has two slots, each of which contains 36 pins, 18 on either side of the slot.
Most of the pins of slot A, row 1, are etch-connected to corresponding pins not only in slot C, row 1,
but also in slots A and C of rows 2, 3, and 4. For example, pin D, slot A, row 1 is common with pin D,
slot C, row 1, as well as with pin D in slots A and C of rows 2, 3, and 4. Most of the pins of slots B and

D are interconnected (bused) in the same way. (Refer to Chapter 3 of the 1977-1978 Microcomputer
Handbook for instructions on identifying individual slot and module pins.)

CONNECTOR 1
'

SLOTSB

SLOT A

CONNECTOR 2
e

SLOTC

SLOTD

ROW 2

ROW 3

ROW 4

VIEW IS FROM MODULE SIDE OF CONNECTORS
MA-0734

‘Figure 1-6

H9270 Backplane Connectors

LSI-11 modules are mounted in the backplane by inserting the module finger connectors into the
backplane slots. If the module is double height, module connector A (the right-most connector when
viewing the component side of the module with the module fingers pointing down) is inserted in slot A
or C of the backplane, and module connector B is inserted in slot B or D. A quad-height module has its
A through D connectors inserted in slots A through D, respectively. The LSI-11 bus signals are present
on the pins of slots A and B; the same set of bus signals is present on the pins of slots C and D.
However, priority considerations and the fact that some connector pins are not bused result in certain
restrictions on module placement (refer to the 1977-1978 Microcomputer Handbook for details). In
general, modules should be installed in the backplane as illustrated in Figure 1-7. That is, the CPU
module must be placed in the top row and the options must be placed to reflect their assigned priorities
(option 1 has the highest priority). There must be no empty option locations between the CPU and
options that use either the interrupt acknowledge signals or the direct memory access (DMA) grant
signals of the LSI-11 bus.

ROW 1

CPU

ROW 2
ROW 3

SLOTC

OPTION 2
|

ROW 4

3
B
B

SLOT D

SLOTB

SLOTA

MODULE

OPTION 1

OPTION 3

OPTION 4

OPTION 6

OPTION &

VIEW IS FROM MODULE SIDE OF CONNECTORS
MA-D735

Figure 1-7

Module Installation in the H9270 Backplane

It is apparent that at times the utility of the H9270 backplane decreases when quad modules are
inserted; i.e., a quad module uses four backplane slots even though it can take all the bus signals it
needs from just two of these slots. Furthermore, the individual modules of multiple-module options
must be connected with over-the-top connectors, which consume board space that could otherwise be
occupied by circuit components. The new H9273 backplane has a unique design that overcomes these

deficiencies.

The H9273 backplane is used in the BA11-N mounting box. The connectors that comprise this backplane are arranged in nine rows, each row containing two 72-pin connectors (Figure 1-8). As in the
H9270 backplane, a connector has two slots, each of which contains 36 pins, 18 on either side of the
slot.
|

LSI-11 modules are inserted (physically) in the H9273 backplane in the same way as they are in the
H9270 backplane. However, the H9273 is wired differently and provides unique advantages; this
uniqueness also results in more restrictions on module placement.

The connectors designated “Connector 1” in Figure 1-8 are wired (etch connections) in parallel. When
a CPU is inserted in slots A, B, C, and D of row 1, slots A and B carry the LSI-11 bus signals
(alternatively, the bus signals can be continued from an earlier backplane by an interconnecting double
module inserted in slots A and B); thus, slots
A and B are termed the LSI-11 bus slots. The connectors
designated “Connector 2” are not wired in parallel, except for +5 V and ground, and (other than +5 V
and ground) have no connections to the LSI-11 bus. Rather, C- and D-slot pins in each row are
connected to C- and D-slot pins in adjacent rows. For example, pins in row 4 are connected to pins in
row 3 and row 5. If one puts a module in the
C and D slots in rows 3, 4, and 5, and if the fingers on the
module connectors are jumpered properly, a 3-row bus is formed. Buses of varying lengths can be
formed by correctly wiring the modules that make up a module set; hence, slots C and D are termed
the CD bus slots.

1-6

,!‘/M

CONNECTOR 1

CONNECTOR 2

SLOTA

SLOTSB

SLOTC

SLOTD

ROW 1

[

ROW 2

[

;

]

{

}

[

)

[

y |

1 |

[

|| t

)

Row3 |

f
,

ROW 4

" Rows | I

)

——

—

ROWE

[

‘

[

{

[

ROW 7

]

ROW S

}

{

}

3|k

Rowg |

VIEW IS FROM MODULE SIDE OF CONNECTORS.
MA-0740

Figure 1-8

H9273 Backplane Connectors

Figure 1-9 illustrates a possible configuration of modules in an H9273 backplane. LSI-11 doubleheight modules are inserted in LSI bus slots A and B (if one or more of the LSI modules happened to
be quad modules, one or more of the CD bus option modules would have to be removed). Two CD bus
options are depicted. The option designated option 1 consists of two double modules and one quad
module that interfaces the CD bus to the LSI-11 bus; while that designated option 2 consists of three
double modules and one quad module that interfaces with the LSI bus. The BA11-N Mounting Box
Technical Manual describes the H9273 backplane in detail and provides more information concerning
CD bus module design.

CAUTION

Quad modules that use LSI-11 bus signals must take

these bus signals only from slots A and B of the backplane. The single DIGITAL option that does not satisfy this requirement is the MMYV11 which,
consequently, cannot be used in the H9273 backplane.

1-7

ROW 1

SLOT B

SLOTC

SLOTD

CENTRAL PROCESSOR UNIT

ROW 2

LSI-11 OPTION 1

CD BUS OPTION 1

mw 3

LSI-11 OPTION 2

CD BUS OPTION 1

ROW 4

CD BUS OPTION 1

ROW 5

LSI-11 OPTION 3

ROW 6

ROW 7

CD BUS OPTION 2

LSI-11 OPTION 4

ROW 8
"ROW 9

SLOT A

R
R

1
1

- LSI-11 op'no& 5
|

BDV11-A

CD BUS OPTION 2

CD BUS OPTION 2
(BUS TERMINATOR) MODULE

VIEW IS FROM MODULE SIDE OF CONNECTORS
MA-0746

Figure 1-9

Module Installation in the H9273 Backplane

1.4 MODULE LOADING OF THE LSI-11 BUS
When organizing a system, one must give particular attention to three characteristics of each module,
namely, bus ac loading, bus dc loading, and power consumption. Bus ac loading refers to the dynamic
impedance that an element presents to an LSI-11 bus signal line. This impedance, which is due to etch
runs, receiver input loading, and driver output loading, causes a reflection to occur when a step is
placed on the signal line. This reflection manifests itself as a spike that occurs just after an asserting or
negating edge. If too many elements are placed on the bus, the total impedance presented to a particular signal line can produce a reflection of unacceptable magnitude; thus, a false logic signal that might

cause a failure is created. Such a false logic signal is illustrated in Figure 1-10, which shows the threshold level of an 8640 bus receiver being crossed twice because of the lumped-load reflection.
Bus ac loading is described in terms of ac loads, an ac load being defined as 9.35 pF (nominal) of
capacitance. The ac load rating of a bus element is based on the largest of the capacitances that the
element presents to the BDOUT, BDIN, BRPLY, BSYNC, BREF, and BSACK signal lines. For
example, if the element presents two ac loads (approximately 18.7 pF) to the BDIN line and four ac
loads (approximately 37.4 pF) to the BSYNC line, the element is rated at four ac loads.
|
In a single-backplane system, the bus can support 20 ac loads with the termination that is available on
the processor module. If the other end of the bus is terminated with 120 Q, the number of ac loads can
be increased to 35. Keep in mind that this applies only to the system with one backplane; if the bus is
extended off this backplane in any way, a multiple-backplane system results and the rules change.
Incidentally, the backplane, itself, loads down the bus; consequently, the ac loads attributable to the
backplane must be added when determining the total ac load. AC loads for LSI-11 modules are listed
in the Option Summary Chart, Table A-1, along with backplane configuration charts that also appear
in Appendix A.

