EIGHT ·INCH MODULE DRIVE

83325410

It

<S 2> ^{CONT~OL DATA}

CDC

^e

EIGHT ·INCH MODULE DRIVE

PA8A2

GENERAL DESCRIPTION OPERATION

INSTALLATION AND CHECKOUT PARTS DATA

Volume 1

REVISION RECORD

REVISION DESCRIPTION

01 Preliminary release.

(05-06-85)

02 Preliminary revision.

(06-24-85)

A Original release. This edition obsoletes all (09-25-85) previous editions.

REVISION LETTERS I. 0, Q AND X ARE NOT USED.

@ 1985

By Control Data Corporation Printed in the United States

of America

t

Address comments concerning this manual to:

Control Data Corporation Twin Cities Disk Division Customer Documentation Dept.

5950 Clearwater Drive Minnetonka, MN 55343

or use Comment Sheet in the back of this manual.

MANUAL TO EQUIPMENT LEVEL CORRELATION

,e

M ^{i 89Mt} i;'

This manual reflects the equipment configurations listed below.

EXPLANATION: Locate the equipment type and series code number.

as shown on the Equipment Configuration Log. in the list be- low. Immediately to the right of the series code number is an FCO number. If that number and all of the numbers underneath it match all of the numbers on the Equipment Configuration Log.

then this manual accurately reflects the equipment.

This correlation sheet also applies to the following related manuals:

Pub. No. __ ~8~3~3~2~5~4~2~0~ ______ R.ev. A Pub. No. __ ~8~3~3~2~5~4~3~0~ ______ R.ev. A

EQUIPMENT TYPE PA8A2

SERIES CODE 01

WITH FCOs None

COMMENTS

LIST OF EFFECTIVE PAGES

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New features. as well as changes. deletions.

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PREFACE

This manual contains maintenance information for the CONTROL DATA@ PA8A2 Eight-Inch Module Drive (EMD). It provides instructions to all personnel who operate the EMD and to customer engineers who install and check out the EMD.' Cus- tomer engineers who troubleshoot and repair EMDs should obtain copies of the Hardware Maintenance Manual. Volumes 2 and 3 (listed below) that pertain to the drives they are maintaining.

The information in this manual is presented as follows:

Section 1 - General Description. Describes equipment func- tions and specifications.

Section 2 - Operation. Describes and illustrates the loca- tion and use of all controls and indicators. and provides operating procedures.

Section 3 - Installation and Checkout. Describes site re- quirements. unpackaging and inspection. installa- tion and checkout.

Section 4 - Par~s Data. Contains illustrated parts breakdown and spare parts list.

The following manuals apply to the EMD and are available from Control Data Corporation. Literature Distribution Services. 308 North Dale Street. St. Paul. MN 55103:

Publication No. Title

83325410 PA8A2 Hardware Maintenance Manual. Volume 1 83325420 PA8A2 Hardware Maintenance Manual. Volume 2

(contains theory of operation and maintenance)

83325430 PA8A2 Hardware Maintenance Manual. Volume 3 (contains diagrams)

r

CONTENTS

Important Safety Information and Precautions Configuration Chart

Abbreviations

1. GENERAL DESCRIPTION Introduction

Equipment Interface Description Equipment Functional Description Equipment Physical Description Equipment Configuration

General

Equipment Identification General

Equipment Identification Number Series Code

Part Number Serial Number

Equipment Configuration Log

Manual to Equipment Level Correlation 2. OPERATION

Introduction

Switches and Indicators General

Power Supply

Status/Control Panel (Optional) Control Board

I/O Board

xv xvii xix

1-1 1-1 1-1 1-5 1-9 1-9 1-9 1-9 1-10 1-10 1-10 1-10 1-11 1-11

2-1 2-1 2....;1 2-1 2-3 2-3 2-7

Operating Instructions 2-7

General 2-7

Power On Procedure (Drives With Status/Control Panel) 2-7 Power Off Procedure (Drives With Statui/Control Panel) 2-8

Filter Replacement and Cleaning 2-8

General 2-8

Filter Replacement 2-9

Filter Cleaning 2-10

3. INSTALLATION AND CHECKOUT Introduction

Site Requirements General

Electrostatic Discharge Protection Environmental Requirements

Space Requirements Power Requirements

Normal Requirements

Special Requirements for 3-Phase. 4-Wire Wye Site Power

General

Specifications for Neutral Conductor

Limiting Branch and Feeder Circuit Load Currents Transformers

Grounding Requirements General

Safety Grounding System Grounding Interface Requirements

Unpackaging. Inspection and Repackaging General

Unpackaging

3-1 3-1 3-1 3-1 3-2

3~4

3-6 3-6 3-8 3-8 3-8 3-8 3-9 3-10 3-10 3-10 3-10 3-10 3-12 3-12 3-12

Inspection Repackaging

Installation Procedures General

Power Supply Voltage Conversion Mounting 2X Drawer in Rack

Mounting Front Panel

Mounting Status/Control Panel

Mounting Drive and Power Supply in 2X Drawer System I/O Cabling

System Grounding

Star Grounding Procedure

Daisy Chain Grounding Procedure Setting Circuit Board Switches

Recommended Method for Sector Switch Settings Alternate Method for Sector Switch Settings Checkout

Checkout in Remote Mode Checkout in Local Mode 4. PARTS DATA

Introduction

Field Replaceable Parts List

Manu~acturer's

Recommended Spare Parts Accessories

Eight-Inch Module Drive Drive Electronics Assembly

3-15 3-15 3-16 3-16 3-16 3-17 3-20 3-21 3-26 3-27 3-30 3-30 3-32 3-33 3-40 3-48 3-49 3-49 3-50

4-1 4-1 4-3 4-3 4-5 4-11

·1-1 1-2 2-1 2-2 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12·

3-13 3-14 3-15 3-16 3-17 4-1 4-2

FIGURES

Drive Functional Block Diagram Drive Major Assemblies

Switches and Indicators Air Filter Replacement Drive Space Requirements

Typical Line Current Versus Start-up Time System Cabling

A Cable B Cable

Power Supply Voltage Conversion AC Power Cables

2X

Drawer Installation Mounting Front Panel

Mounting Status/Control Panel

Mounting Drive and Power Supply in

2X

Drawer

I/O

Cable Attachment

Terminator Installation (Typical) System Grounding Diagram

System Grounding

Setting Circuit Board Switches Miniature Switches

Eight-Inch Module Drive Drive Electronics Assembly

1-5 1-6 2-2 2-9 3-5 3-7 3-11 3-13 3-15 3-17 3-18 3-19 3-21 3-22 3-24 3-28 3-29 3-31 3-32 3-34 3-39 4-4 4-10

