Black Box IC496A-R2 Manuale utente
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
OCTOBER 2001
IC496A-R2 IC496AE-R2
IC497A IC497AE
IC498A IC498AE
IC499A IC499AE
SCSI Repeaters
SCSI REPEATER
1
FCC/IC RFI STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA
RADIO-FREQUENCY INTERFERENCE STATEMENTS
Class B Digital Device. This equipment has been tested and found to comply with
the limits for a Class B computing device pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation. However, there is no guarantee that
interference will not occur in a particular installation. This equipment generates,
uses, and can radiate radio frequency energy, and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. If this equipment does cause harmful interference to radio or
telephone reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult an experienced radio/TV technician for help.
Caution:
Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate
the equipment.
To meet FCC requirements, you should use shielded cables and power cords to
connect this device to a personal computer or other Class B certified device.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital
apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
2
SCSI REPEATERS
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de
que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que
sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá
a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser
referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,
alfombra o superficie similar puede bloquea la ventilación, no se debe colocar
en libreros o gabinetes que impidan el flujo de aire por los orificios de
ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el aparato.
3
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización
del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen del
aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas
de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
EUROPEAN UNION DECLARATION OF CONFORMITY
This equipment complies with the requirements of the European EMC Directive
89/336/EEC.
NOM STATEMENT, EU DECLARATION OF CONFORMITY
4
SCSI REPEATERS
Contents
Chapter Page
1. Specifications ............................................................................................. 5
2. Introduction ............................................................................................... 8
2.1 Overview .............................................................................................. 8
2.2 Features ............................................................................................... 9
3. Installation ................................................................................................ 10
3.1 The Complete Package ..................................................................... 10
3.2 Placement .......................................................................................... 10
3.3 The Installation Procedure .............................................................. 11
3.3.1 Attaching the AC Power Supply ............................................. 11
3.3.2 Connecting the SCSI Repeater to the SCSI Bus ................... 11
3.3.3 Ensuring Proper Termination ............................................... 12
3.3.4 Powering Up the System ........................................................ 12
4. Operation and Troubleshooting ............................................................ 13
4.1 Monitoring the LED ......................................................................... 13
4.2 Contacting Black Box ....................................................................... 13
4.3 Shipping and Packaging ................................................................... 14
Appendix A: Pinouts ....................................................................................... 15
A.1 50-Pin Narrow Single-Ended SCSI Ports
(IC496 and IC497 Models) ............................................................ 15
A.2 68-Pin Wide Single-Ended SCSI Ports (IC498 Models) .................. 16
A.3 68-Pin LVD SCSI Ports (IC499A) ..................................................... 17
A.4 Power Connector .............................................................................. 18
Appendix B: SCSI Technical Information .................................................... 19
B.1 SCSI Basics ......................................................................................... 19
B.2 SCSI Installation Tips ....................................................................... 21
B.3 SCSI Signal Descriptions .................................................................. 22
B.4 Device and Distance Support By Bus Type ...................................... 23
5
CHAPTER 1: Specifications
1. Specifications
Compliance — CE; FCC Part 15 Subpart J Class B, IC Class/classe B
Standards — ANSI X3.131 and X3T9.2
Interfaces — IC496 and IC497 models: Narrow SCSI-1 and SCSI-2
single-ended;
IC498 models: Wide SCSI-2 and Ultra SCSI (SCSI-3)
single-ended;
IC499 models: Wide Ultra2 SCSI LVD
Protocol — Synchronous or asynchronous
Maximum
Data Rate — IC496 and IC497 models: 20 MBps;
IC498 models: 40 MBps;
IC499 models: 80 MBps
Maximum
Signal Delay — IC499 models: 10 ns;
All other models: 15 ns
Maximum
Signal Slew — 3 ns
Maximum
Distance — IC496 and IC497 models:
From each port to the most distant directly attached
device:
6 m (19.7 ft.) at 5 MBps,
3 m (9.8 ft.) at 10 MBps, or
1.5 m (4.9 ft.) at 20 MBps;
Up to 3 units can be installed on one bus to extend