1-8

‘

__ __ 8840 RECEIVER
THRESHOLD

IER—————

DRIVER WAVEFORM
|

REFLECTION FROM

NET WAVEFORM

LUMPED LOAD

AT RECEIVER
MA-0741

Figure 1-10

AC Loading Violation

Bus dc loading refers to the dc leakage current that an element presents to an LSI-11 bus signal line
when that line is high (undriven). If too many elements are placed on the bus, the quiescent (undriven)
voltage may be lowered to such a level that bus receivers become susceptible to reflections from lumped loads; furthermore, the overall noise margin on the high end (bus undriven) may become too
small.

Bus dc loading is described in terms of dc loads, a dc load being defined as 105 uA (nominal) of leakage
current (105 uA is the total of 80 uA of receiver leakage current and 25 uA of driver leakage current).
The dc load rating of a bus element is not based strictly on the signal line that has the greatest leakage
(e.g., dc leakage is less important on BDAL lines than on the BSYNC line); hence, the dc load for an
element should always be obtained from the specification for that element.
In both single- and multiple-backplane systems, the maximum number of dc loads allowed is 20 (backplanes have zero dc loads). DC loads for LSI-11 modules are listed in the Option Summary Chart,
Table A-1. Loading for customer-designed modules will have to be determined by calculation of receiver and driver leakage currents.
|

Power consumption refers to the amount of current that must be provided by the power supply associated with each backplane. The total current to be drawn from the +5 V source must be determined
separately from that to be drawn from the +12 V source. Naturally, each total must be less than the
maximum rated output current for that source.
‘The amount of current required by each LSI-11 module is listed in the Option Summary Chart, Table
A-1. The current loads are given in values that are typical; thus, the total current needed by the system
modules is typical rather than maximum. To allow for atypical amounts of current that might be
drawn by individual modules, observe this rule of thumb: keep the amount of current to be drawn
from a power supply to 70 percent, or less, of the supply’s maximum rated current.

It is evident that the effects of bus loading and power consumption must be considered when a system
configuration is devised. Appendix A contains not only an Option Summary Chart, Table A-1, and
backplane configuration diagrams, but also a number of rules and guidelines concerning the configuration of LSI-11 modules. Refer to this appendix when planning and/or installing a system.

1.5

SPECIFICATIONS

Tables 1-1 and 1-2 list significant BA11-N mounting box specifications.

Table 1-1

BA11-N Specifications

Item

Specification

Dimensions (including bezel)
Width
Height
Depth (without mounting brackets)
Depth (with mounting brackets)

48.3 cm (19 in)
13.2 cm (5.19 in)
57.8 cm (22.75 in)
67.96 cm (26.75 in)

Weight (without modules)

20 kg (44 1b)

Operating Temperature*

5° C-50° C (41° F-122° F)

Operating Humidity

10%-95%, with a maximum wet bulb temperature
of 32° C (90° F) and a minimum dew point of 2° C
(36° F)

Input Voltage

115 Vac
ND/NF)

Input Current**

12 A, Max (BA11-NC/NE), 6 A, Max (BAllND/NF)

Circuit Breaker Rating

15 A @ 115 Vac or @ 230 Vac

(BA11-NC/NE),

230

Vac

(BAlIl-

*The maximum allowable operating temperature is based on operation at sea level, i.e., at 760 mm Hg (29.92in
Hg); maximum allowable operatmg temperature will be reduced by a factor 0f 1.8° C/ 1000 m (1.0° F/1000 ft)

for operation at higher altitude sites.
When the aqmpment is bemg operated at the maximum allowable temperature air flow must maintain the inletto-outlet air temperature rise to a maximum of 7° C (12.5° F).

**Input current consists of that used by the BA11-N, itself, plus whatever current is supplied via the convenience
ac outlet (J3) to an expander box; the total current must be less than the maximum specified.

1-10

Table 1-2

BA11-N Power Supply Specification

Item

Specification

Current Rating

5.5A@ 115 Vrms
2.7A @ 230 Vrms

Inrush Current

100 A, peak, for 1/2 cycle at 128 Vrms or 256 Vrms

Apparent Power

630 VA

Power Factor

The ratio of input power to apparent power shall
be greater than 0.6 at full load and low input voltage.

Output Power

Power Up/Power Down
Characteristics

Static Performance
Power Up

Power Down

Dynamic Performance (Figure 1-11)
Power Up

+5 Vdc, £250 mV, @22 A (A minimum of 2 A of
+5 Vdc power must be drawn to ensure that the
+12 Vdc supply regulates properly; however, the
+ 12 Vdc output will not go above 12.6 Vdc no matter what +5 Vdc current is drawn).

412 Vdc, £600 mV, @ 11 A

BDCOK H goes high : @ 75 Vac
BPOK H goes high : @ 90 Vac
BPOK H goes low : @ 80 Vac
BDCOK H goes low : @ 75 Vac

3 ms (min) from dc power within specification to
BDCOK H asserted.

70 ms (min) from BDCOK H asserted to BPOK H
asserted.

Power Down*

4 ms (min) from ac power off to BPOK H negated.

4 ms (min) from BPOK H negated to BDCOK H
negated.

5 us (min) from BDCOK H negated to dc power
out of specification.

*Figure 1-12 shows power interruption ride-through characteristics for the H786 power supply used in the PDP11/03L.

4 MS (MIN)

3Ms (MIN) —»|

AC INPUT

70 MS

(MIN)

/ l

£¢

BPOK H

..‘

\ |

e 5.5 (i)

I ‘ I

[

I
BDCOK H

}

| |

4 MS (MIN)

| |

;
DC OUTPUT

’

[*—ceavence

[e—— ceavence

MA-0764

Figure 1-11

Power Up/Power Down Timing

1-12

130
~

BDCOK H

AC INPUT VOLTAGE (VOLTS)

1204
BPOK H
DC VOLTAGE
DROP-OUT

110 -

TO OBTAIN TIME FOR PARTIAL

LOADING MULTIPLY BY THE RATIO

OF FULL OUTPUT POWER TO

100
~

PARTIAL OUTPUT POWER, E.G.,
t (1/2 LOAD) = t(FULL LOAD X 100%/50%

4.8 ms

TIME(MILLISECONDS)
MA-0761

Figure 1-12

H786 Power Supply Minimum Ride-Through
After Power Interruption

1-13

1.6 RELATED DOCUMENTS
The following DIGITAL publications contain information for the BA11-N user.

Publication

Document

BA11-N Mounting Box
Technical Manual

EK-BA11N-TM-001

In microfiche library;* Available in
hard copy**

BDVI11-AA Technical Manual

EK-BDV11-TM-001

In microfiche library; Available in
hard copy**

BDV11-AA User’s Guide

EK-BDV11-UG-001

Not in microfiche library; hard copy
ships with device: available in hard
copy**

Number

Remarks

1977-1978 Microcomputer Handbook
(2nd Edition)
|
EB-07948-53/77

Available in hard copy**

PDP-11 Software Handbook

Available in hard copy**

General information concerning educational and maintenance services provided by DIGITAL, as well
as equipment warranty statements, can be found in the 1977-1978 Microcomputer Handbook.

*For information concerning microfiche libraries, contact:
Digital Equipment Corporation
132 Parker St.
Maynard, MA 01754
ATTN:

Micropublishing Group
PK3-2/T12 -

**These documents can be ordered from:
Digital Equipment Corporation
444 Whitney St.
Northboro, MA 01532
ATTN:

Communications Services (NR2/M15)
Customer Services Section

CHAPTER 2
UNPACKING, INSTALLATION, AND OPERATION

2.1 UNPACKING
.
The BA11-N is shippedin a protective box. Remove the BA11-N from the box and visually ms:pect for
damage. Save the shlppmg cartons and packaging materialsin case it is necessary to return the unit for
service.

