AUGUST 2002 SC120A-R2 SC121A 2 x 2 SCSI Matrix Switch CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.
FCC/IC RFI STATEMENTS, EU DECLARATION OF CONFORMITY 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.
2 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. 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.
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.
2 X 2 SCSI MATRIX SWITCH TRADEMARKS USED IN THIS MANUAL BLACK BOX and the Corporation. logo are registered trademarks of Black Box Microsoft, Windows, and Windows NT are registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. UL is a registered trademark of Underwriters Laboratories Incorporated. Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
TABLE OF CONTENTS Contents Chapter Page 1. Specifications ..........................................................................................................7 2. Introduction ..........................................................................................................10 2.1 About the SCSI Switch ..................................................................................10 2.2 Features ..............................................................................................
2 X 2 SCSI MATRIX SWITCH Chapter Page 5. Configuration and Operation (continued) 5.8 Graphical User Interface (GUI) ................................................................33 5.9 Connecting Multiple SCSI Switches ..........................................................34 5.10 Typical Application......................................................................................34 5.11 Network Control of SCSI Switch ................................................................35 5.11.
CHAPTER 1: Specifications 1. Specifications SCSI Interface Maximum Port Switching Delay: 3 ns Maximum Signal Skew: 2 ns Internal Terminator Power: 1 amp Rear-Panel Connectors: 68-pin high-density SCSI-1, SCSI-2, and SCSI-3 (also Ultra160 SCSI [“Ultra3 SCSI”] for SC120A-R2), SPI-2 compatible; asynchronous and synchronous compatible; conforms to ANSI X3.131 and X3T9.
2 X 2 SCSI MATRIX SWITCH Low-Voltage Differential (LVD) SCSI (SC120A-R2 Only) Maximum Data Rate (8-bit Narrow): 40 MBps for Ultra2 SCSI (narrow transfers aren’t officially supported in the Ultra160 SCSI standard) Maximum Data Rate (16-bit Wide): 160 MBps Maximum Port Cable Length: 25 meters (82 ft.
CHAPTER 1: Specifications Physical Temperature: 32 F to 149°F (0 to 65°C) Humidity: Up to 90% relative humidity, noncondensing Power: 95 to 260 VAC ± 10% (25 watts) 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.
2 X 2 SCSI MATRIX SWITCH 2. Introduction 2.1 About the SCSI Switch The 2 x 2 SCSI Matrix Switch is a high-performance electronic crosspoint switch for use with the SCSI (Small Computer System Interface) bus. This product enables two independent SCSI buses to be selected and electrically connected in any combination via internal electronic switching circuits.
CHAPTER 2: Introduction 2.2.1 LCD PANEL The 2 x 2 SCSI Matrix Switch features an easy-to-use, menu-driven LCD panel with soft-touch MENU, ENTER, and directional keys. The LCD is lighted, which allows for easy viewing and operation. 2.2.2 FRONT-PANEL CONTROLS • Set and configure SCSI ports. • Set termination. • Set switch number. • View power-supply status. • View internal temperature. • Set internal-temperature alarm. • Set serial-port configuration. • Display SCSI-bus busy status.
2 X 2 SCSI MATRIX SWITCH 2.3.2 GENERAL HARDWARE DESCRIPTION The 2 x 2 SCSI Matrix Switch’s rear panel identifies each of the independent SCSI ports. SCSI ports A and B have two daisychained connectors per port and SCSI ports 1 and 2 have single connectors for installation of SCSI devices. You can install the SCSI Switch at any point on the SCSI bus. Each port has internal termination that can be turned on or off from the LCD panel.
CHAPTER 2: Introduction SCSI Switch Ports Figure 2-1. SC121A block diagram. Figure 2-2. SC120A-R2 block diagram.
2 X 2 SCSI MATRIX SWITCH SCSI Switch (SC120A-R2) Figure 2-3. Typical switch installation.
CHAPTER 3: Installation 3. Installation 3.1 What’s Included • (1) 2 x 2 SCSI Matrix Switch • (1) AC power cord • (1) 10-ft. (3-m) DB9-male-to-DB9-female RS-232 cable • (1) DB9-male-to-DB25-female RS-232 adapter • (1) SCSI Matrix Switch control software CD-ROM • This users’ manual If anything is missing or damaged, call Black Box at 724-746-5500. 3.2 AC Line Voltage You can connect the SCSI Switch to any AC input voltage between 95 and 260 volts.
