Black Box IC540A Manuale utente
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Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
AUGUST 2000
IC540A
Ultra 2 SCSI LVD Expander
Ultra2 SCSI LVD
Multimode Extender
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 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 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
3.3 Observing the Internal LEDs ........................................................... 14
4. Installation ................................................................................................ 15
4.1 Connecting the SCSI-Bus Cables ..................................................... 15
4.2 Connecting AC Power and Observing the External LEDs ............. 16
5. Applications .............................................................................................. 17
5.1 Applications That Will Work ............................................................ 17
5.2 Applications That Won’t Work ........................................................ 19
6. Troubleshooting ...................................................................................... 20
6.1 Calling Black Box .............................................................................. 20
6.2 Shipping and Packaging ................................................................... 20
Appendix A: Port Pinouts ............................................................................... 21
A.1 Low-Voltage Differential (LVD) Pinout ........................................... 21
A.2 Single-Ended (SE) Pinout ................................................................. 23
Appendix B: Block Diagram .......................................................................... 25
5
CHAPTER 1: Specifications
1. Specifications
Compliance — FCC Part 15 Subpart J Class B, IC Class/classe B
Interface — Wide (16-bit) Ultra2 SCSI (“Fast 40”), multimode (can
be either LVD or single-ended, autosensing)
Protocol — Transparent to synchronous or asynchronous
communication
Data Rate — Up to 80 Megabytes per second
Maximum
Distance — Extends LVD SCSI bus as far as 25 m (82 ft.) with a single
unit, farther with daisychained units
User Controls — (4) Internal jumpers for termination; additional internal
jumpers are reserved
Indicators — LEDs:
(2) Front-mounted: Power and Busy;
(5) Internal: (4) Bus Type, (1) Busy;
An additional internal LED is reserved
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 EXPANDER
2. Introduction
2.1 Overview
The Ultra2 SCSI LVD Expander is a Low Voltage Differential (LVD) 16-bit Wide
SCSI-bus extender. The Expander effectively divides the SCSI bus into two LVD or
SE (single-ended) segments—one segment connected to each of its two ports. 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 single-
ended segments, while retaining optimal performance and maximum cable length
of LVD. The Expander can also be used with an Ultra SCSI (“SCSI-3,” 40-MB-per-
second) host adapter to add Ultra2 devices to its bus and increase cable lengths.
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 ports are “multimode,” meaning they can operate in 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.) Because of this,
you can use the Expander to effectively double the length of a single-ended SCSI
bus, or to access LVD peripherals farther away from your host adapter than the
normal maximum of 12 m (40 ft.). You can also connect two Expanders point-to-
point across as much as 24 m (80 ft.) of cable, as long as there aren’t any other
SCSI devices in-line between them.
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 single-ended devices with an LVD host adapter.
Single-Ended Segment
Single-Ended Devices LVD Devices Ultra2 SCSI LVD
Host Adapter
Ultra2 SCSI
LVD Expander
LVD Segment
8
ULTRA2 SCSI LVD EXPANDER
2.2 Features
• Supports legacy and Ultra2 SCSI devices on the same bus with LVD-to-LVD
extension or SE-to-LVD 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.
• Can be used to extend your LVD bus as far as 25 m (82 ft.), or to create an
LVD link that extends your single-ended bus.
• Can be daisychained to achieve even higher distances.
• 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, regardless of whether they’re LVD or SE. Handles
TERMPWR with a resetting circuit protector and backflow-preventing diodes.
2.3 The Complete Package
Besides the Ultra2 SCSI LVD 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 Expander’s termination, or to get visual
confirmation of more information than the external LED can provide, you’ll need
to access the Expander’s internal jumpers and LEDs.
CAUTION!
To avoid receiving a potentially hazardous electric shock, make sure the
Expander is turned OFF and unplugged when you open it. You might
have to temporarily turn the unit ON after it has been opened in order to
observe its internal LEDs—be very careful if you do this!—but never
open the unit while the unit is ON.
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.
Indice
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