2.2 INSTALLATION
Physical installation of the system can begin when the shipment has been unpacked and checked for
completeness. This paragraph gives instructions for setting up the system. The user might consider, at
some time, to either add to an existing system or create a new system. If so, check the appendix, which
contains important information concerning backplane and module configuration.
2.2.1
Preliminary Checks
Before installing the logic box base, check the features described here.

2.2.1.1
AC Voltage Selection - The BA11-N can be used with line voltage of either 115 Vac or 230
Vac. Only the ac line cord is different for the two voltages. However, a voltage sclecting switch must be
set to a position that corresponds to the line voltage being used. This switch is located on the rear of
the ac input box, above the circuit breaker (Figure 2-1) The switch lever protrudes through a plate that
is attached to the box. If the line voltage being usedis 115 Vac, the dcmgnatmn “115 Vac” should be
printed on the plate above the switch lever. If the printing on the plateis 230 Vac, remove the plate.
Flip the plate over and notice that 115 Vacis printed on the opposite side; also, notice that the switch

lever itselfis imprinted with 230 Vac. Move the switch lever down; 115 Vac should appear on the top of

the lever. Replace the plate over the switch lever so that the printing on the outside of the plate says 115
Vac (when the plateis on, the printing on the switch lever cannot be seen). The plateis fabricated so
that the screw holes in the plate and the input box line up only when the switch position corresponds to
the printing on the outside of the plate.

2.2.1.2 Backplane Jumper Positions - There are three
Jumper
j
pasxtwns W1, W2, and W3, on the
H9273 backplane (Figure 2-2). Jumpers are installed in all three positions when the backplane is
manufactured. Table 2-1 summarizes the conditions under which jumpers should be inserted or removed.

The jumper in position W1 is involved with CPU event interrupts. These interrupts can be initiatedin
two ways. First, an external (to the BA11-N) signal source can be used to pull the LSI-11 bus BEVNT
L line low; in this case, the jumper in W1 of each H9273 backplanein the system would have to be
removed. Seccnd the LTC signal generatedin the H786 power supply can be used to pull the BEVNT
L line low, thereby initiating vectored interrupts at a rate that depends on the BA11-N line frequency.
W1 connects the LTC signal to the BEVNT L line; hence, in this case, the jumper would be left in
position W1 of the H9273 backplane. In a multiple-box system, the box containing the M8012 module
(i.e., the last box in the system) must be the source of the LTC signal; thus, the W1 jumper must be
inserted in the backplane of this box and must be removed from the backplane of the other box(es).

2-1

708A

VOLTAGE
SELECT
SWITCH —_ ||

NEPA TYPE II

115V
AC

C¥dlilgliltlall

/
MA-0743

Figure 2-1

BA11-N Voltage Select Switch

5 * .mvmw Al :

oTSLRO

@Nm5fi.d&*
*

MA-0747

Figure 2-2

Backplane Jumpers

2-3

Table 2-1
Jumper Position

Backplane Jumpers

Jumper(s) In

Jumper(s) Out

When the H786 power supply gen-

erated LTC signal is used to assert
the LSI-11 bus BEVNT L signal.
|

W2, W3

When a quad KDI1 CPU is inserted in row 1 of the backplane.

When it is not desired to have line

time clock (LTC) sourcing BEVNT L,
such as when an external source is
used instead.

When any other module is installed in
row 1, i.e., when the backplane is part

of an expander box.

The jumper in W2 connects CK
1 to CL1 in row 1, while the jumper in W3 connects DK
1 to DL1, also
in row 1. These jumpers must be inserted whenever a quad KD11 CPU resides in row 1 of the first box.
All three of these jumpers can be inserted and removed without any need for disassembly, other than
removing the logic box base from the cover.
|
2.2.1.3 Bezel Assembly Jumper Positions - There are four jumper positions, W1, W2, W3, and W4, on
the printed circuit board of the bezel assembly (Figure 2-3). When the board
is manufactured, jumpers
are inserted in positions W1, W2, and W4; position W3 is left blank. Table 2-2 describes the conditions
under which jumpers are inserted or removed.
|

2.2.1.4

Power Controller Cable Installation - In an extensive system, it is convenient to be able to turn

on the power to each unit from a central point, rather than turning
on each unit individually. This can
be done by incorporating a power controller (such as the DIGITAL 861-C model) into the system. The
power conroller is plugged into the ac main and each unit is plugged into the “switched” outlets on the
controller. If each unit’s ON/OFF switch is kept in the ON position, the ON/OFF switch on the
power controller can be used to apply and remove power for all system units simultaneously.

Furthermore, the power controller ON/OFF switch can be configured so that power control can be
effected from some other location, e.g., from the AUX ON/OFF switch of the BA11-N bezel. (Paragraph 2.2.4 shows possible power connection schemes for the PDP-11/03 and PDP-11/03L systems.)
If the user intends to incorporate a power controller into the system and wishes to use the bezel AUX
switch to turn system power on and off, a twisted-pair cable is available. The Mate-N-Lok TM connector on this cable is plugged into J2 of the bezel assembly printed circuit board (Figure 2-3). The
open end of the cable can then be connected to the power controller ON/OFF switch so that the two
switches are in parallel. If the controller switch is kept open, the AUX switch can control system power
application.
If the cable is not already installed in the bezel assembly, plug the connector into J2 of the assembly
printed circuit board. Route the cable down the left side of the unit and out the rear under the nearer
cable strain relief.

TMMate-N-Lok is a trademark'of AMP, Inc.

SIDE 2

O===0 O

O*&;&gfl*@
O

SWITCH CONTACTS

)

LED CONTACTS

(RUN, PWR OK)

(83, 82, 81)

NOTES:

1. VIEW IS FROM THE REAR OF THE BEZEL
WHEN THE BOARD IS MOUNTED ON
THE BEZEL.

2. JUMPERS ARE MOUNTED ON SIDE 1.
MA-0737

Figure 2-3

Table 2-2
Jumper Position
Wi,

Bezel Printed Circuit Board

Bezel Assembly Jumpers
Jumper Out

Jumper In

When the bezel AUX ON/OFF

switch is used to control the power
supply generated LTC signal (when
the switch is in the AUX ON position, LTC-initiated interrupts are

When the bezel AUX ON/OFF
switch is used to turn the system
power controller on and off (Paragraph 2.2.1.4).

possible).

When the bezel is to be mounted on

an expander box (W3 permits the
HALT switch to light the RUN in-

When the bezel is part of the main
box, i.e., the CPU is mounted in this
bezel’s backplane.

dicator).
w4

When the bezel is part of the main

box (W4 enables the S RUN L signal to light the RUN indicator).

2-5

When the bezel is mounted on an expander box.

2.2.1.5 Module Insertion and Removal - Modules must be inserted and removed only when the power
is turned off. Use the front panel AUX ON/OFF switch or the ON/OFF switch on the rear of the ac
input box to turn off the power (refer to Paragraph 2.3 for a description of each of these switches).
Some quad modules are equipped with metal extractor-type handles that facilitate module insertion
and removal. When inserting such a module into the backplane, begin by sliding the module, component side up, into the card guides. Slide the module all the way in and just start the module connector fingers into the backplane connectors. Fit the prongs of the handles into the holes in the card

frame, as shown in Figure 2-4. Press in on both handles simultaneously to fully insert the fingers in the
backplane connector.
To remove a module, pull both handles out simultaneously until the prongs of the handle are clear of
the holes in the card frame. The module fingers will now be nearly free of the backplane connector and
the module can be removed easily.