1-1 2-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 4-1 4-2

TABLES

Drive Specifications

Drive Switches and Indicators Environmental Requirements Power Requirements

Load Current Limits with Larger Neutral Load Current Limits with Same Size Neutral

I/O Board Switch Settings Control Board Switch Settings

Control Board Logical Address Switch Settings Sector Select Switch Settings - 806 KHZ

Manufacturer's Recommended Spare Parts Accessories

1-2 2-4 3-2 3-6 3-9 3-9 3-35 3-37 3-38 3-41 4-13 4-15

IMPORiANT SAFETY INFORMATION AND PRECAUTIONS

Proper safety and repair is important to the safe. reliable op- eration of this unit. service should be done by qualified per- sonnel only. This maintenance manual describes procedures rec- ommended by the manufacturer as effective methods of servicing the uni t. Some of these procedures require the use of spe- cially designed tools. For proper maintenance and safety.

these specially designed tools should be used as recommended.

The procedures in this maintenance manual and labels on the unit contain warnings and cautions which must be carefully read and observed in order to minimize or eliminate the risk of per- sonal injury. The warnings point out conditions or practices that are potentially hazardous to maintenance personnel. The cautions point out practices which. if disregarded. could dam- age the unit and make it unsafe for use.

For the safety of maintenance and operating personnel. the fol- lowing precautions must be observed:

• Perform all maintenance by following the procedures given in this manual and using only CDC/MPI replacement parts.

• Read and observe all cautions and warnings provided in the procedures and labeled on the unit.

• Use the special tools called out in the maintenance pro~

cedure.

• Observe sound, safety practices when performing mainte- nance.

• Use caution when troubleshooting' a unit that has voltages present. Remove power from unit before servicing or re- placing components.

• Wear safety glasses when servicing units.

• Wear safety shoes when removing or replacing heavy com- ponents.

It is also important to understand that these warnings and cau- tions are not exhaustive. The manufacturer could not possibly know. evaluate and advise maintenance personnel of all ,conceiv- able ways in which maintenance might be performed or the possi- ble risk of each maintenance technique. Consequently. the man- ufacturer has not completed any such broad evaluation. Thus.

any persons who use any. non-approved maintenance procedure or tool must first satisfy themselves that· neither their safety nor the unit performance will be jeopardized by the maintenance techniques they select.

CONFIGURATION CHART

EQUIPMENT DATA CAPACITY

NUMBER

*

^{INTERFACE (MB)}

PA8A2A Dual Channel 368

*

Refer to Section 4 for equipment package listings that include painted parts and other supplied op- tions.

ABBREVIATIONS

A Ampere CLK Clock

ABV Above CLR Clear

ac Alternating Current cm Centimeter

ADD Address CNTR Counter

ADDR Address COMP Comparator

ADJ Adjust CONT Control

ADRS Address CONTD Continued

AGC Automatic Gain Control CT Center Tap

ALT Alternate CYL Cylinder

AM Address Mark D/A Digital to Analog AME Address Mark Enable dc Direct Current AMP Amplifier. Ampere DET Detect

ASSY Assembly DIFF Differential

BLW Below DIV Division

C Celsius DLY Delay

CB Circuit Breaker DRVR Driver

CDA Complete Drive ECL Emitter Coupled Logic Assembly

ECO Engineering Change

CDC Control Data Order

Corporation

EMD Eight-Inch Module

CH Channel Drive

CHK Check EN Enable

ABBREVIATIONS (Contd)

ENBL Enable EXT External

F Fahrenheit. Fuse FCO Field Change Order FDBK Feedback

FIG Figure FLT Fauit ft Foot

FTU Field Test Unit FWD Forward

GND Ground HD Head HEX Hexagon Hg Mercury

HR High Resolution HYST Hysteresis

Hz Hertz

IC Integrated Circuit IDENT Identification in Inch

IND Index INTRPT Interrupt 1/0

IPB

Input/Output

Illustrated Parts Breakdown

IPS Inches per Second kg Kilogram

kPa Kilopascal kW Kilowatt lb Pound

LCD Liquid Crystal Display LED Light Emitting Diode LSI

LTD m MAX MB MEM

MHz

mm

Large Scale Integration Lock to Data Meter

Maximum Megabyte Memory, Megahertz Millimeter

ABBREVIATIONS (Contd)

MPI Magnetic Peripherals, Inc.

MPU Microprocessor Unit MRK Mark

ms Millisecond MTR Motor

mV Millivolt NC No Connection NORM Normal

NRZ Non Return to Zero ns Nanosecond

OC On Cylinder OS One-Shot OSC Oscillator P Plug

PD Peak Detect pF Picofarad PFTU

PG PHH

Programmable Field Test Unit

Page

Phillips Head

PLO Phase Lock Oscillator PROC Procedure

PROG Programmable PS Power Supply PWR Power Supply RCVR Receiver RD Read RDY Ready REF Reference REQ Request RES Resolution

REV Reverse, Revision RGTR Register

r/min Revolutions Per Minute RTZ Return to Zero

R/W Read/Write s Second

SIC Series Code SEC Second

SEL Select

ABBREVIATIONS (Contd)

SECTION 1

GENERAL DESCRIPTION

GENERAL DESCRIPTION 1

INTRODUCTION

The Control Data PA8A2 Eight-Inch Module Drive (EMD) is a high speed. random access digital data storage device that connects to a central processor through a controller. The total unfor- matted storage capacity of the PA8A2 is 368 megabytes. All the equipment specifications for the drive are listed in table 1-1.

The remainder of this section provides a general description of the drive and is divided into the following areas:

•

^Equipment Interface Description drive interfaces.

Describes available

• Equipment Functional Description -- Explains the basic function of the drive.

• Equipment Physical Description Provides a basic de- scription of the drivels physical characteristics.

• Equipment Configuration -- Describes the various drive configurations and 'how to identify them.

