Black Box Ultra 2 Manual de usuario
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INFORMATION
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AUGUST 2000
IC541A
Ultra 2 SCSI LVD/HVD
Multimode Expander
Ultra2 SCSI LVD/HVD
Multimode Expander
1
FCC/IC 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.
This digital apparatus does not exceed the Class B 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 B prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
2
ULTRA2 SCSI LVD/HVD MULTIMODE EXPANDER
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
NOM STATEMENT
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.
4
ULTRA2 SCSI LVD/HVD MULTIMODE EXPANDER
Contents
Chapter Page
1. Specifications ............................................................................................. 5
2. Introduction ............................................................................................... 6
2.1 Overview .............................................................................................. 6
2.2 Features ............................................................................................... 8
2.3 The Complete Package ....................................................................... 8
3. Configuration and Internal LEDs ............................................................. 9
3.1 Opening the Expander ....................................................................... 9
3.2 Configuring Termination ................................................................. 11
4. Installation ................................................................................................ 14
4.1 Connecting the SCSI-Bus Cables ..................................................... 14
4.2 Connecting AC Power and Observing the External LEDs ............. 15
5. Applications .............................................................................................. 16
5.1 Applications That Will Work ............................................................ 16
5.2 Applications That Won’t Work ........................................................ 18
6. Troubleshooting ...................................................................................... 19
6.1 Calling Black Box .............................................................................. 19
6.2 Shipping and Packaging ................................................................... 19
Appendix A: Port Pinouts ............................................................................... 20
A.1 High-Voltage Differential (HVD) Pinout ........................................ 20
A.2 Low-Voltage Differential (LVD) Pinout ........................................... 20
A.3 Single-Ended (SE) Pinout ................................................................. 22
Appendix B: Block Diagram .......................................................................... 24
5
CHAPTER 1: Specifications
1. Specifications
Compliance — FCC Part 15 Subpart J Class B, IC Class/classe B
Interfaces — LVD/SE port: Wide (16-bit) Ultra2 SCSI (“Fast 40”),
multimode (can be either LVD or single-ended,
autosensing);
HVD port: Wide (16-bit) Ultra SCSI, high-voltage
differential
Protocol — Transparent to synchronous or asynchronous
communication
Data Rate — LVD: Up to 80 Megabytes per second
Maximum
Distance — Can extend HVD SCSI bus as far as 37 m (121.3 ft.)
User Controls — (4) Internal jumpers for termination
Indicators — (2) Front-mounted LEDs: Power and Busy
Connectors — (2) Micro D68 female (see Appendix A for pinouts)
Power — 110 to 220 VAC, 50 to 60 Hz (autosensing)
Size — 2.9"H x 4.8"W x 7.8"D (7.4 x 12.2 x 19.8 cm)
Weight — 3.3 lb. (1.5 kg)
6
ULTRA2 SCSI LVD/HVD MULTIMODE EXPANDER
2. Introduction
2.1 Overview
The Ultra2 SCSI LVD/HVD Multimode Expander is a 16-bit Wide SCSI Low
Voltage Differential (LVD) to High Voltage Differential (HVD) converter. The
Expander effectively divides the SCSI bus into one LVD or SE (single-ended)
segment (connected to its “LVD/SE” port) and an HVD segment (connected to its
“HVD” port). The Expander translates signals, and facilitates communication,
between the segments.
When used in conjunction with an Ultra2 SCSI host adapter, the Expander
maintains backward compatibility with previous generations of devices on HVD
segments, while retaining the optimal performance and maximum cable length of
LVD. The Expander can also be used with an Ultra SCSI (“SCSI-3,” 40-MB-per-
second) HVD host adapter to add Ultra2 devices to its bus. Because it performs
only signal-level translation, the Expander operates transparently; users will hardly
know it’s there. It places no limits on the quantity or location of SCSI devices
beyond the normal limits of the SCSI specification.
The Expander’s LVD/SE port is “multimode,” meaning it can operate in either
single-ended or LVD mode. (This selection is controlled automatically by a sensing
signal [DIFFSENSE] provided by the SCSI devices on the bus. As soon as you
connect it to the bus, the Expander will autoconfigure its ports as necessary.)
7
CHAPTER 2: Introduction
The Expander supports all current SCSI operations and can handle data rates up
to 20, 40, or 80 megabytes per second, depending on the type of bus it’s
communicating with. Figure 2-1 shows a typical Expander application. If you’d like
to examine a block diagram of the Expander, refer to Appendix B.
Figure 2-1. One SCSI bus with two physical segments: Using an Expander to
access legacy HVD devices with an LVD host adapter.
HVD Segment
HVD Devices LVD Devices Ultra2 SCSI LVD
Host Adapter
Ultra2 SCSI
LVD/HVD
Multimode
Expander
LVD Segment
8
ULTRA2 SCSI LVD/HVD MULTIMODE EXPANDER
2.2 Features
• Supports legacy and Ultra2 SCSI devices on the same bus with LVD-to-HVD or
SE-to-HVD conversion:
– Fully backward-compatible with SCSI-1, SCSI-2 [Fast SCSI], and SCSI-3
[Ultra SCSI], and can be used with either Narrow or Wide buses.
– Has switchable internal termination.
• Transfers data at up to 80 Megabytes per second (on a 16-bit Wide bus) in
either direction.
• Supports as many as 16 SCSI devices.
• Does not require software or a SCSI ID.
• Has RS-485 HVD transceivers.
• Can be used to extend your HVD bus as far as 37 m (121.3 ft.).
• Transparent operation—requires no software and no SCSI ID.
• Supports arbitration, parity, disconnect/reconnect, and sync or async data
transfer.
• Can act as either a target or initiator on either connected SCSI-bus segment.
• LEDs show power status and bus activity at all times.
• Can optionally provide TERMPWR (terminator power) to either or both
attached bus segments. Handles TERMPWR with a resetting circuit protector
and backflow-preventing diodes.
2.3 The Complete Package
Besides the Ultra2 SCSI LVD/HVD Multimode Expander itself, you should have
received its power cord and this manual. If anything is missing or arrived damaged,
call Black Box right away.
9
CHAPTER 3: Configuration and Internal LEDs
3. Configuration and Internal LEDs
3.1 Opening the Expander
To configure the Ultra2 SCSI LVD/HVD Multimode Expander’s termination,
you’ll need to access the Expander’s internal jumpers.
CAUTION!
To avoid receiving a potentially hazardous electric shock, make sure the
Expander is turned OFF and unplugged both when you open it and for
the entire period of time it stays open.
Conversely, even while the Expander is OFF, you need to avoid
damaging its circuit board with static electricity. If possible, stand on an
anti-static mat when you open the Extender and wear anti-static gloves
or wrist straps. At the very least, ground yourself before you open the
Expander by touching something metal.
Take these steps to open the Expander:
1. Use a small Phillips-head screwdriver to unscrew the screws embedded in each
of the Expander’s four rubber feet. Remove the feet.
2. You’ll see the edges of the Expander‘s wraparound housing on the bottom of
the unit right next to the holes where the feet used to be. If necessary, gently
pry one of these edges slightly outward so that the housing doesn’t fit so
snugly.
3. Carefully slide the housing toward the back of the unit and remove it.
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