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Black Box SC122A Manual

Black Box SC122A Manual

4 x 2 scsi matrix switch
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© 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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  • Page 1 © Copyright 2000. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...
  • Page 2 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 4 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 5 4 X 2 SCSI MATRIX SWITCH 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 6 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 7 4 X 2 SCSI MATRIX SWITCH TRADEMARKS USED IN THIS MANUAL ® is a registered trademark of Underwriters Laboratories Incorporated. Windows ® and Windows NT ® are registered trademarks of Microsoft Corporation. Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

  • Page 8: Table Of Contents

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

  • Page 9: Chapter Page

    4 X 2 SCSI MATRIX SWITCH Chapter Page 5.7 RS-232 Serial Port Commands....... . . 25 5.8 ASCII Character Reference for SCSI Switch Box Selection .

  • Page 10: Specifications

    CHAPTER 1: Specifications 1. Specifications SCSI Interface Maximum Port Switching—Delay 3 ns Maximum Signal Skew—2 ns Internal Terminator Power—1 amp SCSI-1, SCSI-2, & SCSI-3, SPI-2 compatible; Asynchronous and synchronous compatible; Conforms to ANSI X3.131 and X3T9.2 Single-Ended SCSI (SE) Maximum Data Rate (8-bit Narrow)—20 MBps Maximum Data Rate (16-bit Wide)—40 MBps Maximum Port Cable Length—6 meters (19.7 ft.) Internal Terminator Impedance—100 ohms...
  • Page 11 4 X 2 SCSI MATRIX SWITCH Low-Voltage SCSI (LVD) Maximum Data Rate (8-bit Narrow)—40 MBps Maximum Data Rate (16-bit Wide)—80 MBps Maximum Port Cable Length—25 meters (82 ft.) Internal Terminator Impedance—105 ohms Terminator Disconnect Capacitance—3 pF Active Internal Bus Termination Serial Interface Baud Rate—9600 or 19,200 baud Mode—No parity, 8 bits, 1 stop bit...
  • Page 12 CHAPTER 1: Specifications Size—4.5"H x 11.3"W x 9.7"D (11.4 x 28.7 x 24.6 cm ) Weight—5.1 lb. (2.3 kg)

  • Page 13: Introduction

    4 X 2 SCSI MATRIX SWITCH 2. Introduction 2.1 About the SCSI Switch The 4 x 2 SCSI Matrix Switch is a high-performance electronic crosspoint switch for use with the SCSI (Small Computer System Interface) bus. It enables four independent SCSI buses to be selected and electrically connected in any combination via internal electronic switching circuits.

  • Page 14: Lcd Panel

    VAILABLE WITCH NTERFACES The 4 x 2 SCSI Matrix Switch is available in the following configurations: • Single-ended/LVD interface (SC122A) • Differential interface (SC123A) NOTE Make sure that the SCSI Switch you’re installing is used with the appropriate interface. Single-ended/LVD and differential SCSI devices cannot be installed on the same switch unless a SCSI differential converter is used.

  • Page 15: General Hardware Description

    4 X 2 SCSI MATRIX SWITCH 2.3.2 G ENERAL ARDWARE ESCRIPTION The 4 x 2 SCSI Matrix Switch’s rear panel identifies each of the independent SCSI ports. SCSI ports A and B have two daisy-chained connectors per port, and SCSI ports 1, 2, 3, and 4 have single connectors for installation of SCSI devices.
  • Page 16 CHAPTER 2: Installation SCSI Switch Ports Term Term Term Term Term Term Term Term Term Term Term Term Figure 2-1. SCSI Matrix Switch block diagram. Term Tape Term Computer Disk Disk Term CD-Rom Disk Term Term Computer Term Scanner Term Scanner Figure 2-2.
  • Page 17 4 X 2 SCSI MATRIX SWITCH NOTE 1. Connections can be made to either connector on the appropriate port. 2. “Term” indicates where terminators should be installed. The LCD panel is used to select port connections and enable or disable each internal SCSI port terminator.

  • Page 18: Installation

    • (2) SCSI Matrix Switch control software disks • Rackmount handles and screws • Bottom feet If anything is missing or damaged, call Black Box at 724-746-5500. 3.2 AC Line Voltage You can connect the Switch to any AC input voltage between 105 to 240 volts.