CAUTION
Modules and/or the backplane assembly might be
damaged if modules are inserted and removed with
the power on, or if the modules are inserted upside
~ down.
~
2.2.1.6 Module Installation - The equipment is shipped from the factory with the modules installed.
Bus cables and communication cables must be connected to the modules, if not already in place. When
‘removing modules to connect cables, or when installing new modules in an existing installation, follow
these guidelines:
1.

Ensure that double-size modules are inserted correctly in the backplane; i.e., LSI-11 bus
modules plug into slots A and B (the two left-most slots), CD bus modules plug into slots C
and D, and both types must be inserted right-side up.

The CPU can be inserted only in bus position 1 of the H9273 backplane (‘‘bus positions” are
defined in the backplane selector charts, Figures A-1 and A-2).

An M8012 module (BYD11-A) must be inserted only in the last bus portion of the last box
(if the module is not in the last bus position, the diagnostic light display cannot be seen).
Ensure that jumper W1 is in place in the backplane of the last box; other backplanes must
have the jumper removed (Paragraph 2.2.1.2).

Ifa module uses the LSI-11 bus grant and interrupt signals (BDMGI L/BDMGO L and

BIAKI L/BIAKO L, respectively), there must be no empty LSI-11 bus positions between
the module and the CPU, although empty CD bus positions are permitted.

Always ensure that modules are seated firmly and securely in the backplane.

The +5 Vdc regulated voltage is rated at 22 A, full load, while the +12 Vdc regulated
‘voltage is rated at 11 A, full load. When installing new modules in a system backplane, take
care not to exceed the full-load limits. Table A-1 lists LSI-11 modules, their power requirements, and their sizes.
|

2-6

TO REMOVE MODULE

N
EXTRACTOR-TYPE HANDLE

\ TO INSERT MODULE

MODULE

CONNECTOR
FINGERS

—

BACKPLANE CONNECTOR
MA-0755

Figure 2-4

Insertion and Removal of Modules Having Extractor-Type Handles

2.2.2 Mounting the Logic Box Cover in an Equipment Rack
|
Use the following procedure to mount the logic box cover in an equipment rack. Figure 2-5 shows the
mounting dimensions and illustrates the cover mounted to the four cabinet uprights. The item callouts
in Figure 2-5 and in the following mounting procedure are identified in the unit assembly drawing,
| Figure 2-6, and its associated parts list, Table 2-3.

CAB. UPRIGHTS
REF

63.5 CM

(25.00 IN.) REF

‘

29 (QTY 8) REF

12 (QTY 2)

46.5 CM

)

(18.31 IN.) REF

‘

‘
N\

3.73CM

‘

(1.47 IN)

]

13.18 CM
20

(5.19 IN)

|
3 1} (QTY
8) RE F

5.71 CM

(2.25IN.)
MA-0776

Figure 2-5

BA11-N Cover Mounting Dimensions

2-8

SEE DETAIL "B"”

. LEGEND

~ VARIATION

NUMBER

0000
000 0000

BA11-NC
BA11-ND
BA11-NE

| BA11-NF

— PHASE/WIRE| VOLTS

2A |
6A
2/

SINGLE/3 | 115V | 50/60 HZ | BEZEL ASSY/SWITCHES
SINGLE/3
230V | 50/60 HZ | BEZEL ASSY/SWITCHES
SINGLE/3
115V _| 50/60 HZ2 | BEZEL, BLANK

ssE‘GLE/3

230V | 50/60 HZ | BEZEL, BLANK

TO J5 OF H786

PWR SUPPLY

AT\ oAF\ecoaaca

FAN #2

P4 REF
:

]

TO (J8) OF H9273

/‘? LOGIC ASSY

23 SHI PPING
SCREW

FAN #1

SEE DETAIL "A”
16

FOR VARIATION
-NC & -ND ONLY
MA-0774

DETAIL “B”

Figure 2-6 BAI11-N Unit
Assembly Drawing

2-9

Table 2-3

Parts List
QI

Item

No.

Part No.

Description

Brkt Bezel Mtg

2
3
4
5
6
7
8
9
10
11
12
13
14

Bezel Assy with Switches
Bezel Blank
17-00083-02 | Line Cord (115 V), USA
17-00090-00 | Line Cord (250 V), USA
Base, Logic Box
Door Assy
Logic Assy (H9273)
AC Input Box (H403-A)
Pwr Supply Assy (H786)
Clamp, Hinge
Brkt Support
90-06035-01 | Scr PHL Hd Pan No. 8-32X.25
90-06634-00 | Washer, Lock No. 8

Harness ac Power

16
17
18
19
20
21
22
23
24
25
26
27
28

29
30
31
32
33

1% % | %
1=1=1=1=

Z.g

2121

1
1]
-1
-1
-11
1
1]
-1
1]
-1
11
-11
1
1
1
1
1
1|1
1
1
1
1
1
1
1
1
1
1
1
1
1
2121
21
2
2121
2
2
12 (12
|12 (12
21
|21
|21
|21
1

Cable Console

2-11

1
|1
1
1
1
1
1
1
1
2121
21
2121
21
2121
21
1
1
1
91911
91
1
1
1
212121
21211
2]
1
1
1
3131
21

8|1
8|
81
1
1

8|
8
8|
1]
1|

8]
8]
8|
-1
-1

1
1
1
2
2
2
1
9
1
2
2
1
2

8
8
8
-

When the unit is shipped, the logic box cover is held to the base by four screws (these are
used onlyin nonrack-mounted apphcatmns) and a single shipping screw, which, for safety,
must bein place whenever the unit is moved or shipped. First, remove the four screws (Item
13) that attach the cover to the base; then, open the rear door (Item 7) and remove the
shipping screw (Item 23).
|

A safety locking device is found on the right side of the unit (when looking at the front). This
device, a spring-button assembly (Item 24), is attached to the side of the ac input box. When
the unit is closed, the button on this assembly fits into the rear hole of two holes in the right
side of the cover. This mechanical interlock can be overridden by pushing the button in from
the outside of the cover while, at the same time, pulling out the logic box base to get the
button past the hole. The base can then be pulled out of the cover to its extended position; at
this position, the button pops into the front of the two holes, preventing the base from being
inadvertently pulled entirely out of the cover. Open the base to the extended position and
then release the button from the front hole. Slowly pull the base entirely out of the cover and
set the base out of the way.

Attach the Tinnerman nuts to the cabinet uprights in eight places as indicated above.

Mount the cover (Item 18) to the front cabinet uprights using four pan head screws No. 1032 X 0.62 LG (Item 31), and four No. 10 flat washers (Item 30).
Attach the two support brackets (Item 12) to the cover using four Phillips pan head screws
No. 8-32 X 0.38 LG (Item 23), and four No. 8 lock washers (Item 14).

Attach the support brackets (Item 12) to the rear cabinet uprights using four Phillips pan
head screws, No. 10-32 X 0.62 LG (Item 31), and four No. 10 flat washers (Item 30).

Slide the unit into the cover. It will be held in place by the spring button (Item 24). To slide
the unit forward again it will be necessary to release this spring button.
If the system is to be moved or shipped, the shipping screw (Item 23) must be replaced.

2.2.3 Installing the Logic Box Base in the Cover
Set the rear of the logic box base on the support flanges of the cover and slide the base in until the
spring-button assembly engages in the extended position. Take care not to pinch the cables while
sliding the base in. Release the spring button and push the base all the way in until it engages in the

closed position. Take the following steps to complete the installation.

Note
The base being installed is either the main base, i.e.,
the one containing the CPU, or an expander base
(two expander boxes can be added). Modify the following instructions to suit the kind of base you are
installing; e.g., if there is a blank front panel, skip
the first half of Step 1.
l.

Put the AUX switch on the front panelin the OFF
ac input boxin the OFF position.

