Text preview for : A22-6862-4_2400_Series_Magnetic_Tape_Units_OEM.pdf part of IBM A22-6862-4 2400 Series Magnetic Tape Units OEM IBM 24xx A22-6862-4_2400_Series_Magnetic_Tape_Units_OEM.pdf
Back to : A22-6862-4_2400_Series_Ma | Home
File No. 8360-19
Form A22-6862-4
Systems Reference Library
I IBM 2400-Series Magnetic Tape Units
Original Equipment Manufacturers' Information
This manual will assist designers of accessory equipment for IBM 2401
and 2402 Models 1-6 Magnetic Tape Units, IBM 2403 Models 1-6 and
2404 Models 1-3 Magnetic Tape Units and Controls, and IBM 2803/2804
Models 1 and 2 Tape Control Units.
Additional information about the operation and use of these tape units
in integrated data processing systems can be obtained from the IBM 2400
Magnetic Tape Units and 2816 Switching Unit Component Description,
Form A22-6866, and from the local IBM Sales Office. Information con-
Icerning I/O operations is in IBM System/360 Channel to Control Unit
OEMI, Form A22-6843.
Preface
The term "2400-series magnetic tape units" used in this
manual refers to the 2401 and 2402 Models 1-6 Magnetic
Tape Units, the 2403 Models 1-6 Magnetic Tape Unit and
Control, the 2404 Models 1-3 Magnetic Tape Unit and Con-
trol, and the 2803/2804 Models 1 and 2 Tape Control
Units. Information in this manual pertains to Models 1-6
of the 2400 series, unless otherwise specified.
The IBM 2415 Magnetic Tape Unit and Control contains
two, four, or six tape drives and a control in a single unit.
The drives and control are not marketed separately. There-
fore, the 2415 control-to-drive interface is not described in
in this manual. Tape timings for the 2415 are listed in the
IBM 2400 Magnetic Tape Units and 2816 Switching Unit
Component Description, Form A22-6866.
Fifth Edition
This edition, Form A22-6862-4, obsoletes Form A22-6862-3 and Technical Newsletter
N22-0264. Significant changes have been made throughout the manual, and this new
edition should be reviewed in its entirety.
Specifications contained herein are subject to change from time to time. Any such
change will be reported in subsequent revisions or Technical Newsletters.
Requests for copies of IBM publications should be made to your IBM representative or to
the IBM branch office serving your locality.
This manual has been prepared by the IBM Systems Development Division, Product Publi-
cations, Dept. 265, P.O. Box 1900, Boulder, Colorado 80302. Address comments con-
cerning the manual to this address.
Contents
IBM 2400-Series Magnetic Tape Units .7 Specifications . 16
Recording Methods . .8 Input/Output Line Specifications 16
Error Correction .8 Connector Pin Assignments 16
Operator's Controls and Indicators .8 Mode'Compatibility Feature 16
Operator's Panel .8 Simultaneous Read/Write Feature 16
Tape Unit Specifications 19
Input/Output Signal Lines. 12 Read/Write Head 19
Input Lines 12 Tape Speed, Bit Density, and Byte Rate 19
Select (TC77, 79, 86, 88, 97, 99, 106, and 108) 12 2400-Series Tape Timings 19
Go (TC9) 12 Power Requirements 21
Backward (TC11) 12 Machine Protection 21
Set Read Status (TC25) 12 File Protection 21
Set Write Status (TC13) 12 Tape Motion Start and Stop Times 21
Write Pulse (TC29) 12 Read Circuits 21
Write LRCC Gate/Set NRZI (TC27) 13 Noise 21
Write Bus (TC3, 5, 17, 19, 21, 31, 33, 35, and 1) 13 Tape Operating Environment 22
Rewind (TC39) 13 Recording Formats for Nine-Track, BOO-bpi Tape 22
Rewind/Unload (TC41) 13 Recording Formats for Nine-Track, 1,600-bpi Tape 29
Metering Out (TC23) 13 Recording Formats for Seven-Track Tape 30
Output Lines 13 Cabling 30
Models 1/4, 2/5, 3/6 (TC180, 182, and 184) 13 Connectors 33
Rewinding/Not Ready (TC142, 144, 156, 158, 172, 174, Drivers and Terminators 34
186, and 188) 13
Seven Track/NRZI (TC178) 13
Select and Read Status (TC162) 13
Select and at Load Point (TC198) 14
Write Echo/Select and TI Off (TC196) 14 Field Tester 43
Select and TI Off/Inhibit Go (TC194) 14 Field Tester Controls and Signal Hubs 43
Select and Not File-Protected (TC192) 14 Switches 43
Read Bus (TC84, 93, 95, 102, 104, 113, 115, 122, and 82) . 14 Variable Controls 44
Backward Status (TC164) 14 Signal Hubs 44
2400-Series Models 1, 2, and 3 (TC37) 14 Control Settings 44
Illustrations
Figure Title Page Figure Title Page
IBM 2400-Series Magnetic Tape Units 24 Read Backward Checking of Nine-Track
I NRZI Write Operation . 29
IBM 2400-Series Magnetic Tape. Unit Characteristics. 7
2 IBM 2400-Series Tape Unit Packaging 25 2400 Cabling Schematic 31
7
3 PE and NRZI Recording Compared 26 2400 Cabling Schematic Data . 32
9
4 IBM 2401/2402 Operator's Panel. 10 27 2401/2/3/4 Connector and Component
Part Numbers 33
28 Line Terminator, Models 1-6 34
Input/Output Signal Lines
29 Write Bus Terminator, Models 4-6 34
5 Rotation of Select (and Not Ready) Signal Lines 12 Tape Unit, Models 1-6, Metering-Out Line
30
6 PE and NRZI Bit Patterns on Tape 14 34
Termination .
