Black Box IC490A Manual
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Black Box IC490A Manual

Black Box IC490A Manual

Scsi fiber optic extender
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SCSI Fiber Optic Extender
CUSTOMER
SUPPORT
INFORMATION
F I B E R
S C S I
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: info@blackbox.com
N D E R
E X T E
O P T I C
JULY 2000
R
P O W E
C T I V E
L I N K A
C T I V E
B U S A
R
E R R O
L I N K
IC490A

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  • Page 1 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX SUPPORT FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 FCC INFORMATION FEDERAL COMMUNICATIONS COMMISSION 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...
  • Page 3 SCSI FIBER OPTIC EXTENDER 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.
  • Page 4 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.
  • Page 5 SCSI FIBER OPTIC EXTENDER TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

  • Page 6: Table Of Contents

    CONTENTS Contents Chapter Page 1. Specifications ..........7 2.

  • Page 7: Chapter Page

    SCSI FIBER OPTIC EXTENDER Chapter Page 7.1.3 SCSI-3 ..........20 7.1.4 Signal Wiring .

  • Page 8: Specifications

    CHAPTER 1: Specifications 1. Specifications SCSI Interface Maximum Data Rate—80 MBps Maximum Cable Length—82 ft. (25 m) Internal Termination—Active Slew Rate—3 ns. maximum Connector—68-pin SCSI Fiber Optic Interface Maximum Fiber Cable Length—62.5/125 µm MMF: 700 ft. (213.4 m); 50/125 µm MMF: 1600 ft. (487.7 m) Fiber Optic Serial Data Rate—1.06 GHz Fiber Optic Connector Type—SC Optical Wavelength—850 nm...

  • Page 9: Introduction

    SCSI FIBER OPTIC EXTENDER 2. Introduction 2.1 Description The SCSI Fiber Optic Extender lets you surpass the distance limitation of a Low- Voltage Differential/Single-Ended SCSI (Small Computer System Interface) bus. The SCSI bus is one of the most popular interfaces used to connect additional devices to a computer system.
  • Page 10 CHAPTER 2: Introduction • Supports SCSI 1, 2, and 3 specifications. • Single-Ended/Differential SCSI interface. • Does not require SCSI bus ID. • 1.06 GHz fiber optic serial link. • Standard SC fiber optic connectors. • Compatible with standard fiber optic cables. •...

  • Page 11: What The Package Includes

    SCSI FIBER OPTIC EXTENDER 2.3 What the Package Includes Your package should contain the following items: • (1) SCSI Fiber Optic Extender • (1) AC power cord • This users’ manual If anything is missing or damaged, please call Black Box at 724-746-5500.

  • Page 12: Installation

    100 and 240 volts. In the USA, your Extender will be shipped with a 110-volt power cord. Black Box offers offers a complete source of replacement power cords for most countries. Call Technical Support at 724-746-5500 for details.

  • Page 13: Ensuring Proper Termination

    SCSI FIBER OPTIC EXTENDER 3.5 Ensuring Proper Termination All SCSI buses require proper termination at each end of a SCSI link. Since the SCSI Fiber Optic Extender creates two optically isolated SCSI buses, termination is required on each side of the Extender, in addition to the standard terminators at each end of the SCSI chain.

  • Page 14: Verifying Communications

    CHAPTER 3: Installation Figure 3-2. Connecting two SCSI Fiber Optic Extenders. 3.7 Verify Communications Power on both SCSI Fiber Optic Extenders and verify that the LINK ACTIVE indicators are lit. This will verify that the local and remote Extenders are communicating.

  • Page 15: Operator Controls And Indicators

    SCSI FIBER OPTIC EXTENDER 4. Operator Controls and Indicators 4.1 Power Switch The SCSI Fiber Optic Extender power switch is located on the Extender’s rear panel. Operating the switch in the “1” position applies power to the Extender. 4.2 Indicators Four indicators on the front panel provide status information for the SCSI Fiber Optic Extender.