EQUIPMENT INTERFACE DESCRIPTION

The drive can be configured to operate with either a standard (SMD-O) or an enhanced (SMD-E) interface. Refer to section 3 of this manual for definitions of signals on the interface ca- bles (under Interface Requirements). Section 3 also contains instructions on selecting the various interface options avail- able (under Setting Circuit Board Switches). Refer to volume 2 of the hardware maintenance manual for a complete description of interface functions.

EQUIPMENT .FUNCTIONAL DESCRIPTION

The drive contains all the circuits and mechanical devices nec- essary to record data on and recover it from its disks. The necessary power for this is provided by the power supply. which receives its input power from the site main power source.

TABLE 1-1. DRIVE SPECIFICATIONS

Characteristics

Size

Interface Recording

Transfer rate

Conditions PHYSICAL Dimensions Weight (Drive only)

Weight (Power Supply only) SMD-O/SMD-E Total Capacity

(Unformatted) Number of disks Movable data heads Servo Heads

Tracks per inch Physical heads per surface

Logical cylinders per head/disk assy Disk speed

at 3600 r/min

Specifications

See Space Require- ments in section 3 12.0 kg (25.0 lbs) 3.2 kg (7.0 lb)

368 megabytes 6

10 1 960 1

1217 (0-1216)

14.52 MHz (I 814 438 bytes/sec)

Table Continued on Next Page

TABLE 1-1. DRIVE SPECIFICATIONS (Contd)

Characteristics Conditions

PERFORMANCE Latency

Average

Maximum

Recording Mode

Density

Seek Time Full

Average

Single Track

Start Time Stop Time

Specifications

Latency is time to reach a particular track address after positioning is com- plete.

8.33 milliseconds (disk rotation speed at 3600 r/min)

16.83 milliseconds (disk rotation speed at 3564 r/min)

2-7 code

15 185 hi ts per inch (inner track)

10 132 hi ts per inch (outer track)

35 milliseconds max- imum

18 milliseconds 5 milliseconds max- imum

30 seconds maximum 50 seconds maximum

All functions performed by the drive are done under direction of the controller. The controller communicates with the drive . via the. interface which consists of a number of I/O lines car-

rying the necessary signals to and from the drive.

Some interface lines. including those that carry commands to the drive. are not enabled unless the drive is selected by the controller. Unit selection allows the controller. which can be connected to more than one drive. to initiate and direct an operation on a specific drive.

All operations performed by the drive are related to data stor- age and recovery (normally referred to as writing and read- ing). The actual reading and writing is performed by electro- magnetic devices called heads that are positioned over the re- cording surfaces of the rotating disks. There is one head for each disk surface. and the heads are positioned in such a way that data is written in concentric tracks around the disk sur- faces (see figure 1-1).

Before any read or write operation can be performed. the con- troller must instruct the drive to position the heads over the desired cylinder (called seeking) and also to use the head lo- cated over the surface (head selection) where the operation is to be performed.

After selecting a head and arrlvlng at the data track. the con- troller must locate that portion of the track on which the data is to be written or read. This is called track orientation and is done by using the Index and Sector signals generated by the drive. The Index signal indicates the logical beginning of each track. and the Sector signals are used by the controller to determine the position of the head on the track with respect to Index.

When the desired location is reached. the controller commands the drive to actually read or write the data. During a read operation. the drive recovers data from the disks and transmits it to the controller. During a write operation. the drive re- ceives data from the controller. processes it and writes it on the disks.

The drive is also capable of recognizing certain errors that may occur during its operation. When an error is detected. it is indicated either by a signal to the controller or by a main- tenance indicator on the drive itself.

NOTES:

UNIT SELECTION

LOGIC

DATA RECORDED IN CONCENTRIC TRACKS

HEAD

I e - - - t i

SELECT1 ON ...

LOGIC

SEEK POSITIONING

LOGIC DEVICE

TRACK ORIENTATION

LOGIC

ERROR DETECT1 ON

LOGIC

<

POWER SUPPLY

:>

~

INTERFACE SELECTIONS = SMO-O OR SMO-E

Figure 1-1. Drive Functional Block Diagram EQUIPMENT PHYSICAL DESCRIPTION

DISKS

11F20

The following paragraphs provide a physical description of the drive. The components mentioned in this discussion are identi- fied in figure 1-2.

A drive installation requires a drive. interconnecting cabling.

and a power supply. Site power enters the power supply via the ac power cable. The power supply develops the dc voltages re- quired by the drive. These voltages are supplied to the drive by the dc power cable.

COOLING fAN

POWER SUPPLY

'" ^{AC POWER CABLE}

I/O CABLE CONNECTORS

NOTES:

CONTROL BOARD MODULE

~

READ/WRITE.BOARD

& ^OPTIONAL

IA MOUNTED DIRECTLY IN fRONT Of D'RIVE (]N 2X DRAWER) OR MOUNTED IN REMOTE LOCATION

~ MODULE CONTAINS THE DISKS, SPINDLE, DRIVE MOTOR, ACTUATOR, AND THE HEADS.

~ USED WHEN POWER SUPPLY ]S MOUNTED 1N REMOTE LOCATION.

11f21 Figure 1-2. Drive Major Assemblies (Sheet 1 of 2)

&

POWER SUPPLY

STATUS/CONTROL fRONT PANEL PANEL&

INSERT

ADJUSTING BRACKET

NOTES:

INNER DRAWER~

& OPTIONAL

~

TWO DRIVES AND POWER SUPPLIES MAY BE MOUNTED SIDE-BY-SIDE

IN 2X DRAWER 11f62

Figure 1-2. Drive Major Assemblies (Sheet 2)

The drive package includes a top cover. rear panel. module. and three circui t boards. Air flow is provided by a cooling fan.

The cooling fan is an integral part of the optional power sup- ply. and provides cooling air to the drive when the power sup- ply is mounted directly in front of the" drive. When the power supply is mounted in a remote location. drive cooling is pro- vided by an optional fan and rear panel assembly.

The optional status/control panel contains operator controls and a maintenance keyboard with a display for error codes.

The control panel contains the following:

• Logical Address switch

• Unit Selected Light

• Start/Stop switch and light

• Fault/Clear switch and light

• Write Protect switch and light

The maintenance keyboard provides the following general in- structions:

• Unit Selected and Reserved status

• Current cylinder address

• Fault indication (type and history of occurrence)

• Internal machine status (type and history of occurrence)

• Off-line diagnostics control and display

The drive ^I s internal components include three circuit boards and a module. The circui t boards are mounted on the module.

and they contain the electronics required for drive operation.