2-12

position; put the ON/OFF switch on the

When the AUX switch on the front panel is in the ON position, the two wires of the power
controller cable are common (Paragraph 2.2.1.4). Connect the free end of the cable to the
input circuit of the power controller so that the AUX switch controls the application of
primary power to the controller. Keep the AUX switch in the OFF position.
Loosen the cable strain reliefs and open the rear door of the box to install the LSI-11 bus
expansion cable assemblies. Two cable assemblies are used. Table 2-4 describes the assemblies and tells where to insert the assembly modules (Figures A-4 through A-8 illustrate
module placement). When inserting the modules, make sure the connectors are on top.
‘Close the rear door; bring the bus cables out under the left strain relief and the communication cables out under the right strain relief. Adjust the strain reliefs so that the cables are
held firmly but are not pinched or crushed. Secure the strain reliefs and the rear door. Make
sure the cables will not bind when the base is pulled out to the extended position.

Table 2-4
Assembly

BCV1B-XX

LSI-11 Bus Expansion Cable Assemblies

Assembly Composition

Two BCOSL-XX cables

One M9400-YE module

Insert Modules In
Slots A and B of the first open row after all other
LSI-11 bus options have been installed in the main

box.

BCVIA-XX

One M9401 module

Slots A and B of row 1 of expander box 1.

Two BCO5L-XX cables

Slots A and B of the first open row after all other

One M9400-YD module

LSI-11 bus options have been installed in expander

box 1.

One M9401 module

Slots A and B of row 1 of expander box 2.
NOTE

«_XX” in the cable assembly number denotes length,
which can be 2,4,6, or 10 ft (each cable of an assembly is the same length.) When both assemblies are
used in a system (three boxes), the lengths must
iffer by 122 cm (4 ft). To facilitate servicing, the
BCV1B cables should be 183 cm (6 ft) long, while the
BCVI1A cables should be 305 cm (10 ft) long.

2-13

2.2.4 Power Connections
'
The individual mounting boxes of a multiple-box system can be connected to a power source in different ways. Figure 2-7 shows how one might connect the boxes in typical PDP-11/03L systems involving

only BA11-N mounting boxes. In Figure 2-7a the first expander box gets primary power from the ac
outlet (J3) on the main box, which can be connected to a switched or unswitched source. If the source
is switched, the ON/OFF switch on each ac input box is left in the ON position and power is controlled by the source ON/OFF switch; if the source is unswitched (an ac wall outlet, for example), the
ON/OFF switch on the ac input box of the PDP-11/03L controls power to the first two units (the
ON/OFF switch of the first expander is left in the ON position). Because of power limitations, the
second expander box cannot receive power from the ac outlet on expander box 1; instead, J2 of expander box 2 must connect to the external power source.
~
In Figures 2-7b and 2-7c, each BA11-N is connected to a power controller; however, the controller is
turned on and off from different locations. That is, in Figure 2-7b the switch that turns power on and
off is located on the power controller or is at some place external to the controller. In Figure 2-7c, the
switch that turns power on and off is the AUX ON/OFF switch on the PDP-11/03L front panel.
Figure 2-8 illustrates how to connect typical systems that use both BA11-M and BA11-N mounting
boxes. In Figure 2-8a, a BAI11-N is shown as an expander to an existing PDP-11/03 system that
consists of two BA11-M mounting boxes (refer to the 1977-1978 Microcomputer Handbook for information concerning power installation of BA11-M expander boxes). As in Figure 2-7b, ac power is
controlled from the power controller or from an external source.
The system depicted in Figure 2-8b, shows a PDP-11/03 system being expanded by two BA11-M
expander boxes. Such a system can arise when a user with an existing PDP-11/03 (BA11-M box)
system wishes to expand with the larger capacity BA11-N mounting boxes. By purchasing the BA11-N
with a front panel, the user can convert the PDP-11/03 to a PDP-11/03L, controlling the entire system
power as described for Figure 2-7c.

2.2.5 Installation Verification
|
When the installation is completed, check the operating condition of the equipment. This is a relatively
- easy task if the system is a PDP-11/03L. This system includes a BDV11-A terminator, boot, and
diagnostic option. When the PDP-11/03L system power is turned on, or when the system is restarted,
diagnostic programs implemented by the BDV11-A are automatically started and carried out. These

diagnostics verify the operation of a number of options that the user might have in his system. The

diagnostic package is contained in the PDP-11/03L print set, M00486. Refer to the BDV11-A User's
Guide for operating instructions.

Options that are not checked by the BDV11-A option have a separate diagnostic program available.

Refer to Section 4 of the 1977-1978 Microcomputer Handbook for a description of LSI-11 system
software and for instructions concerning diagnostic programs.
When problems are encountered with system options, refer to the appropriate option technical manual

for instructions. For those problems that are isolated to the BA11-N, itself, refer to Chapter 4 of the
BA11-N Technical Manual, which contains some troubleshooting hints and procedures.
2.3 OPERATION
The BA11-N can have a blank front panel or one equipped with three switches and three indicators
(the control equipped front panel is illustrated in Figure 2-9 - one indicator is not used). Table 2-5 lists
the switches and indicators and describes the function of each.

2-14

J3
PDP11/03L

(BA11-N)

BA1IN
EXPANDER

| 42

BA1IN

EXPANDER

pox

POWER IS CONTROLLED BY
THE AC INPUT BOX ON/OFF
SWITCH OR BY THE ON/OFF

SWITCH OF A REMOTE
SWITCHED SOURCE.

FROM

AUX ON/OFF SWITCH

PDP11/03L

(BA1I-N)

m;m

POWER
CONTROLLER

eppi1/03L
(BA11-N)

POWER

CONTROLLER

jp
l‘Q

EXPANDER

BOX

| o 22313.)5“
BOX

BA1IN

BOX

‘

EXPANDER

POWER IS CONTROLLED BY
THE POWER CONTROLLER
ON/OFF SWITCH (OR BY AN

ON/OFF SWITCH AT SOME

BA11IN

BOX

EXPANDER

POWER 1S CONTROLLED BY
THE AUX ON/OFF SWITCH ON
THE PDP11/03L FRONT PANEL.

EXTERNAL SOURCE).

MA-0759

Figure 2-7

Power Connections, PDP-11/03L Systems

2-15

FROM

AUX ON/OFF SWITCH

J3
PDP11/03

(BA11-M)

PDP11/03L

| J2

(BA11-N)

POWER

BA11-M

POWER

BA11-M

CONTROLLER

EXPANDER BOX

CONTROLLER

EXPANDER BOX

BA11-N
EXPANDER BOX

Jj2

BA11-M
EXPANDER BOX

-«

@ POWER IS CONTROLLED BY

POWER IS CONTROLLED BY

THE POWER CONTROLLER

THE AUX ON/OFF SWITCH ON

ON/OFF SWITCH (OR BY AN

THE PDP11/03L FRONT PANEL.

ON/OFF SWITCH AT SOME
EXTERNAL SOURCE).

MA-0758

Figure 2-8

Power Connections with BA11-M Expander Boxes

)

4
4

)

((o 0 O e [) [} D)

\_
\

PWR OK RUN

RESTART

HALT

AUX ..

MA-0751

Figure 2-9

Front Panel Switches and Indicators

2-16

Table 2-5

Switch

BA11-N Front Panel Switches and Indicators

Indicator

AUX ON/OFF

Function

Can be used for any desired function (switch is
rated at 48 V, 1 A dc). Two specific functions are:

If the BA11-N is wired to control system power,
the AUX switch turns the power on and off; if the
BA11-N is not wired to control system power, the
switch can control the LTC signal, disabling the
signal when the switch is in the OFF position.