  • Page 16: Interfacing Requirements

    CHAPTER 5: Interfacing Requirements 5. Interfacing Requirements 5.1 SCSI Cable Interface Requirements The SCSI Fiber Optic Extender can be installed at any point on the SCSI bus. The Extender provides an optically isolated SCSI bus over extended distances. Terminators must be installed on both the local and extended bus. Make sure that a maximum of two terminators are installed on each bus.

  • Page 17: Internal Terminator Power And Fuse

    SCSI FIBER OPTIC EXTENDER 5.3 Internal Terminator Power and Fuse The SCSI Fiber Optic Extender can supply external terminator power via an internal resettable fuse. This fuse supplies 1 amp at 5 volts to the TERMPWR signal. The POWERLINK contains internal protection and will not be affected if other SCSI devices provide terminator power.

  • Page 18: Fiber Optic Cable Requirements

    If you need to order cables that work with your Extender, call Black Box Technical Support at 724-746-5500 for details. Keep fiber optic connectors and Extender optical components free of dust and dirt.

  • Page 19: Operation

    SCSI FIBER OPTIC EXTENDER 6. Operation 6.1 About the Extender The SCSI Fiber Optic Extender converts SCSI data and command information into a high-speed (1.06 GHz) serial data stream which is transmitted over a fiber optic interface to another remote Extender. The remote Extender decodes the data stream and re-converts it to the proper SCSI signals.
  • Page 20 CHAPTER 6: Operation In this configuration, the primary SCSI bus would be connected to the local high- speed peripherals. The secondary SCSI bus would be used exclusively as the extended SCSI bus. Computer Disk Drive SCSI Fiber SCSI Fiber Optic Extender Optic Extender Disk Drives...

  • Page 21: Scsi Technical Information

    SCSI FIBER OPTIC EXTENDER 7. SCSI Technical Information 7.1 SCSI Basics 7.1.1 SCSI-1 The original specification supports data transfers up to 5 MBps on an 8-bit wide parallel data bus. SCSI-1 standards had some incompatibility problems between host adapters and peripheral devices. The need to improve compatibility, increase transfer rates, and add other features for better performance required a review of the specifications.

  • Page 22: Common Problems

    CHAPTER 7: SCSI Technical Information 7.1.5 C OMMON ROBLEMS The majority of problems encountered with SCSI bus installations are due to unbalanced or improper impedances on the SCSI bus transmission cables caused by varying manufacturers’ peripheral devices. SCSI terminators compensate for these inherent impedance mismatches on a SCSI bus where peripheral devices such as hard drives, CD-ROM drives, scanners, or printers are used.

  • Page 23: Scsi Interface Signal Descriptions

    SCSI FIBER OPTIC EXTENDER • If the last device on the chain has two SCSI connectors, attach the cable to one and a terminator to the other. Otherwise, you’ll have an open connector that may cause noise on the SCSI chain. •...
  • Page 24 CHAPTER 7: SCSI Technical Information signal that form a data bus. DB(7) is the most significant bit and has the highest priority during the Arbitration phase. Bit number, significance, and priority decrease downward to DB(0). A data bit is defined as one when the signal value is true and is defined as zero when the signal value is false.
  • Page 25 SCSI FIBER OPTIC EXTENDER Table 7-1 (continued). SCSI connector assignments low-voltage differential (LVD)/16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number Ground Ground DIFFSENS Ground TERMPWR TERMPWR TERMPWR TERMPWR Reserved Reserved Ground Ground +ATN -ATN Ground Ground +BSY -BSY +ACK -ACK...
  • Page 26 CHAPTER 7: SCSI Technical Information Table 7-1 (continued). SCSI connector assignments low-voltage differential (LVD)/16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number +DB(9) -DB(9) +DB(10) -DB(10) +DB(11) -DB(11)
  • Page 27 © Copyright 2000. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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