The module is a sealed uni t containing the electromechanical components used for data storage and retrieval. These compo- nents include the disks, spindle. drive motor. actuator and heads.

The six disks provide the recording medium for the drive.

These disks are mounted ,on a spindle. and the spindle is coupled directly to the drive motor. When activated, the drive motor rotates the disks at 3600 r/min and also produces a cir- culation of air within the sealed module.

The actuator is the assembly that holds the heads and moves the heads over the rotating disks. There are 11 heads: a servo head to sense actuator positioning. and 10 data heads used for data transfers to and from the disks. The actuator has a voice coil which rotates in and out of a permanent magnetic field in response to signals from the servo positioning circuitry. The voice coil moves the heads in an arc across the rotating disks. When the drive is not in use. the heads rest on the disk surface in the preassigned landing zone (beyond the data zone in the outer radius of the disk surface). The actuator is automatically latched in this position. at shutdown. for moving or shipping protection. When the drive is activated to bring the disks up to speed. the heads fly on a cushion of air close to the disk surface.

The drive may be mounted either in a cabinet or rack. An op- tional 2X drawer with a front panel for each drive is available for mounting two drives and power supplies side-by-side.

A complete listing of field-replaceable parts is given in the parts data section of this manual. Refer to volume 2 of the

hardwa~e maintenance manual for theory of operation of the drive components.

EQUIPMENT CONFIGURATION

GENERAL

The equipment configuration is identified by the equipment identification label and by the Equipment Configuration Log.

It is necessary to identify the equipment configuration to de- termine if the manuals being used are applicable to the equip- ment. The following describes the equipment identification label. Equipment Configuration Log. and Manual To Equipment Level Correlation Sheet.

EQUIPMENT IDENTIFICATION General

The equipment is identified by labels attached to the drive top cover and to the power supply. The label on the drive top cov- er identifies the basic mechanical and logical configuration of the drive at the time it leaves the factory. To maintain drive configuration whenever the top cover is removed. always identi- fy which drive that the top cover was removed from. The label on the power supply references the components making up the drive installation and lists the si te power requirements for the power supply. The information contained on these labels is defined in the following paragraphs.

Equipment Identification Nu mb'er

The equipment identification number is divided into the two parts shown in the example:

EXAMPLE:

PAa

Equipment ______

-y-~ .

Identifier

T

AlA ^Type

Identifier

The equipment identifier indicates the basic functional capa- bilities of the drive.

The type identifier indicates differences between drives that have the same equipment identifier. These differences are nec- essary to adapt a drive to specific system requirements. How- ever. they do not change the overall capabilities of the drive as defined in table 1-1.

Series 'Code

The series code represents a time period within which a unit is built. All units are interchangeable at the system level. re- gardless of series code; however. parts differences may exist within units built in different series codes. When a parts difference exists, that difference is noted in the parts data section of this manual.

Part Number

The equipment identification label on the power supply lists three numbers: the equipment package part number. the CDA num- ber, and the power supply number. The equipment package part number is the number assigned to the complete uni t including drive. power supply (if applicable). painted panels. installa- tion hardware, etc. The power supply number is the part number for the power supply only.

Serial Number

Each drive has a unique serial number assigned to it. Serial numbers are assigned sequentially within a family of drives.

Therefore. no two equipments will have the same serial number.

EQUIPMENT CONFIGURATION LOG

Engineering Change Orders (ECOs) are electrical or mechanical changes that are performed at the factory and may cause a ser- ies code change. When the factory installs an ECO early (prior to a series code change), it is logged on the units configura- tion log.

Field Change Orders (FCOs) are electrical or mechanical changes that may be performed ei ther at the factory or in the field.

FCO changes do not' affect the series code but are indicated by an entry on the Equipment Configuration Log that accompanies each machine. The components of a machine wi th an FCO in- stalled may not be interchangeable with those of a machine without the FCO; therefore, it is important that the Equipment Configuration Log be kept current by the person installing the FCO.

MANUAL TO EQUIPMENT LEVEL CORRELATION

Throughout the life cycle of a machine, changes are made, ei- ther in the factory build (a series code change) or by FCOs installed in the field. All of these changes are also re- flected in changes to the manual package. In order to assure that the manual correlates with the machine, refer to the man- ual to equipment level correlation sheet located in t.he front matter of this manual. This sheet records all the FCOs which are reflected in the manual. It should correlate with the machine Equipment Configuration Log if all the FCOs have also been installed in the machine.

SECTION 2

OPERATION

OPERATION 2

INTRODUCTION

This section provides 'the information and instructions to oper- ate the drive. It is divided into the following areas:

• Switches and Indicators - locates and describes the var- ious controls and indicators.

• Operating Instructions ⁷ describes procedures for operat- ing the drive.

• Filter Replacement and Cleaning - describes filter main- tenance for the drive operator.

SWITCHES AND INDICATORS GENERAL

Switches and indicators are found in four locations on the drive:

• Power Supply (Optional)

• Status/Control Panel (Optional)

• Control Board

• I/O Board

Figure 2-1 shows these controls and indicators. and they are explained in table 2-1 and in the following text.

POWER SUPPLY

Theac power is applied to the power supply when the ac power cord is connected to a power source. All operating voltages for the drive and cooling fan are generated when the On/Standby switch on the power supply is placed in the On (1) position.

CONTROL BOARD

&

1/0

BOARD

&

STATUS/CONTROL PANEL

DIAGNOSTIC KEYBOARD

DIAGNOSTIC MODE SWITCH

MAINTENANCE KEYBOARD

( DI /l6NOSTI C D I SPLAY ]

DIAGNOSTIC EXECUTE SWITCH

BACKSPACE SWITCH

NOTE:

OPERATOR CONTROLS

ST ATUS/CONTROL PANEL

LOGICAL ADDRESS INDICATORS LOGICAL ADDRESS SWITCH

UNIT SELECTED INDICATOR

e-++--+---

READY INDICATOR

,t-...---~START

SWITCH FAULT INDICATOR F AUL T CLEAR SWITCH

_ _ U--~~

WRI TE PROTECT

• INDICATOR

WRITE PROTECT SWITCH

& SWITCHES LOCATED ON CIRCUIT BOARDS ARE ILLUSTRATED IN SECTION 3.