  • Page 19: Scsi Interface Cabling

    4 X 2 SCSI MATRIX SWITCH 3.5 SCSI Interface Cabling Both versions of the 4 x 2 SCSI Matrix Switch have 68-pin shielded high-density SCSI-2 connectors. Single-ended devices can have cable lengths up to 19 ft. (6 m). Differential devices can be connected with up to 82 feet (25 meters) of cable. Low- voltage differential devices can support up to 82 feet (25 meters) of cable.

  • Page 20: Operator Controls And Indicators

    CHAPTER 4: Operator Controls and Indicators 4. Operator Controls and Indicators 4.1 AC Power Switch The AC power switch is located on the Switch’s rear panel. Putting the switch in the “1” position applies power to the SCSI Switch. NOTE Always apply AC power to the SCSI Switch before powering SCSI devices and computers.

  • Page 21: Keypad

    4 X 2 SCSI MATRIX SWITCH 4.2.2 K EYPAD The Keypad enables the selection of menu and set-up parameters for the SCSI Switch. • MENU: Returns to the SCSI Switch set-up and configuration menu. • ENTER: Selects the highlighted set-up parameter. •...
  • Page 22 CHAPTER 4: Operator Controls and Indicators DISPLAY PORTS DISPLAY PORTS | A 1 | A 2 | A 3 | A 4 | | B 1 | B 2 | B 3 | B 4 | SET SERIAL PORTS SET SERIAL PORTS COM 1 9600 * 19200...

  • Page 23: Scsi Switch Port Configuration

    FRONT PANEL UNLOCKED ENTER PASSWORD TO LOCK 0 0 0 0 DISPLAY VERSION BLACK BOX SC123A S/N 2 1 0 0 3 0 3 H V D V E R 2 1 1 2 1 2 4 L A N HVD/ LVD/SE: Indicates current SCSI bus interface mode.

  • Page 24: Scsi Switch Default Configuration

    CHAPTER 4: Operator Controls and Indicators 4.5 SCSI Switch Default Configuration The SCSI Switch default configuration as shipped from the factory is defined below. PORTS: A1, B2 TERMINATION: All Off SERIAL PORTS: 9600 Baud, Daisychained SWITCH NUMBER: 01 TEMPERATURE ALARM: 40° Celsius FRONT PANEL: Unlocked, Password 0000...

  • Page 25: Configuration And Operation

    The maximum cable distance for SE should not exceed 6 meters (19.7 feet) total length. Black Box offers standard and custom SCSI cables for connecting the SCSI Switch to host devices and peripherals. Call Black Box Technical Support for details.

  • Page 26: Selecting Internal Terminator Power

    CHAPTER 5: Configuration and Operation 5.3 Selecting Internal Terminator Power On-board SCSI Switch terminators can be powered by internal 5-volt power or externally from SCSI bus “termination power.” Internal 5V E1-E8 External Termination Power Figure 5-1. Internal terminator power jumpers. Table 5-1.

  • Page 27: Serial Port Interface Pinout

    4 X 2 SCSI MATRIX SWITCH Table 5-2. Jumper settings for external termination E19-Port A E20-Port 1 E24-Port 3 E21-Port B E22-Port 2 E26-Port 4 NOTE The standard factory default connects internal terminators to internal 5 volts. 5.5 Serial Port Interface Pinout The SCSI Switch contains two RS-232 serial ports, using DB9 female connectors;...