2 X 2 SCSI MATRIX SWITCH 3.5 SCSI Interface Cabling Both versions of the 2 x 2 SCSI Matrix Switch have 68-pin high-density connectors. Single-ended devices can have cable lengths up to 20 ft. (6 m). Differential or lowvoltage differential (LVD) devices can be connected with up to 82 ft. (25 m) of cable. Connect the host adapter or peripheral to the rear-panel connector using a proper SCSI cable. Section 6.1 describes standard SCSI-interface requirements.
CHAPTER 4: Operator Controls and Indicators 4. Operator Controls and Indicators 4.1 AC Power Switch The AC power switch is located on the SCSI Switch’s rear panel. Move it to the “|” position to turn on the switch. NOTE Always turn on the SCSI Switch before powering SCSI devices and computers. This will ensure that devices are found when the system boots up. 4.2 LCD Display, Keypad, and Indicators 4.2.1 LCD DISPLAY The LCD display shows the selection parameters available.
2 X 2 SCSI MATRIX SWITCH 4.2.2 KEYPAD Use the keypad to select menu and setup parameters for the SCSI Switch. • MENU: Returns to the SCSI Switch setup and configuration menu. • ENTER: Selects the highlighted setup parameter. • UP, DOWN, RIGHT, LEFT Arrows: Scrolls the cursor to enable menu selection. 4.2.3 INDICATORS The indicators provide SCSI Switch status information. • POWER: Indicates that the SCSI Switch is powered. • BUSY: Indicates that there is SCSI activity on one or more SCSI ports.
CHAPTER 4: Operator Controls and Indicators DISPLAY PORTS DISPLAY PORTS | A 1 | A 2 | | B 1 | B 2 | SET SERIAL PORTS SET SERIAL PORTS COM 1 COM 2 DAISYCHAIN 9600 * 9600 * Y* 19200 19200 N SET SWITCH NUMBER SET SWITCH NUMBER 01 USE UP/DOWN KEYS DISPLAY POWER, TEMPERATURE DISPLAY POWER, TEMP PWR SUPPLY GOOD +25.
2 X 2 SCSI MATRIX SWITCH SET TEMP LIMIT SET TEMP LIMIT MAX +40°C CURRENT TEMP +26.0°C DISPLAY BUS ACTIVITY DISPLAY ACTIVITY A B 1 2 FRONT PANEL LOCK FRONT PANEL UNLOCKED ENTER PASSWORD TO LOCK 0 0 0 0 DISPLAY VERSION BLACK BOX SC121A S/N 2 1 0 0 3 0 3 HVD VER 2112124 x LAN In the DISPLAY VERSION panel: • “HVD,” “LVD,” or “SE” at bottom left indicates the current SCSI-bus interface mode. • “x” at top right indicates that the serial ports are locked.
CHAPTER 4: Operator Controls and Indicators 4.4 SCSI Switch Port Configuration The SCSI Switch has an internal memory device that retains the current configuration and setup information. Switch port, termination, serial port, and control parameters are saved as they are entered on the front panel. 4.5 SCSI Switch Default Configuration The SCSI Switch default configuration as shipped from the factory is defined below.
2 X 2 SCSI MATRIX SWITCH 5. Configuration and Operation 5.1 SCSI Cable Interface Requirements The 2 x 2 SCSI Matrix Switch can be installed at any point on the SCSI bus. Always use high-quality cables for optimum computer performance and reliability. The SC121A differential switch contains 68-pin high-density connectors for up to 80-MB-per-second wide Ultra SCSI and Ultra2 SCSI computers and peripherals. The maximum cable distance should not exceed 82 ft. (25 m).
CHAPTER 5: Configuration and Operation SC120A-R2 TERMINATION CONFIGURATION Internal termination on Logic Component is always on by default and is not settable at the point of the logic components (see Figure 5-1). To ensure proper termination when configuring the switch termination, always have the termination enabled at the specified alphanumeric port and the termination disabled at the specified numeric port.
2 X 2 SCSI MATRIX SWITCH Figure 5-2. SC120A-R2 termination example 1. Figure 5-3. SC120A-R2 termination example 2.
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 “terminator power” (TERMPWR). 1 Internal 5V 2 External Terminator Power E13, E14, E19, E20 or E15, E16, E21, E22 3 Figure 5-4. Internal terminator-power jumpers. Table 5-1. Jumper settings for internal termination.