11F22 Figure 2-1. Switches and Indicators (Sheet 1 of 2)

NOTES:

&. ON

=

1 .. STANDBY

=

0

~

VOLTAGE SELECTIONS: 115 V OR 230 V

VOLTAGE SELECT

SWITCH

~

11 f23

Figure 2-1. Switches and Indicators (Sheet 2)

STATUS/CONTROL PANEL (OPTIONAL)

The status/control panel contains all the switches and indica- tors required to control and monitor the basic operation of the drive. For drives without the status/control panel. basic op- eration of the drive is controlled ^by setting the appropriate switches on the control and I/O boards. See section 3 of this manual (under Setting Circuit Boa~d Switches) for instructions on setting the switches.

CONTROL BOARD

The control board contains switches which are set during drive installation. Refer to section 3 of this manual (under Setting Circuit Board Switches) for instructions on setting the switches.

·TABLE 2-1. DRIVE SWITCHES AND INDICATORS

Switch or Indicator Function

On/Standby Switch (1/0)

Voltage Select Switch

POWER ,SUPPLY

Applies dc operating voltages to the drive electronics and fan when placed in the On (l) position.

Selects either of two operating voltages (llSv or 230v).

STATUS/CONTROL PANEL (Optional) Logical Address

Switch (ADDRESS)/

Indicators (8/4/2/1)

Unit Selected Indicator START Switch/

Ready Indicator

The Logical Address switch the logical address of the Logical Address Indicators logical address in binary.

address is stored in memory er is removed.

establishes drive. The display the The logical when dc pow- Indicates that the drive is selected by·

a controller.

The START switch has momentary action for Start and Stop. and it contains the Ready indicator. Pressing the· START switch activates the power up sequence.

and Ready indicator flashes (rapidly) until the disks are up to speed. the heads are loaded. and there are no fault conditions. The Ready indicator is on steady with power up complete. Pressing the START switch to release it from the Start posi tion causes the Ready indica- tor to flash (slowly) until disk rota- tion has stopped. The current condition of the START switch (Start/Stop) is stored in memory when dc power is re- moved.

Table Continued on Next Page

TABLE 2-1. DRIVE SWITCHES AND INDICATORS (Contd)

Switch or Indicator Function

STATUS/CONTROL PANEL (Optional) (Contd) FAULT Indicator/

Fault Clear Switch

WRITE PROT

(Write Protect) switch/Indicator

Diagnostic Keyboard

Liquid Crystal Display

DIAG MODE

(Diagnostic Mode) Switch

SPACE and BACK SPACE Switches

EXEC (Execute) Switch

The FAULT indicator is inside the Fault Clear switch. and it lights if a fault exists within the drive. It is turned off by any of the following (provided that the error condition or conditions no longer exist):

• Pressing the Fault Clear switch

• Fault Clear command from the controller

• A drive power up operation

The operation of the Write Protect swi tch or the Wri te Protect maintenance swi tch on the control board places the drive in the write protected mode (pre- venting write operations) and lights the WRITE PROT indicator. The current posi-

tion of the WRITE PROT switch is stored in memory when dc power is removed.

Used to enter diagnostic tests and parameters.

Displays drive status.

current cylinder address.

faults. and Places drive in diagnostic mode and disables the I/O.

Used to enter the desired diagnostic tests.

Starts and stops diagnostic tests.

Table Continued on Next Page

TABLE 2-1. DRIVE SWITCHES AND INDICATORS (Contd)

Switch or Indicator

. WP/N

.(Wr i te Protect/

Normal) Switch

Sector Select Switches

.8/1.6

(Sector Clock) Switch

Logical Address Switches

2 0 -2 3

R/L (Remote/Local) Switch

,

Function CONTROL BOARD

Placing the switch in the WP (write protect) position prevents the drive from performing write operations. The swi tch must be returned to the N (nor- mal) ~osition to enable write operations.

Allow the dividing of the disk into spec~

ific segments or sectors. The switch settings determine the number of sectors' per track (see Setting Sector Select Switches in section 3).

Placing the switch in the .8 position allows a sector clock frequency of 806 kHz. Placing the switch in the 1.6 po- sition allows a sector clock frequency of .1.6 MHz.

Switches 2 0 through 2 3 are used to set the logical address for drives without the status/control panel.

I/O BOARD

Controls whether the drive can be powered up from the controller (Remote) or the drive (Local). In both switch posi- tions. power up requires turning On the power supply On/Standby switch; however.

in the Remote position. a power sequence signal must come - from' the controller.

For drives with the status/control pan- el. the START switch must be activated whether the drive is in local or remote operation.

I/O BOARD

The R/L (Remote/Local) switch on the I/O board is set during drive installation according to instructions in section 3 of this manual (under Setting Circuit Board Switches).

OPERATING INSTRUCTIO"NS

GENERAL

For drives that have a status/control panel. operating instruc- tions are presented in the following sequence:

• Power On Procedure

• Power Off Procedure

For drives with no status/control panel. there are no operating procedures. On these drives. when the R/L (Remote/Local) switch is placed in the Remote position. spindle power on/power off is handled by the controller. In Remote operation. the power up sequence is delayed. The length of delay is deter- mined by the logical address number used. in increments of 5 seconds.

POWER ON PROCEDURE (DRIVES WITH STATUS/CONTROL PANEL)

The following procedure describes how to power up the drive.

It is assumed that dc power is available to the drive because the power supply On/Standby switch is normally left in the On (1) position. The R/L (Remote/Local) switch is located on the I/O board (_VRX).

NOTE

Drive power up is indicated by rapid flashing of the Ready indicator. This occurs. provided either of the following conditions exist:

• R/L (Remote/Local) switch is in Local

• R/L (Remote/Local) swi tch is in Remote and either sequence Pick or Hold (ground) is available from the controller

1. Press START switch. If the R/L (Remote/Local) swi~ch was set in the Remote position. the power up sequence contin- ues when the power sequence pick or Hold (ground) signal

is available from the controller. With the R/L (Remote/

Local) switch in Remote position. power up sequence to

2.

each drive is delayed. The length of delay is determined by the logic-al address number used. in increments of 5 seconds.

For example:

Logical Address 0 = 0 second delay Logical Address 7

=

35 second delay After the delay is completed.

cated in START switch) will that power up is in progress.

the Ready indicator (10-

flash rapidly. indicating 3. Observe that the Ready indicator lights steadily within 90 seconds. indicating that disks are up to speed and heads are loaded.