HALT

In the down position, the HALT switch forces the

CPU to suspend normal program execution, enables console ODT microcode operation, and permits single-instruction execution. To resume
program execution, return the HALT switch to the
up position and enter a P command from the console terminal (providing the contents of register R7
were not changed; refer to Chapter 2 of the
1977-1978 Microcomputer Handbook for a description of console ODT command usage).

In an expander box, the HALT switch can be used

to light the RUN indicator.

RESTART

When the momentary RESTART switch is acti-

vated, the CPU automatically carries out a power-

up sequence; thus, the CPU can be rebooted at any
time from the front panel.

PWR OK

RUN

The PWR OK indicator lights when the power supply dc voltages are present.

The RUN indicator lights when the CPU is execu-

ting programs.

In addition to the front panel switches and indicators, there is an ON/OFF switch and a primary
voltage selection switch, both on the ac input box. The ON/OFF switch remains in the ON position
when a power controller is used to apply primary power to the BA11-N; if a power controller is not

used, the switch can be used to turn power on and off. Refer to Paragraph 2.2.1.1 for information

about the primary voltage selection switch.

2-17

APPENDIX A

BACKPLANE AND MODULE CONFIGURATION

LSI-11 systems can be classified as either single-backplane or multiple-backplane systems. The electrical characteristics of each system are quite different; hence, two sets of rules have been devised and
must be observed. These rules, which have their basis in bus loading and power consumption, are listed
here and are summarized in the backplane configuration charts that appear later in this appendix.

SINGLE-BACKPLANE CONFIGURATION RULES
1.

The LSI-11 bus can support up to 20 ac loads, i.e., the processor has on-board termination
for one end of the bus; after 20 ac loads, the other end of the bus must be terminated with
|

120 Q.

The terminated bus can support up to 35 ac loads.
The bus can support up to 20 dc loads.

The amount of current drawn from each power supply should be 70 percent, or less, of the
maximum rated output of the supply (Paragraph 1.4).

MULTIPLE-BACKPLANE CONFIGURATION RULES

No more than three backplanes can be connected together.
Each backplane can have no more than 20 ac loads.
The total number of dc loads cannot be more than 20.

Both ends of the termination line must be terminated with 120 Q: i.e., the first backplane
must have an impedance of 120 ©, and the last backplane must have a termination of 120 €.
The cable connecting the first two backplanes (i.e., the main box and expander box 1) must
be at least 61 cm (2 ft) long; a 183 cm (6 ft) length of cable is recommended for ease of
installation.

The cable connecting the backplane of expander box 1 to the backplane of expander box 2
must be at least 122 cm (4 ft) longer or shorter than the cable connecting the main box and
expander box 1; a 305 cm (10 ft) length of cable is reccommended for ease of installation.
The combined length of both cables in a three-backplane system cannot exceed 488 cm (16
ft).

If the cables are customer-supplied, they must have a characteristic impedance of 120 Q.

The amount of current drawn from each power supply should be 70 percent, or less, of the
maximum rated output of the supply (Paragraph 1.4)

A-1

Backplane configuration charts are provided here to help the user observe these configuration rules.
First, one must determine which backplane configuration is best suited for a specific application. Use
the backplane selector charts, Figures A-1 and A-2, to determine this configuration.
The selector charts show configurations that one might want to achieve when beginning with either a
PDP-11/03 or a PDP-11/03L. The backplanes are shown as vertical columns of quad-size module
positions; if the dashed lines are completed, double-size module positions are created. For example, if
you wish to insert a quad module in module positions 3 and 4 of the PDP-11 /03 single backplane,
write in the option type without completing the dashed line. However, if you want to insert a double
module in position 3, complete the dashed line between positions 3 and 4 and write in the option type
in the space allotted to position 3.

The column layout of the backplanes makes it easy to establish interrupt and DMA priorities of the
modules; i.e., the closer to the top of a column a module is placed, the higher is the priority of the
module. Furthermore, the column layout easily depicts the correct placement of cable and termination
modules.

To configure an LSI-11 system, take the following steps.
I.

Choose the type of memory (MOS, PROM, or combination) required for the specific application.

Select the CPU and memory combination most suited for the application (the PDP-11 /03L
uses a KD11-R).

Select additional memory, interface, and peripheral options required.

Count the total number of module positions.

Count the total number of bus positions.

Choose a backplane configuration that satisfies the module position requirement, the bus
position requirement, and also provides sufficient expansion space.

Enter the option names in the backplane positions of the selected configuration.

Review the initial backplane configuration to determine if changes must be made.

Ifno changes are necessary, move to the appropriate backplane configuration chart (Figures
A-3 through A-8). Enter the option names and numbers, the ac and dc loads, the power
consumption, and the cable numbers (the Option Summary Chart, Table A-1, lists power
requirements and bus loads for the LSI-11 modules). Total the power consumption and the
ac and dc loads. If any of these exceed the limits specified, the module configuration will
have to be altered or a new backplane configuration will have to be selected.

A-2

PDP11/03 (H9270)

1
2

1A8
1CD

2CD

2AB

5
6
7
8

3AB
3CD
4cp
4AB

11,12

2ABCD

23,24

13,14
15, 16
17,18
19, 20
21,22

25, 26

11
12
13
14
15

3ABCD
4ABCD
5ABCD
6ABCD
7ABCD

9ABCD

27, 28

29, 30

37, 38
39, 40
41, 42

|
|
|
| BDV11-A
TERMINATOR
-

KD11CPU

]

—

L
_M9400-YE
M9401

M9401

!
)
|
!
;
|

BDV11-A TERMINATOR

M9400-YD

1ABCD

2ABCD

23
24
25

6ABCD
' 7ABCD
8ABCD

a3, 44

8ABCD

20
21
22

31, 32
33,34
35, 36

1ABCD

_KD11CPU

9,10

KD11cCPU

3ABCD
4ABCD
5ABCD

(H9270)

BA11-N (H9273)

PDP11/03

1
2

POSITION | SLOT

. caad
o

BUS

POSITION

MODULE

(2) BA11-N (H9273)

TERMINATOR

BDV11-A

9ABCD
MA-0757

Backplane Selector Chart, PDP-11 /03 Expansion

PDP11/03L (H9273)

PDP11/03L (H9273)
+*

3,4
5,6

2
3

5
6
7
8

7.8

9,10
11, 12
13, 14
15, 16
17,18

PDP11/03L

2ABCD
3ABCD

MSV11-CD MEMORY
I

MSV11-CD MEMORY
|

5ABCD
6ABCD
7ABCD
S8ABCD

|
1
I
)

!
|
|
i

POSITION | SLOT
1ABCD
1

19, 20

23,24
25, 26

12
13

4ABCD

9ABCD

1ABCD

{H9273)
KD11-H CPU

BDV11-A TERMINATOR

KD11-H CPU

M9400-YE
M9401

2ABCD

27,28

5ABCD

;

19
20

47, 48

41, 42
43, 44
a5, 46

49, 50
51, 52
53, 54

21
22
23
25
26
27

M9400-YE

N
|

3ABCD
4ABCD

!
t

6ABCD
7ABCD

BABCD

BDV11-A TERMINATOR

9ABCD

1ABCD
2ABCD

M8400-YD
M9401

37, 38
39, 40

3ABCD
4ABCD
5ABCD

W TR

35, 36

6ABCD

JURE TR

33,34

M9401

15
16

21, 22

29, 30
31, 32

KD11-H CPU

MSV11-CD MEMORY

e
-

BUS

(2) BA11-N (H9273)

eilsae

MODULE

POSITION
1,2

BA11-N (H9273)

e st B
il

Figure A-1

7ABCD
8ABCD
9ABCD |

BDV11-A

TERMINATOR

MA-0732

Figure A-2

Backplane Selector Chart, PDP-11/03L Expansion
A-3

H9273
1— KD11-H

3— MSV11-CD

9
11

17— BDV11-A

MODULE

OPTION

POSITION | TYPE
1

PDP11/03L BOX

KD11-H

[

MSV11-CD

CURRENT (AMPS})| BUS LOADS

NUMBER

| +5v

| +12v

|AC

M7264-YA | 1.6

0.25

3.3

1.0

0.54

2.4

1.0

()