2 X 2 SCSI MATRIX SWITCH Table 5-2. Jumper settings for external termination. SC120A-R2 E6-Port A E5-Port B SC121A E22-Port 1 E21-Port 2 E19-Port A E20-Port B E17-Port 1 E18-Port 2 NOTE The standard factory default connects internal terminators to internal 5 volts. 5.5 Serial-Port Pinout The SCSI Switch contains two RS-232 serial ports, using DB9 female connectors; these allow external control of the switch. The connectors are compatible with standard RS-232 modem cables.
CHAPTER 5: Configuration and Operation 5.6 LAN/Serial-Port Commands You can use simple ASCII-character commands to control the SCSI Switch through either its LAN port (by opening a socket connection to port 3001) or one of its RS-232 serial ports. For serial control, set your computer’s serial port this way: a. Baud rate: 9600 (the switch’s factory default) or 19,200 bps. b. Data format: 8 data bits, 1 stop bit, no parity. c. Transmission mode: Half-duplex.
2 X 2 SCSI MATRIX SWITCH Table 5-4. SCSI Switch commands. 28 Command Cmd. Char.
CHAPTER 5: Configuration and Operation Table 5-4 (continued). SCSI Switch commands. Command Cmd. Chars. Example Command String Example Result or Response Enable/Disable Alarm OA //|OA0 Alarm enabled Set Baud Rate OB //|OB10 COM2 = 9600 bps Set Serial Port Mode OC //|OC0 Daisychain enabled Set Switch Number OD //|OD06 Switch # = 6 Set Lock/Unlock Password OP //|OP3156 Password = 3156 Set Temperature Limit OT //|OT45 Max. temp.
2 X 2 SCSI MATRIX SWITCH EXPANDED LIST OF COMMANDS a. Select SCSI Port Matrix: example command: //|A1B2K report: none NOTE K - Connects specified ports, but also breaks former connections and maintains proper termination as per SCSI rules. N - Connects specified ports without regard for former connections or termination. F - Disconnects the specified ports. b. Report SCSI Port Matrix Assignment Status example command: //|S example report: //|A1B2K c.
CHAPTER 5: Configuration and Operation i. Report Temperature: example command: //|t example report: //|t+19.5 +19.5 = +19.5˚C, +67˚F j. Report SCSI-Bus Performance: example command: //|P report format: //|P For ports A, B, 1, and 2 respectively, aa, bb, 11, and 22 = ASCII representations of 8-bit hexadecimal values from 00 to FF, where 00 represents 0% busy (completely idle) and FF represents 100% busy k.
2 X 2 SCSI MATRIX SWITCH p. Set Switch (Device) Number: example command: //|ODxx xx = ASCII representation of decimal value from 01 through 32 report: none q. Set “Lock/Unlock Front Panel” Password: example command: //|OPxxxx xxxx: ASCII 4-digit decimal number from 0000 to 9999 report: none r. Set Temperature Limit: example command: //|OT xx: ASCII 2-digit decimal number from 15 to 55 (degrees C) report: none s.
CHAPTER 5: Configuration and Operation 5.7 ASCII Character Reference for SCSI Switch Box Selection Switch # ASCII 1 | 2 } 3 ~ 4 5 ` 6 a 7 b 8 c Switch # ASCII 9 d 10 e 11 f 12 g 13 h 14 i 15 j 16 k Switch # ASCII 17 l 18 m 19 n 20 o 21 p 22 q 23 r 24 s Switch # ASCII 25 t 26 u 27 v 28 w 29 x 30 y 31 z 32 { 5.
2 X 2 SCSI MATRIX SWITCH 5.9 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 daisychained mode. In Figure 5-7, “1” is RS-232 port 1 on each switch and “2” is RS-232 port 2. Computer RS-232 1 1 2 2 SCSI Switch Box 2 SCSI Switch Box 1 1 1 2 SCSI Switch Box 3 SCSI Switch Box 4 Figure 5-7. Multiple SCSI Switch configuration. 5.
CHAPTER 5: Configuration and Operation 5.11 Network Control of SCSI Switch The 2 x 2 SCSI Matrix Switch may be controlled over a TCP/IP network through its LAN port. 5.11.1 LAN-PORT CONFIGURATION You can remotely control the SCSI Switch through a standard 10-Mbps Ethernet connection running TCP/IP. In the SCSI Switch’s factory-default setting, the LAN port will be enabled and the RS-232 COM2 port (which shares the same circuitry and is most often used for daisychaining SCSI Switches) will be disabled.