4. Ensure that the FAULT indicator is off.

The power up sequence is now complete. and the drive is ready to read or write data.

POWER OFF PROCEDURE (DRIVES WITH STATUS/CONTROL PANEL)

The foll~wing procedure describes how to power down the drive.

1. Press START switch.

2. Observe that the Ready indicator (located in START switch) flashes slowly, indicating that power down is in progress.

3. Observe that the Ready indicator goes off within 60 sec- onds. indicating that power down is complete.

with power down complete, the heads are positioned in the land- ing zone. and the disks are not rotating. Normally. the power supply On/Standby switch is left On (1 position) to continue supplying dc power to the drive.

FILTER REPLACEMENT AND CLEANING

GENERAL

The air filter must be clean to ensure proper air circulation through the drive. The filter is located behind the status/

control panel, as shown in figure 2-2. The operator should

~

FRONT PANEL

INSERT

Figure 2-2.

fRONT PANEL fILTER

11 f52

Air Filter Replacement

inspect the filter periodically 'and either replace or clean it when it is dirty. Cleaning the filter is recommended only if replacement filters are not available. The interval for filter maintenance depends on the operating environment. In computer room conditions. a 6-month interval is suggested. In other conditions. the filter should be checked more frequently.

FILTER REPLACEMENT

1. Remove front panel insert (see figure 2-2).

2. Remove screws securing status/control panel to front pan- el and move status/control panel away from front'panel to gain access to filter.

3. Remove old filter.

4. Install new filter.

5. Align status/control panel to front panel and secure with screws.

6. Replace front panel insert.

FILTER CLEANING

The filter should not be cleaned if replacement filters are available.

1. Remove front panel insert (see figure 2-2).

2. Remove screws securing status/control panel to front pan- el and move status/control panel away from front panel to gain access to filter.

3. Remove filter.

4. Clean filter be agitating in solution of water and mild detergent.

5. Rinse filter thor~ughly with clean running water and al- low to dry.

6. Install filter.

7. Align status/control panel to front panel and secure with screws.

8. Replace front panel insert.

SECTION 3

INSTALLATION AND CHECKOUT

INSTALLATION AND CHECKOUT 3

INTRODUCTION

The information contained in this section describes installa- tion and- initial checkout of the drive.

SITE REQUIREMENTS

GENERAL

The site requirements considered are electrostatic discharge protection. environment. space. power. grounding. and interface.

ELECTROSTATIC DISCHARGE PROTECTION

All drive electronic assemblies are sensitive to static elec- tricity. due to the electrostatically sensitive devices used wi thin the dr i ve c ircui try. Al though some of these devices such as metal-oxide semiconductors are extremely sensitive. all semiconductors as well as some resistors and capacitors may be damaged or degraded by exposure to static electricity.

Electrostatic damage to electronic devices may be caused by a direct discharge of a charged conductor. or by exposure to the static fields which surround charged objects. To avoid damage to drive electronic assemblies. service personnel must observe the following precautions when servicing the drive:

• Ground yourself to the drive whenever the drive electron- ics are or will be exposed. Connect yourself to ground with a wrist strap (refer to Accessories in section 4 for part numbers). Connection may be made to any metal as- sembly or to the ground lug at the rear of the drive. As a general rule. remember that you. the drive. and the circuit boards must all be at ground potential to avoid potentially damaging static discharges.

• Keep boards in conductive bags - when circuit boards are not installed in the drive. keep them in conductive stat- ic shielding bags (refer to Accessories in section 4 for part numbers).

These bags provide absolute protection from' direct static dis- charge and from static fields 'surrounding charged objects.

Remember that these bags are conductive and should not be placed where they might cause an electrical short circuit.

• Remove boards from bags only when you are grounded - all boards received from the factory are in static shielding bags. and should not be removed unless you are grounded.

• Turn off power to drive before removing or installing any

circuit boards. .

• Never use an ohmmeter on any circuit boards.

ENVIRONMENTAL REQUIREMENTS

All environmental requirements for the drive are -listed in table 3-1.

TABLE 3-1. ENVIRONMENTAL REQUIREMENTS

Conditions Characteristics Specifications TEMPERATURE

Storage Range -10 to 50°C

(14 to 122°F) Maximum change 15°C (27°F)

per hour

Transit Range -40 to 60°C

(-40 to 140°F) Maximum change 20°C (36°F)

per hour

Table Continued on Next Page

TABLE 3-1. ENVIRONMENTAL REQUIREMENTS (Contd)

Conditions

Operating

Range Range Range

Range

Characteristics Specifications TEMPERATURE (Contd)

Range

Maximum change per hour Gradient

10°C to 45°C (50 to 113°F)

RELATIVE HUMIDITY Storage

Transit

Non-operating

Normal Operating

Extended Operating ¹

10% to 90%

5% to 95%

20% to 80%

10% per hour maximum change (no conden- sation allowed).

20% to 80%

10% per hour maximum change (no conden- sation allowed).

10% to 90%

Table Continued on Next Page

TABLE 3-1. ENVIRONMENTAL REQUIREMENTS (Contd)

Conditions Characteristics Specifications

1

Range

Range

Range

BAROMETRIC PRESSURE (STANDARD DAY) Storage/

Non-Operating

Transit

Operating

'.

-305 m to 3000 m

(-1000 ft to 10 000 ft) 104 kPa to 69 kPa (30 in to 20 in Hg)

-305

m

to 12 192

m

(-1000 ft to 40 000 ft) 104 kPa to 19 kPa (30 in Hg to 6 in Hg) -305

m

to 3000

m

(-1000 ft to 10 000 ft) 104 kPa to 69 kPa

(30 in Hg to 20 in Hg)

When the drive is operated within the extended range

limits specified, it will not incur damage but may not meet performance specifications.

SPACE REQUIREMENTS

The drive and power supply mount side-by-side with another drive and power supply into a 2X drawer, and the 2X drawer slide mounts into a 483 mm (19 in) standard rack. The slide action allows outward extension of the drawer for ease of main- tenance. The space requirements are shown in figure 3-1.

The combined mass of the drive and power supply is 15.2 kg (32 lbs). With both units mounted in the drawer and the drawer extended on the slides, the center of gravity is approximately 32 cm (12.5 in) from the rack front.