M7955.YD | 1.1
4

CABLES

6
7

8
9
10
1
12

13
14
15

BDV11-A

[)

M8012

125

| 0.05

1.6

1.0

2.6

MAXIMUM AVAILABLE| 155 | 80

]

MODULE TOTALS

H9273
TOTAL

*IF THEBDV11-A

(OR ANOTHER 120-OHM TERMINATOR]) IS NOT IN THE
BACKPLANE, THE SYSTEM CAN SUPPORT ONLY 20 AC LOADS.
MA-0760

Figure A-3

Configuration Chart, PDP-11/03L (H9273)

H8273

2
4

1 — KD11-H
|3 —MSV11CD

8 | PDP11/03L MAIN BOX

M9400-YE

(2) BCOSL CABLES

H9273

20
22
24

M9401

19
21
23

26 | BA11-N EXPANDER BOX

29
3

30
32

35 — BDV11-A

MODULE
POSITION | TYPE
1

KD11-H

MSV11-CD

OPTION
NUMBER

CABLES

1.6

0.25

3.3

1.0

M7955-YD

1.1

054 | 24

1.0

M9400-YE

0.29

(2) BCOSL (NOTE 2)

PDP11/03L MAIN BOX

8.0

NOTE 1

M7264-YA

)

CURRENT (AMPS)§ BUS LOADS
DC
+12v | AC
+5V

6
7

8
9
10
11

12
13
14

BCV1B

MODULE TOTAL

H9273

TOTAL

MAXIMUM AVAILABLE | 155

BCV1B

M9401

BDV11-A

M8012

1.25

0.05

1.6

1.0

2.6

| 155

8.0

NOTE 1

22
23
24

26
27

28
29

30
31
32

33
34

)

MODULE TOTAL

M9273

TOTAL

MAXIMUM AVAILABLE

BA11-N EXPANDER BOX

NOTES:

1. THE TOTAL DC LOADS OF BOTH BOXES CANNOT EXCEED 20.

2. EACH BCO5L CABLE MUST BE AT LEAST 61cm (2 FT.) LONG, BUT A 183cm (6 FT.) LENGTH IS RECOMMENDED.
MA-0730

Figure AQ4 Configuration Chart, PDP-11/03L (H9273) and BA11-N (H9273)
A-5

| 1-KD11-H

H9273
—

MODULE
POSITION | TYPE
1
KD11-H
>
s

¥17

M9400-YE

PDP11/03L MAIN BOX

NUMBER
M7264T

| msviico | wmyessvD |

BCV1B

M9400-YE

_CUR
+5V
1.6
2

(AMPS) | B
+12V__[AC
0.25 | 3.3

11 | o054

’

DC
1.0
=

CABLES

|24 | 10

;‘;
13
14

(2) BCOSL CABLES

=
16

H9273

g Mos01

22-4%-

55
=

29
3

_fi

]

MODULE TOTAL

‘

0.29

"(2) BCOSL (NOTE 2)
,

H9273

)

2.6

MAXIMUM AVAILABLE | 155

8.0

NOTE 1

33
35 M9400-YD

34
36

BA11-N EXPANDER BOX 1
(2) BCO5L CABLES

TOTAL

BCV1B

M9401

BCV1A

M9400-YD

2.6

155

8.0

20 | NOTE1

PDP11/03L MAIN BOX

ii
26

{37 _moa01
39

)

H9273

38
40

46 |

53-BDV11-A

31
32

BA11-N EXPANDER BOX 2

MODULE TOTAL

H9273

TOTAL

MAXIMUM AVAILABLE |

(2) BCO5L (NOTE 3)

BCV1A

M9401

BDVil-A

M8012

125 | 005

116 | 1.0

2.6

MAXIMUM AVAILABLE | 155

8.0

NOTE 1

BA11-N EXPANDER BOX 1

—

38
39
a0

NOTES:

1. THE TOTAL DC LOADS OF ALL BOXES CANNOT EXCEED 20.

2. THIS BCOSL MUST
BE AT LEAST 61cm (2 FT.) LONG,
BUT A LENGTH OF 183cm (6 FT.) IS RECOMMENDED.

45
46
a7

3. THIS CABLE MUST BE AT LEAST 122cm (4 FT.) LONGER
OR SHORTER THAN THE CABLE IN NOTE 2; A 3.05m

(10 FT.) LENGTH IS RECOMMENDED.

4. THE COMBINED Lgfism OF BOTH BCO5L CABLES
CANNOT EXCEED 488cm (16 FT.).
‘

48
49

50
51

52
53

MODULE TOTAL

H9273

TOTAL

BA11-N EXPANDER BOX 2

MA-0770

Figure A-5 Configuration Chart,
PDP-1 1/03L (H9273)
and (2) BA11-N (H9273)
A-7

. ef

1—KD11-

H9270

8 — BDV11-A

PDP11/03 BOX

MODULE

POSITION | TYPE
1
2

OPTION

NUMBER

KD11
()

M7264
(]

BDV11-A

M8012

CURRENT (AMPS)|

BUS LOADS

+5V

+12v | AC

1.25

0.05

1.6

1.0

5.1

)

| 13.0

35* | 20

3.3

1.0

CABLES

5
6

MODULE TOTAL

H9270

TOTAL
MAXIMUM AVAILABLE

PDP11/03 BOX

*IF THE BDV11-A (OR ANOTHER 120-OHM TERMINATOR) IS NOT IN THE BACKPLANE,
THE SYSTEM CAN SUPPORT ONLY 20 AC LOADS.

MA-0733

Figure A-6 Configuration Chart, PDP-11/03 (H9270)

H9270

1—KD11.

| 4

| 8

3 | PDP11/03 MAIN BOX

M9400-YE

(2) BCOSL CABLES ——uf
H9273
9

25 — BDV11-A

MODULE
POSITION | TYPE
1
KD11-

(NOTE 1)

OPTION
NUMBER
M7264

{ BA11-N EXPANDER BOX

CURRENT (AMPS) | BUS LOADS
+5V
+12v
|AC
DC
3.3
1.0

CABLES

0.29

(2) BCOSL (NOTE 3}

5.1

PDP11/03 MAIN BOX

13.0

4
5
6
7

BCV1B

M9400-YE

MODULE TOTAL

H9270
TOTAL

MAXIMUM AVAILABLE

NOTE 2

BCV1B

M9401

BDV11-A

M8012

1.25

0.05

1.6

1.0

2.6

15.5

8.0

10
1

12
13
14

16
17

18
19

20
21
22

23
24

MODULE TOTAL

H9273
TOTAL

MAXIMUM AVAILABLE

NOTE 2

BA11-N EXPANDER BOX

NOTES:

ATEV11 OR A REV11-A DOUBLE MODULE IN POSITION 25 WILL ALSO TERMINATE THE LSI-11 BUS.

