Black Box SW178A Bedienungsanleitung

SEPTEMBER 1998

SW178A

SW179A

Compact Bidirectional

Dual Bus Autoswitches

2 to 2

4 to 2

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

Web site: www.blackbox.com • E-mail: [email protected]

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

TRADEMARKS USED IN THIS MANUAL

Centronics is a registered trademark of GENICOM

Corporation.

DeskJet is a registered trademark of Hewlett-Packard.

Zip is a registered trademark of Iomega Corporation.

Windows NT is a trademark, and Windows is a registered

trademark, of Microsoft Corporation.

Any trademarks mentioned in this manual are acknowledged

to be the property of the trademark owners.

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

FEDERAL COMMUNICATIONS COMMISSION

AND

INDUSTRY CANADA

RADIO FREQUENCY INTERFERENCE STATEMENTS

This equipment generates, uses, and can radiate radio frequency energy

and if not installed and used properly, that is, in strict accordance with the

manufacturer’s instructions, may cause interference to radio communication. It

has been tested and found to comply with the limits for a Class A computing

device in accordance with the specifications in Subpart J of Part 15 of FCC rules,

which are designed to provide reasonable protection against such interference

when the equipment is operated in a commercial environment. Operation of

this equipment in a residential area is likely to cause interference, in which case

the user at his own expense will be required to take whatever measures may be

necessary to correct the interference.

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 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 classe A prescrites dans le Règlement sur le

brouillage radioélectrique publié par Industrie Canada.

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

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.

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

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.

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.

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

1. Specifications

SW178A SW179A

Autoswitch Device Output Ports 2 2

Autoswitch Computer Input Ports 2 4

Cable Type Required

Computer to Autoswitch DB25 M/M

Device to Autoswitch DB25 M/Centronics®36 M

Maximum Cable Distance 5 meters

Maximum Transfer Rate 2 megabytes/second

Number of Device LEDs 2

Computer Input Port LEDs 4

Input/Output Port Selection Auto/manual

Timeout Selection 5, 10, 20, or 40 seconds

File Transfer A, B A–B, C–D

Software DOS; Windows 3.1, 95, 98;

Windows NT

Size SW178A: 7"H x 3.7"W x 1.1"W

(17.9 x 9.3 x 2.7 cm);

SW179A: 7.3"H x 3.7"W x 1.1"W

(18.5 x 9.3 x 2.7 cm)

Weight 7 oz. (200 g) 8.5 oz. (240 g)

Operating Temperature 41 to 104°F (5 to 40°C)

Optional Power Adapter 9 VDC, 500 mA

Certification FCC, CE

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

2. Introduction

2.1 Description

The IEEE 1284 standard interface is found on most

printers today. It enables bidirectional communication

between the PC and the printer, allowing the printer to

send information back to the host PC using its built-in

microprocessor.

The Compact Bidirectional Dual Bus Autoswitch

supports full compatibility with IEEE 1284, including

Centronics, nibble, special nibble, byte, Enhanced

Parallel Port (EPP), and Extended Capabilities Port

(ECP). The dual-bus design allows simultaneous access

of both devices to the attached computer. It also

features manual and auto channel-port selection, and

works with DOS, Windows 3.1, Windows 95, Windows 98,

and Windows NT.

The Autoswitch supports IEEE 1284 parallel devices

such as Zip®drives, scanners, CD-ROMs, back-up tapes,

digital CCD cameras, external hard drives, and Ethernet

adapters.

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

2.2 Function Descriptions

2.2.1 A

UTO

-L

INK

ODE

When powering the Autoswitch, you will see the LEDs of

the Computer Input Port circularly scanned from LED A

to D. The Printer Output Port LEDs will remain lit. Your

Autoswitch constantly scans its computer input ports,

looking for a job to send to one of its output ports. You

will see the input ports’ LEDs blink in sequence as the

switch goes through its scan cycle.

Device Out Ports LED Indicator:

PA & PB LED Remain Lit Auto-Link Mode

PA & PB LED are Lit OFF File Transfer Mode

2.2.2 M

ANUAL

ODE

The Switch has two input push buttons labeled Device

and Computer. When you power on the switch, the

switch is in Auto-Link Mode. After you press the

Computer button, it is in manual-setting mode. Press the

Computer button several times and you will see the

LEDs light in order as the active selection moves from

AutoScan to LED A, B, C, and D. Stop pressing the

button when the LED lights for the computer input port

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

you want to set up. You can press the Printer button

several times to cycle through the three level of available

choices (PA, PB, or File Transfer). Finish the cycle to go

back to Auto-Link Mode.

2.2.3 F

ILE

RANSFER

ODE

Use the software selection utility to set up the

Autoswitch to File Transfer Mode. The SW179A dual bus

permits only that the computer attached to Port A can

do file transfer with the computer attached to Port B.

The same goes to Port C and Port D.

2.2.4 S

OFTWARE

ELECTION

See the README file on the driver disk for complete

instruction. This software driver will run an application

in the background and will not do any modification to

your system .INI settings.

2.3 Autoswitch Dual-Bus Design

The Autoswitch has two independent channels for the

switch which provide simultaneous access of either

device by any of the two attached computers. If two PCs

send their jobs simultaneously to two different ports, the

print job will be processed at the same time. But if the

COMPACT BIDIRECTIONAL DUAL BUS AUTOSWITCHES

two PCs send their jobs to the same output port, the

first-come, first-serve rule will follow.

2.3.1 A

XAMPLE OF

IMULTANEOUS

PERATION WITH THE

SW178A

NOTE

PA is the print device on port PA.

PB is the print device on port PB.

Computer A sends a print job to PA and Computer B

sends a print job to PB. Computer A and Computer B

run the File Transfer Program.

2.3.2 A

XAMPLE OF

IMULTANEOUS

PERATION WITH THE

SW179A

Computer A sends a print job to PA and Computer C

sends a print job to PB. Computer A and Computer B

run the File Transfer Program while Computer D sends

a print job to PA.

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