TOP VIEW

,.. 216 ••

B.SO in.

1

^37LJIIII

I---..~_---']

^in.

L - -

.J---r-t

^{43 mm}

^~

1.7LJ in.ill

TOP VIEW I.

,.. 210.. _, 8.25 in.

121

t

11111

4.75 in.

L~---,-ro--,

FRONT VIEW SIDE VIEW

POWER SUPPLY

L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

DRIVE

~

t

121 1111

LJ.7S in.

~----'-'~

FRONl VIEW

NOTES:

&

COOlIN6 fAN HOUNTS ON REAR PANEL WHEN POWER SUPPLY IS NOT HOUNTED IN LINE W1TH DRIVE.

562. 111m

2.10 in.

If, ⁼⁼⁼⁼ⁱ

~ _ _ _ _ _ _ _ _ ^~.L J.. _ _ _ _ -'

~,.

^{10 11m}

0.40 in.

SIDE VIEW

~ COOLIN6 fAN IS INSIDE POWER SUPPLY

3 DIMENSIONS ARE NOHINAL. _1HLJO

Figure 3-1. Drive Space Requirements

POWER REQUIREMENTS

Normal Requirements

Drive ac power requirements are listed in table 3-2. Conver- sion to the different line voltages is explained in the instal- lationprocedures. Typical drive current versus start-up time is shown in figure 3-2 for 100-120 and" 208-240 volt connections.

TABLE 3-2. POWER REQUIREMENTS

Specifications Voltage Range Nominal Line Frequenc;:y

Frequency Range Phase

Requirements Power Consumed*

Line Current*

Power Factor*

Start Up Current

NOMINAL VALUES

100 - 120 V ac 208 - 240 V ac 85 to 132 V 177 to 264 V

50/60 Hz 50/60 Hz

48.0 to 62."0 Hz 48.0 to 62.0 Hz Single Phase Single Phase 0.135 - 0.140 kW 0.135 - 0.140 kW 2.2 - 2.0 A 1.3 - 1.2 A 0.613 -'0.583 0.499 - 0.486 See figure 3-2. See figure 3-2.

*Measured at nominal values when disks are rotating and carriage is moving.

o

o

.-' -'.1

1 C 0

^{~, 1----,' ~ ~}

,

--

""""""'-

~,..

'.i ^~

~

.'

~

--

^{I-o-~ ....}

...-"'" _\

^'--

1\ 1 20 ^V

5

10 15 20 -25

2( 8 V, ,

-'---

t/

^~

2q ₀

-

5

10

START-UP-TIME (SECONDS)

~

\

100-

--

^~,....;

^~

~

^/

V

WI

15 20 START-UP-TIME

(SECONDS)

...

25

3.0 2.5

__ -I

^{1--. ,,"_,}

^2.0

1.5

1.0 .5

30

35

3.0 2.5 2.0

1.5

-- --

^-~

^1.0

.5

30 35 11

fq

1

Figure 3-2. Typical Line Current Versus Start-up Time

I.

^WARNING'

J

If power to the unit originates from a 3-phase. 4-wire. wye branch or feeder circuit.

always ensure that the circui t meets the re- quirements given in the following topic.

These requirements must be met in the United States. in order to comply with the National Electrical Code. and are recommended for in- stallations in other countries. Failure to meet these requirements may resul t in hazard- ous conditions due to high currents (and heat- ing) in the neutral conductors and transform- ers supplying the system.

Special Requirements for 3-Phase, 4-Wire Wye Site Power General

This uni t uses single-phase power. If the power originates from a 3-phase. 4-wire. wye branch or feeder circuit ensure that the circuit meets the following specifications (see pre- ceding warning).

Specifications for Neutral Conductor

Always consider the. neutral in the 3-phase. wye circuit as a current carrying conductor and ensure that it is large enough to have at least 175% of the rating of the line conductors.

Limiting Branch and Feeder Circuit Load Currents

The size of the neutral conductor determines the maximum load current allow"ed in each 3-phase. wye conductor (lines and neu- tral). If the neutral in the 3-phase. wye circuit has at least 175% the rating of the line conductors. limit the maximum load current in each conductor (lines and neutral) to the values shown in table 3-3.' If the neutral is not 175% as large as the line conductors but is at least the same size (which is the minimum acceptable). limit current as shown in table 3-4.

TABLE 3-3. LOAD CURRENT LIMITS WITH LARGER NEUTRAL

Number of Conductors in Limit to"this Percentage of Conduit. Cable or Raceway Value Specified by NEC* or

Local or National Regulations

4 through 6 80%

7 through 24 70%

25 through 42 60%

43 and above 50%

* United States National Electrical Code.

TABLE 3-4. LOAD CURRENT LIMITS WITH SAME SIZE NEUTRAL

Number of Conductors in Limit to this Percentage of Conduit. Cable or Raceway Value Specified by NEC* or

Local or National Regulations

4 through 6 70%

7 through 24 61%

25 through 42 53%

43 and above 44%

* United States National El'ectrical Code.

Transformers

If over one half of the load consists of equipment containing swi tching power supplies. derate the power transformer to 70%

of its nameplate rating. Ensure that input protection to the transformer does not allow more than 70% of the normal (name- plate) full load primary current rating. Connect the individu- al neutral leads from the transformer secondary coils directly to a neutral bus or connection strap which is large enough to carry at least 175% of the total secondary load current.

GROUNDING REQUIREMENTS General

Safety grounding (connecting the drive power cord to a grounded outlet) and system grounding (establishing a common ground be- tween the drives, the power supplies, and the controller) are discussed in the following paragraphs.

Safety Grounding

A safety ground must be provided by the site ac power system.

The green (or green and yellow striped) wire in· the drivels power cord provides the safety ground connection between the power supply and the site power system. In turn, the site ac power system must tie this connection (safety ground) to earth ground. All site ac power connection points, including conve- nience outlets for test equipment, must be maintained at the same safety ground potential.

System Grounding

In addition to safety grounding, system ground connections are also required. System ground is established by a set of ground straps connected in a star or daisy chain configuration. The ground straps connect gtound on the controller to earth ground and to each drive in the system. The installation procedures in this section provide detailed grounding instructions and a schematic diagram of the star and daisy chain configurations.