2 X 2 SCSI MATRIX SWITCH 5.11.2 APCONCFG UTILITY The apconcfg.exe utility is used to configure the TCP/IP address. This utility is provided on the included CD-ROM. You can reconfigure the IP address by using the IP Configuration Utility. Run apconcfg.exe from the CD-ROM provided with your 2 x 2 SCSI Matrix Switch. A “Configure Network Switch” window will appear. Enter the new IP address and switch MAC address in the appropriate fields.
CHAPTER 5: Configuration and Operation 5.11.3 APCONCMD UTILITY The apconcmd.exe utility enables the user to set switch parameters through the LAN port. This utility is located on the CD-ROM provided with your SCSI Switch. To change switch settings and termination for an SCSI Switch, run (at a DOS prompt) APCONCMD.EXE from the CD-ROM.
2 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. 6.1.
CHAPTER 6: SCSI Technical Information 6.1.5 COMMON PROBLEMS 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. 6.1.
2 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. • Always turn off the power to your computer and SCSI devices before swapping cables or moving devices around. SCSI cables contain sensitive data transmission lines and one or more live power wires. • Turn on your SCSI devices before you turn on the computer.
CHAPTER 6: SCSI Technical Information • DB0 through DB15, P, P1 (DATA BUS): Sixteen data-bit signals and two paritybit signals that together form a data bus. DB15 is the most significant bit and has the highest priority during the Arbitration phase. Bit number, significance, and priority decrease downward to DB0. A data bit is defined as a one when the signal value is true and as a zero when the signal value is false. Data parity DBP and DBP1 shall be odd. Table 6-1.
2 X 2 SCSI MATRIX SWITCH Table 6-1 (continued). SCSI connector assignments for single-ended (SE) 16-bit SCSI (wide).
CHAPTER 6: SCSI Technical Information Table 6-1 (continued). SCSI connector assignments for single-ended (SE) 16-bit SCSI (wide). Signal Name Pin Number Signal Name Pin Number Ground 32 -DB9 66 Ground 33 -DB10 67 Ground 34 -DB11 68 Table 6-2. SCSI connector assignments for differential 16-bit SCSI (wide).
2 X 2 SCSI MATRIX SWITCH Table 6-2 (continued). SCSI connector assignments for differential 16-bit SCSI (wide).
CHAPTER 6: SCSI Technical Information Table 6-2 (continued). SCSI connector assignments for differential 16-bit SCSI (wide). Signal Name Pin Number Signal Name Pin Number +I/O 29 -I/O 63 Ground 30 Ground 64 +DB(8) 31 -DB(8) 65 +DB(9) 32 -DB(9) 66 +DB(10) 33 -DB(10) 67 +DB(11) 34 -DB(11) 68 Table 6-3. SCSI connector assignments for low-voltage differential (LVD) 16-bit SCSI (wide).
2 X 2 SCSI MATRIX SWITCH Table 6-3 (continued). SCSI connector assignments for low-voltage differential (LVD) 16-bit SCSI (wide).
CHAPTER 6: SCSI Technical Information Table 6-3 (continued). SCSI connector assignments for low-voltage differential (LVD) 16-bit SCSI (wide).
2 X 2 SCSI MATRIX SWITCH Table 6-4. SCSI distance/device support. STA Term 48 Maximum Bus Length (M) SE HVD LVD Maximum Devices SCSI-1 6 25 — 8 Fast SCSI 6 25 — 8 Fast Wide SCSI 6 25 — 16 Ultra SCSI 1.5 25 — 8 Ultra SCSI 3 — — 4 Wide Ultra SCSI — 25 — 16 Wide Ultra SCSI 1.
CHAPTER 6: SCSI Technical Information To access jumper options: Remove the four screws on the bottom of the unit. Then lift off the cover. Figure 6-1. SCSI Switch component placement. • Internal termination jumper block: E13, E14, E19, E20 on SC120A-R2 or E15, E16, E21, E22 on SC121A (see Section 5.3).
2 X 2 SCSI MATRIX SWITCH 7. Troubleshooting 7.1 Calling Black Box If you determine that your 2 x 2 SCSI Matrix Switch is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box at 724-746-5500. Before you do, make a record of the history of the problem.
LEGAL INFORMATION DISCLAIMERS AND NOTICES The manufacturer specifically disclaims the implied warranties for this product of merchantability and fitness for a particular purpose. Some states and provinces do not allow limitations on how long an implied warranty lasts, so the above limitation or exclusion might not apply to you.
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