total bus length up to 24 m (78.7 ft.), 12 m (39.4 ft.),
or 6 m (19.7 ft.) respectively;
6
SCSI REPEATERS
Maximum
Distance (cont’d) — IC498 models:
From each port to the most distant directly attached
device:
6 m (19.7 ft.) at 10 MBps,
3 m (9.8 ft.) at 20 MBps or (with four or fewer
devices) at 40 MBps, or
1.5 m (4.9 ft.) with more than four devices at
40 MBps;
Up to 3 units can be installed on one bus to extend
total bus length up to 24 m (78.7 ft.), 12 m (39.4 ft.),
or 6 m (19.7 ft.) respectively;
IC499 models:
Point-to-point (only two other devices on the bus):
82 ft. (25 m) from each port to each directly
attached device;
Multipoint (more than two other devices on the bus):
39.4 ft. (12 m) from each port to the most distant
directly attached device;
Up to 2 units can be installed on one bus to extend
total bus length up to 246 ft. (75 m) or 118 ft. (36 m)
respectively
SCSI ID — None required
Termination — Active internal or external (user-selectable)
Internal Terminator
Power — 1 amp; internal resettable fuse will provide 5 VDC at
1 amp
User Controls —(2) Side-mounted slide switches: Internal vs. external
termination
Indicator — (1) Unlabeled Power/Activity LED
Connectors — All models: (1) 5-pin mini-DIN female power jack;
IC496 models: (2) 50-pin Centronics®female;
IC497 models: (2) Micro D50 (50-pin high-density)
female;
IC498 models and IC499A: (2) Micro D68 (68-pin high-
density) female
7
CHAPTER 1: Specifications
Power — IC496A-R2, IC497A, and IC498A:
From wallmount power supply:
Optimal Input: 115 VAC, 60 Hz;
Input Range: 103.5 to 126.5 VAC, 48 to 65 Hz;
Input Current Rating: 0.25 amps;
Output: 12 VDC at up to 1 amp;
IC496AE-R2, IC497AE, and IC498AE:
From desktop power supply:
Optimal Input: 220 VAC, 50 Hz;
Input Range: 198 to 242 VAC, 48 to 65 Hz;
Input Current Rating: 0.25 amps;
Output: 12 VDC at up to 1 amp;
IC499A:
From wallmount power supply:
Optimal Input: 115 VAC, 60 Hz;
Input Range: 103.5 to 126.5 VAC, 48 to 65 Hz;
Input Current Rating: 0.25 amps;
Output: 6 to 12 VDC at up to 1.3 amps
IC499AE:
From desktop power supply:
Optimal Input: 230 VAC, 50 Hz;
Input Current Rating: 110 mA
Output: 12 VDC at up to 1 amp
MTBF — 50,000 hours
Temperature
Tolerance — 32 to 131˚F (0 to 55˚C)
Humidity
Tolerance — Up to 90% noncondensing
Size — 1.1"H x 3.4"W x 4.7"D (2.8 x 8.6 x 11.9 cm)
Weight — 1 lb. (0.5 kg)
8
SCSI REPEATERS
2. Introduction
NOTE
If you’re not very familiar with how SCSI works or with the
characteristics of its different varieties, please read the technical
information in Appendix B. It might help you (a) confirm that you have
the proper Repeater and (b) prevent installation and operation problems.
2.1 Overview
Your new SCSI Repeater gives you the freedom to extend the distance of any LVD
SCSI bus (IC499 models) or single-ended SCSI bus (all other models) beyond the
standard distance limits. It’s a low-cost data repeater that plugs in-line on a SCSI
chain, regenerating and reconditioning the data signal, doubling the distance your
data can travel, and giving you the flexibility to install your SCSI peripherals
wherever you need them most (see Figure 2-1).
Figure 2-1. One SCSI Repeater doubles the distance of a SCSI bus.
In fact, you can link as many as three IC496, IC497, or IC498 model SCSI
Repeaters to a single SCSI-1, SCSI-2, or Ultra SCSI (SCSI-3) bus in order to place
disk drives, tape peripherals, CD-ROM drives, or laser printers up to 24 m (78.7 ft.)
away from the host computer (see Figure 2-2 on the next page). Or you can link as
many as two SCSI LVD Repeaters (IC499 models) to an Ultra2 SCSI bus to place
one such devices as much as 246 ft. (75 m) from the host computer, or two or
more such devices as much as 118 ft. (36 m) from the host computer.
NOTE
The maximum distance attainable in an IC496, IC497, or IC498 model
SCSI Repeater system depends on whether the bus is narrow or wide,
how many devices are on it, and how high the data rate is. See
Section 3.3.2 and Section B.4.
At 5 MBps, single-ended SCSI bus extended to as
much as 12 m (39.4 ft.) with a single Repeater
Multipoint LVD SCSI bus extended to as
much as 24 m (78.7 ft.) with a single Repeater
Computer with
SCSI host adapter
SCSI Repeater
SCSI
storage
devices
9
Figure 2-2. Daisychain SCSI Repeaters for more distance (DOS/Windows®
drive-letter assignments shown).
Three basic types of the SCSI Repeater are available. One supports “narrow” (8-bit)
single-ended SCSI devices, the second supports “wide” (16-bit) single-ended SCSI
devices, and the third supports low-voltage differential (LVD) SCSI devices. All
three Repeater types can double the distance of your SCSI bus.
2.2 Features
• Doubles SCSI-bus distance.
• Maximum data rate of 20 (narrow single-ended), 40 (wide single-ended), or
80 (LVD) Mbps.
• Compatible with synchronous and asynchronous applications.
• User-installable.
• Transparent to SCSI controllers and peripherals.
• Internal active bus termination.
• No software required.
• IC496 and IC497 models are compatible with SCSI-1 and SCSI-2; IC498 models
are compatible with SCSI-2 and Ultra SCSI (SCSI-3); and IC499 models are
compatible with Ultra2 SCSI.
• Conforms to ANSI X3.131 and X3T9.2 SCSI specifications.
CHAPTER 2: Introduction
Multipoint LVD SCSI bus extended to as much as 36 m
(118.1 ft.) or single-ended SCSI bus extended to as much
as 18 m (59.1 ft.) with two Repeaters—a third Repeater
could extend the single-ended range to the maximum
24 m (78.7 ft.)
Tape
drive
(D:)
Zip®
drive
(B:)
Computer with
3.5" drive (A:)
and hard drive
(C:)
Tape
drive (E:)
DVD-ROM
drive (G:)
CD-ROM
tower
(F:)
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