  • Page 28: Rs-232 Serial Port Commands

    CHAPTER 5: Configuration and Operation Figure 5-3. RS-232 Port 1. NOTE To bypass RTS and CTS control signals, jumper E12-1 and E13-1. (This may be required in some DOS applications.) RS-232 P Jumper block E14, E15, E16, E17, and E18 configure the Port 2 serial interface for daisychained or dual serial ports.
  • Page 29 4 X 2 SCSI MATRIX SWITCH a. Baud rate internally selected for 9600 or 19200 baud. (Factory default is 9600 baud.) b. Transmit and receive set for 8 data bits, 1 stop bit, no parity. c. Serial interface operates in half-duplex mode. d.
  • Page 30 CHAPTER 5: Configuration and Operation Ascii “N” - Turns specified port ON. Ascii “F” - Turns specified ports OFF. e. End sequence: Ascii “cr” Table 5-4. SCSI Switch commands Command Command Example Response Character Select Port <cr>//|A1K<cr> Report Port Status <cr>//|S<cr>...
  • Page 31 4 X 2 SCSI MATRIX SWITCH Table 5-4 (continued). SCSI Switch commands Command Command Example Response Character Disable Audible Alarm <cr>//|OA<x><cr> Set Baud Rate <cr>//|OB<xy><cr> Set Serial Port Mode <cr>//|OC<x><cr> Set Switch Number <cr>//|OD<xx><cr> Set Lock/Unlock <cr>//|OP<xxxx><cr> Password Set Temperature Limit <cr>//|OT<xx><cr>...
  • Page 32 <cr>//|<AB1234k><cr> report: none d. Report SCSI Terminator Status command: <cr>//|s<cr> report: //|AB1234k<cr> e. Report Model, Serial Number, and Date of Manufacture: command: <cr>//|?<cr> report: //SC121A 20241150 01/15/2000 SC122A = model number 20241150 = serial number 01/15/2000 = date of manufacture...
  • Page 33 4 X 2 SCSI MATRIX SWITCH f. Report Alarm Status: command: <cr>//|a<cr> report: //|axyz<cr> (xx- 8-bit hexadecimal value) x: 1 = Over temperature y: 1 = Power supply 2 failure z = Power supply 1 failure g. Report SCSI Bus Performance: command: <cr>//|P<xy><cr>...
  • Page 34 CHAPTER 5: Configuration and Operation k. Set Serial Port Baud Rate: command: <cr>//|OB<xy><cr> x: 0= COM1 x: 1=COM2 y: 0=9600 Baud y: 1=19200 Baud report: none l. Set Serial Port Mode: command: <cr>//|OC<x><cr> x: 0= daisy chain serial ports x: 1= dual comm serial ports report: none m.

  • Page 35: Ascii Character Reference For Scsi Switch Box Selection

    95, 98, and Windows NT ® operating systems to allow remote control of the switch. Follow instructions on the disks to install the software. Black Box Control Software Version 3.1 File Settings Configure SC122/123A Window Help 4 x 2 SCSI Matrix Switch...

  • Page 36: Connecting Multiple Scsi Switches

    CHAPTER 5: Configuration and Operation 5.10 Connecting Multiple SCSI Switches Up to 32 SCSI Switches can be controlled by a single RS-232 serial interface. To operate in this configuration, set the serial ports to operate in daisy-chained mode. Computer SCSI Switch SCSI Switch SCSI Switch SCSI Switch...

  • Page 37: Scsi Switch Typical Applications

    4 X 2 SCSI MATRIX SWITCH 4. Mounting the SCSI Switch in a rack should not cause a hazardous condition of uneven mechanical loading. 5. Do not overload the SCSI Switch supply circuit. 6. Make sure the rackmount equipment is connected to earth ground. 5.12 SCSI Switch Typical Applications The following illustrations provide sample application and configuration information.

  • Page 38: Network Control Of Scsi Switch (Optional)

    MAC address can be found on a label located on the bottom of the Switch. You can search for the IP address by clicking the search button in the “Configure Black Box Network Switch.” This will bring up a “Search For Black Box Network Switches”...
  • Page 39 4 X 2 SCSI MATRIX SWITCH Command strings to control the SCSI Switch may be manually entered through certain versions of HyperTerminal to support connections to IP addresses via LAN. NOTE You will need to specify port #3001 when establishing the connection. LAN ENABLED (DEFAULT) RS-232 ENABLED Figure 5-9.
  • Page 40 CHAPTER 5: Configuration and Operation Figure 5-10. J14: LAN ribbon cable location. Configure Network Switch New IP Address Initialize IP Address Switch MAC Address 00 – 80 – A3 – – – Change IP Address Search Current IP Address Configure Exit Search for Network Switches Starting IP Address...