31 Tape Unit, Models 1-6, Line Driver 34
Specifications 34
32 Control Unit, Models 1-6, Line Receive! .
7 Tape Unit Input Line Specifications 16 33 Control Unit, Models 1 and 2, Signal Line Driver;
8 Tape Unit Output Line Specifications 16 Control Unit, Modell, Write Bus Driver. 34
9 Tape Unit/Control Unit Connector Pin 34 Tape Unit, Models 1-6, Line Receiver; Tape Unit,
Assignments . 17 Models 1-3, Write Bus Receiver 34
10 2402 Tail Gate Connectors 17 .35 Control Unit, Model 2, Write Bus Driver . 35
11 2403/2803 Signal and Power Connectors 18 36 Tape Unit, Models 4-6, Write Bus ~eceiver 35
12 ACPower Connector Pin Numbering. 19 37 Tape Unit Read Preamplifier Number 2, Models
13 Tape Unit/Control Unit Connector Pin 1-3 and 4-6 NRZI 36
Assignments with Simultaneous Feature . 20 38 Simultaneous Preamplifier, Models 4-6 NRZI 37
14 Start/Stop Timings . 22 39 Simultaneous Preamplifier, Models 4-6 PE 37
15 PE Read Bus Waveforms (Data Pattern 11001100) . 23 40 Control Unit Read Bus, Models 1 and 2,
16 NRZI Read Bus Waveform (Nine Track) . 24 Receiver NRZI 38
17 Noise. 24 41 Tape Unit Read Preamplifier, Model 4 PE 39
18 Beginning-of-Tape and End-of-Tape Areas 25 42 Tape Unit Read Preamplifier, Model 5 PE 40
19 Track Spacing for Seven- and Nine-Track Tape 26 43 Tape Unit Read Preamplifier, Model 6 PE 41
20 Data Block Format. 27 44 Control Unit, Model 2, Read Bus Receiver PE 42
21 Tape Mark Block Format 28
22 Organization of Blocks on Tape 28 Field Tester
23 Skew Gate and Character Gate Timings-Nine- 45 2400-Series Models 1-6 Field Tape Tester 43
Track NRZI (2803-2) 29 46 Field Tape Tester Control Settings 45
Abbreviations
amp ampere rna milliampere
asm assembly ms millisecond
BCD binary coded decimal mv millivolt
bkwd backward NFP not file protect
B/M bill of material NRZI nonreturn to zero IBM
bpi bits per inch P parity
CB circuit breaker PE phase encoding
CE customer engineer R/W read/write
cm centimeter sec second
CRC cyclic redundancy check SLT solid logic technology
CV control unit SV switching unit
EBCDIC extended binary coded decimal TC tape connector
ihterchange code TCV tape control unit
EOF end of file TI tape indicate
EaT end of tape TV tape unit
EPa emergency power off usec microsecond
F fahrenheit v volt
fwd forward vac volts alternating current
HD heavy duty vdc volts direct current
IBG interblock gap VRC vertical redundancy check
ips inches per second > greater than
kb thousands of eight-bit bytes < less than
kd thousands of four-bit decimal digits ~ equal to or greater than
LP load point ~ equal to or less than
LRC longitudinal redundancy check