INTERFACE REQUIREMENTS

An important part of si te preparation is planning the layout and routing of I/O cables. The I/O cables are designated as A and B cables. The I/O A cables may be connected in ei ther a star or daisy chain configuration as shown in figure 3-3. Each configuration calls for the use of terminators; these too are shown in figure 3-3.

The following discussion of the I/O configurations applies to single channel installations where a set of drives are inter- faced to one controller. Extending the discussion to dual channel installations (involving two controllers) requires doubling the quantities of cables and terminators because the two channels have independent cabling.

STAR CABLED SYSTEM CONTROLLER t

A B A ^B A B A B

T

T

T T

E E E E

R R R R

rA1

^{I -t1}

rBl rAl

^~

IB1 fAl -

^t1

JBl rA1 ^-

^M

rB1

JOq J03 J02 J04 J03 J02 JOq JO. J02 JOIl J03 J02 ___ ^Qi~I __ - - - - £!j~I __ - ^{I- _ _ CH~I} ___ _ __ ^£!j~I __ -

DRIVE 0 DRIVE 1 DRIVE 2 DRIVE N

---

CH. 2

---

CH. 2

^1---

CH. 2

---

CH. 2

JOLJ J03 J02 JOLJ J03 J02 JOLJ J03 J02 JOlJ J03 J02

Lli r

^{LU LLJ}

7

^{LB) L~}

T

^{LBJ L~}

1"

^LB)

E E E E

R R R R

Ji Ji "J! Ji

A B A B A 8 A 8

CONTROLLER II NOTES:

I. MAXIMUM INDIVIDUAl LENGTHS: 100 fEET (STAR)

2. MAXIMUM CUNULATIVE A CABLE LENGTHS = 100 rEET (DAISY CHAIN) 3. MAXIMUM INDIVIDUAl B CABLE LENGTHS: SO fEET

q. A SYSTEM HAY INCLUDE UP TO 16 DRIVES

A B

__ ^Qi~I_­

DRIVE 0

--CH'.2--

A B

DAISY CHAIN CABLED SYSTEM CONTROLLER 1

B B

__ ^£!j~I_­

DRIVE 1 --CH."'2--

__ ^Qi~I_­

DRIVE 2

--CH'.2--

B

CDNTROLLER II

8

B

_ _ ^£!j~I __

DRIVE N --CH."2--

8

Figure 3-3. System Cabling

DUAL CHANNEL UNITS ONLY

DUAL CHANNEl UNITS ONLY

11Fq2

The star configuration has individual A and B cables going from the controller to each drive. and each drive has a terminator installed on it. The daisy chain configu~ation has individual B cables going from the controller to each drive. However. a single A cable connects the controller ~o the first drive.

Other A cables go from drive to drive. and the last drive in the string has ~terminator installed on it.

In estimating the I/O cables needed for an installation. decide which configuration will be used and allow sufficient length to permit extension of rack-mounted drives. Limitations on I/O cable lengths may influence system layout. The maximum length for each B cable is 15.3 m (50 ft). Each star system A cable or the cumulative A cabling in a daisy chain system cannot ex~

ceed 30.6 m (100 ft) in length. Refer to Accessories in sec- tion4 for terminator and I/O cable part numbers.

Figure 3-4 shows the pin assignments and signal names for the A cable. Figure 3-5 shows the pin assignments and signal names for the B cable. Detailed information about interface lines is given in section 1 of hardware maintenance manual. volume 2.

UNPACKAGING, INSPECTION AND REPACKAGING GENERAL

After removing packaging material according to the unpackaging instructions provided with the drive. inspec.tion for shipping damage should be carried out and several final unpackaging pro- cedures performed. Save all packaging materials for future use.

UNPACKAGING

1. Open package (save all packaging materials).

2. If drive has.a 2X drawer ~ith slide mount option. remove packages containing drawer. two slide mounts and slide mount hardware kit.

3. Remove package containing ac power cable and dc power cable.

4. Remove plastic dust cover from around drive and power supply.

5. Check all items against shipping bill for required equip- ment and hardware to complete installation. Discrepan- cies. missing items. damaged equipment. etc .• should be reported to the CDC account sales representative respons- ible for the equipment.

CONTROLLER

UN]T SELECT TAG UN]T SELECT B]T 0 UN]T SELECT BIT

1

UNIT SELECT BIT

2

UNIT SELECT B]T

3 A

TAG

1 Ir>..,

TAG 2

L~

TAG

3 ^{J r>..,}

BUS OUT B]T 0

^j~

BUS OUT Bll

1 1~

BUS OUT B]T

2 J~

BUS OUT Bll

3 L~

BUS OUT BIT

Ll L~

BUS OUT Bll

5 It\.

BUS OUT B]T

6 J ~\

BUS OUT Bll

7 J~

BUS OUT BIT

8 L~

BUS OUT BIT

9 Lr:-..

OPEN CABLE DETECT BUS ]N Bll 0

IA

BUS ]N Bll

1 I~

BUS ]N Bll

2 It\.

BUS IN Bll

3 I~

BUS IN Bll

Ll I~

BUS IN BIT

5 It\.

BUS IN Bll

6 It\. .A\

BUS IN BIT

7 It\. A\

SEQUENCE PICK IN/OUT SEQUENCE HOLD

BUSY

IA

TAG

q .&

NOTES:

~ DUAL CHANNEL UNITS ONLY

~

GATED BY UNIT SELECT

~ INDEX AND SECTOR NAY BE IN wAw CABLE, wB w CABLE, OR BOTH.

~

fUNCTIONS AS TAG 5 L]NE fOLLOWING UNIT SELECTION.

..

LO, HI DRIVE

22. 52

23, 53 2Ll 5Ll 26, 56 27, 57 L 31 2, 32

3L 33 4. 3Ll 5, 35 6, 36 7 37 8, 38 9. 39 10, 40 11 q1 12, q2 13, q3 1Q, QLl 19, 49 17. Q7 16, q6 15, Ll5 28. 58 20, 50 18, 48 25, 55

29

ONE

59

}TW]STED

~ 21. 51

PAIR

30. 60

FUNCTIONS AS CYLINDER ADDRESS BIT 2

¹⁰

LINE, WHEN OPERATING WITH TAG 1 EXTENDED ADDRESSING FEATURE.

ISMD-E SIGNAL DEFINITIONSI

11 Fq3

Figure 3-4. A Cable (Sheet 1 of 2)