2. THE TOTAL DC LOADS OF BOTH BOXES CANNOT EXCEED 20.

3. THE BCO5L CABLE MUST BE AT LEAST 61cm (2 FT.) LONG, BUT A 183cm (6 FT.) LENGTH IS RECOMMENDED.
MA-0728

Figure A-7

Configuration Chart, PDP-11/03 (H9270) and BA11-N (H9273)

|_1—KD11.
L4
| &

MODULE

3
6

L8 _M9400-YE

CURRENT (AMPS)f_BUS LOADS

POSITION | TYPE
1
KD11-

+5V

+12v | AC
33

DC
1.0

CABLES

0.29

)

(2) BCO5L (NOTE 3)

5.1

13.0

NOTE
2

(2) BCOSL (NOTE 4)

2.6

BA11-N EXPANDER BOX 1

MAXIMUM AVAILABLE | 155

8.0

NOTE
2

1,25

0.05

1.6

1.0

|26 | 0

MAXIMUM AVAILABLE | 155

8.0

3
a

PDP11/03 MAIN BOX

e— (2) BCOSL CABLES

BCV1B

M9400-YE

MODULE TOTAL

H9270
TOTAL
%
MAXIMUM AV%!LABLE

H9273

9 M9401

12
13

26 M9400-YD

M9401

BCV1B

PDP11/03 MAIN BOX

18
BA11-N EXPANDER BOX 1

20
21

s— (2) BCOSL CABLES

- is’"é

BCV1A

100-YD

MODULE TOT

H9273

TOTAL

H9273

27 M9401

L
28

37
39

38
40

43-BDV11-A

(NOTE 1)
—

M9401

32
33

—44

BA11-N EXPANDER BOX 2

BCV1A

|
§

36
37

39
40

BDV11-A

MODULE TOT

Ha273

TOTAL

BA11-N EXPANDER BOX 2

NOTE
2

NOTES:
1.

ATEV11 OR A REV11-A DOUBLE MODULE IN POSITION 43WILL ALSO T ERMINATE THE LSI-11 BUS.

2. THE TOTAL DC LOADS OF ALL BOXES CANNOT EXCEED 20.

;

3. THIS CABLE MUST BE AT LEAST 61cm (2 FT.) LONG, BUT A LENGTH OF 183cm (6 FT.) IS RECOMMENDED.

4. THIS CABLE MUST BE AT LEAST 122cm (4 FT.) LONGER OR SHORTER THAN THE CABLE IN NOTE 3;

A 31cm (10 FT.) LENGTH IS RECOMMENDED.

5. THE COMBINED LENGTH OF BOTH BCO5L CABLES CANNOT EXCEED 488¢m (16 FT.).

MA-0729

Figure A-8 Configuration Chart,
PDP-11/03 (H9270)
and (2) BA11-N (H9273)
A-11

f 4

,.a5&;é

Table A-1

.
Type

Option
~ Number

AAV11-A

A6001

Description
12 bit, 4-Channel D/A
Converter

Option Summary Chart

Amps
+5V

(Typ)
[+12V

Bus Loads
ac
dc

Size

Cables

1.5

0.4

2.0

Quad

BC04Z
BCO04R

BCO8R Used

w/H322

ADVII-A

AO0I2

12 bit, 16-Channel A/D
Converter

0.45

3.3

Quad

BC04Z
BCO8R Used
w/H322

BCVIA-XX

M9400-YD | 2 modules, 2 Cables
M9401

0.29A |0
0

1.25

9 X 6 Backplane

Serial Line Interface

Used to Interconnect

Double

(2) BCO5L-XX

Double

(2) BCOSL-XX

10.05*

1.6

Quad

----

6.4

----

1.0

|0.18

2.6

Double

BCO5M-X for

Double

Included

4 X 4 Backplane, No
Terminators

BCVI1IB-XX

M9400-YE

M9401

2 Moduies, 2 Cables

Used to Interconnect

Double

Included

4 X 4 Backplane, 250Q
Terminators

BDVI11-A

M8012

Terminator, Boot, and
Diagnostic

DDVI11-B

DLV11

M7940

20 MA Loop

BCO5C-X for
EIA

KWVI1I1-A

M7952
|
|

LAV1I1

M7949
|

LPV1l]

Programmable
- Real-Time Clock

LA180 Line Printer

1.75

10.01
|

3.5

Quad

BC04Z
BCO8R

050

1.9

]

Double

BC11S-XX

Double

-———-

Double

----

Interface

LA180 Line Printer

2.8

3.3

Interface

MRVI11-A

M7942

4K X 16

PROM

Fully

Loaded

*Increases if customer ROMs are installed.

Table A-1

Option

MRV11-B

Number

Option Summary Chart (Cont)

Description

M8021

4K X 16

U/V PROM,

256 X 16 RAM

Amps (TyE)

Bus Loads

+5V

+12V

Size

0.62

0.5

2.8

]

Double

Loaded - -

Cables
—---

Fully

-—
-

MSV11-B

M7944

4K X 16 MOS RAM

0.6

0.3

33 | 1

Double

MSVI1I-CD

M7955-YD

16K X 16 MOS RAM

1.1

0.54

2.4

Quad

Floppy Disk Boot,

1.6

2.2

Double

----

1.0

2.2

Double

ceea

1.5

1.8

Double

BCOSL-X

MSV11-D

REVI1I-A

M9400-YA

DMA RAM Refresh,

120 £ Terminator
REV11-C

M9400-YC

Same as REV11-A
w/o Terminator

RXV11-B

M7946

Floppy Disk Interface

Max

TEVI1
DRV11

M9400-YB | 120 £ Bus Terminator

M7941

0.9

2.8

Parallel Line Interface

| o

Double

---

]

Double

(2) BCO7D-X

BC11K-25
DRVI11-B

M7950

DRVI11-P

M7948

DMA Interface

Bus Foundation Module

DUVII-DA

M7951

Synchronous Serial

1.9

1.0

Quad

(2) BC04Z-X

Quad

1.3

]

Quad

BC05C-25

Quad

BC11U-25

Plus

User Logic

0.86

0.32

1.15

0.39

Line Interface
DZV11-A

M7957

Quad Asynchronous

Serial Line Interface

H9270

4 X 4 Backplane

5.1

H9273

9 X 4 Backplane

- -

2.6

—ee-

IEEE Instrument Bus

0.8

1.6

]

Double

BNI11A

IBV11-A

M7954
|

Interface

Included

TM L

5E,

Table A-1

Type

FOPfiGH

KDI11-F

Number
M7264

Description
LSI-11 CPU with

Option Summary Chart (Cont)

Amps (Typ)

Bus Loads

Size

Cables

33|

Quad

LSI-11 CPU w/o RAM

1.6

0.25

3.3

LSI-11 CPU w/o RAM

Double

——e-

M7264-YA

LSI-11 CPU with

1.6

0.25

3.3

Quad

M7955-YD

16K X 16 MOS RAM

1.1

0.54

2.4

Quad

M8016

Power Fail/Restore

0.011

0.082

Double

4K X 16 MOS RAM

KDI11-H

M7264-YA

KDI1-HA

KDI11-R

KPV1I-B

Signal Sequencer,
Line Time Clock and

120 €2 Terminator

A-17

{

.
"

Reader’s Comments

BA11-N MOUNTING BOX

USER’S GUIDE
EK-BA1IN-UG-001

Your comments and suggestions will help us in our continuous effort to improve the quality and usefulness of our
publications.

What is your general reaction to this manual? In your judgment is it complete, accurate, well organized, well
written, etc.? Is it easy to use?

~, What features are most useful?

What faults or errors have you found in the manual?

Does this manual satisfy the need you think it was intended to satisfy?

O
]

Please send me the current copy of the Technical Documentation Catalog, which contains information on
the remainder of DIGITAL’s technical documentation.

Name

Street

City

Title
»

Why?

“

Does it satisfy your needs?

Company

Department

State/Country

Zip

Additional copies of this document are available from:
Digital Equipment Corporation

444 Whitney Street

Northboro, Ma 01532

Attention:

Order No.

Communications Services (NR2/M15)
Customer Services Section

EK-BA11N-UG-001

_—— —

—— ——

Do Not Tear
- Fold Here and Staple

— —

FIRST CLASS

PERMIT NO. 33
MAYNARD, MASS.
BUSINESS REPLY MAIL
NO POSTAGE STAMP NECESSARY IF MAILED IN THE UNITED STATES
Postage will be paid by:

Digital Equipment Corporation

Technical Documentation Department
Maynard, Massachusetts 01754

Printed in U.S.A