  • Page 41: Setswitchterm, Utility

    4 X 2 SCSI MATRIX SWITCH 5.13.3 S ETSWITCH TILITY The setswitch.exe utility enables you to set switch parameters via the LAN port. This utility is located on the diskette provided with your SCSI Switch. To change switch settings and termination for an SCSI Switch: from a DOS prompt run SETSWITCH.EXE from the diskette provided.
  • Page 42 CHAPTER 5: Configuration and Operation [/r]<command> = <command> is sent to the switch with no parsing. Any response from the switch is displayed on the console’s error output.

  • Page 43: Scsi Technical Information

    4 X 2 SCSI MATRIX SWITCH 6. SCSI Technical Information 6.1 SCSI Basics 6.1.1 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 44: Common Problems

    CHAPTER 6: SCSI Technical Information 6.1.5 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 45: Scsi Interface Signal Descriptions

    4 X 2 SCSI MATRIX SWITCH • 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 46 CHAPTER 6: SCSI Technical Information • DB(0 through 15,P,P1) (DATA BUS): Eight data-bit signals, plus a parity-bit 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).
  • Page 47 4 X 2 SCSI MATRIX SWITCH Table 6-1 (continued). SCSI connector assignments single-ended (SE) 16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number Ground Ground Ground Ground TERMPWR TERMPWR TERMPWR TERMPWR Reserved Reserved Ground Ground Ground -ATN Ground Ground Ground -BSY...
  • Page 48 CHAPTER 6: SCSI Technical Information Table 6-1 (continued). SCSI connector assignments single-ended (SE) 16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number Ground -DB9 Ground -DB10 Ground -DB11 Table 6-2. SCSI connector assignments differential/16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number...
  • Page 49 4 X 2 SCSI MATRIX SWITCH Table 6-2 (continued). SCSI connector assignments diff./16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number +DB(5) -DB(5) +DB(6) -DB(6) +DB(7) -DB(7) +DB(P) -DB(P) DIFFSENS Ground TERMPWR TERMPWR TERMPWR TERMPWR Reserved Reserved +ATN -ATN Ground Ground...
  • Page 50 CHAPTER 6: SCSI Technical Information Table 6-2 (continued). SCSI connector assignments differential/16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number +I/O -I/O Ground Ground +DB(8) -DB(8) +DB(9) -DB(9) +DB(10) -DB(10) +DB(11) -DB(11) Table 6-3. SCSI connector assignments low-voltage differential (LVD)/16-bit SCSI (wide) Signal Name Pin Number Signal Name...
  • Page 51 4 X 2 SCSI MATRIX SWITCH Table 6-3 (continued). SCSI connector assignments low-voltage differential (LVD)/16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number +DB(4) -DB(4) +DB(5) -DB(5) +DB(6) -DB(6) +DB(7) -DB(7) +DB(P) -DB(P) Ground Ground DIFFSENS Ground TERMPWR TERMPWR TERMPWR TERMPWR...
  • Page 52 CHAPTER 6: SCSI Technical Information Table 6-3 (continued). SCSI connector assignments low-voltage differential (LVD)/16-bit SCSI (wide) Signal Name Pin Number Signal Name Pin Number +SEL -SEL +C/D -C/D +REQ -REQ +I/O -I/O +DB(8) -DB(8) +DB(9) -DB(9) +DB(10) -DB(10) +DB(11) -DB(11)
  • Page 53 4 X 2 SCSI MATRIX SWITCH Table 6-4. SCSI speed support map STA Term Maximum Bus Length (M) Maximum Devices SCSI-1 Fast SCSI Fast Wide SCSI Ultra SCSI Ultra SCSI Wide Ultra SCSI Wide Ultra SCSI Wide Ultra SCSI Ultra2 SCSI Ultra2 SCSI Wide Ultra2 SCSI Wide Ultra2 SCSI...
  • Page 54 CHAPTER 6: SCSI Technical Information Figure 6-1. SCSI Switch component placement. • RS-232 jumper block: E9 through E18 • Active terminator power select: E1 through E8, E29, E30...

  • Page 55: Troubleshooting

    • Package it carefully. We recommend that you use the original container. • If you are shipping the 4 x 2 SCSI Matrix Switch for repair, make sure you include everything that came in the original package. Before you ship, contact Black Box to get a Return Materials Authorization (RMA) number.

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