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SCSI Fiber Optic Extender

The SCSI Fiber Optic Extender requires no software configuration and

only nearby access to an AC electrical outlet for proper operation. That

makes installation fast and easy.
Install the Extender in any position and any location near the host

computer or peripherals that’s most convenient for you. Make sure that the

ventilation slots on the side of the unit are unobstructed and receive

adequate air flow.

Do not 

place the Extender on any device that generates

heat.

N O T E

Switch off power to all computers and peripherals attached to the SCSI bus

before installing the SCSI Fiber Optic Extender.

3.1 Setting the AC Line Voltage Switch

The SCSI Fiber Optic Extender can be powered from either a 110- or

220-VAC power source. Figure 3-1 shows the location of the external

voltage-selection switch on back of the unit. The default setting is 110-VAC.

CAUTION

Before installing this unit, verify that the voltage-selection switch is
switched to the appropriate setting to match your AC input source.

Figure 3-1. Rear-Panel View.

POWER

O

I

AC INPUT

RCV

XMT

220

110

3. Installation

AC Voltage-Selection Switch

Содержание ACI-2000A

Страница 1: ...t Call 412 746 5500 or Fax 1 800 321 0746 To order Call 412 746 5500 8 00 A M to 8 00 P M EST Mail order Black Box Corporation P O Box 12800 Pittsburgh PA 15241 Bl ack Box Corporati on The Source for...

Страница 2: ...ce in which case the user at his own expense will be required to take whatever measures may be required to correct the interference Changes or modifications not expressly approved by the party respons...

Страница 3: ...ximum SCSI Cable Length 19 7 ft 6 m Maximum Speed 10 megabytes per second Slew Rate 5 ns maximum Protocol Sync or async Standards ANSI X3 131 and X3T9 2 Interface Compatible with SCSI I and SCSI II SC...

Страница 4: ...m SCSI data rate of 10 MBytes per second in asynchronous or synchronous mode It supports the Fast SCSI standard available in top of the line computers and peripherals And proprietary switching enables...

Страница 5: ...e with ST connectors provides the interface between the local and remote Extender units And for greater application flexibility the Extender supports 110 or 220 VAC operation via a user selectable swi...

Страница 6: ...ED provides a visual indication of the SCSI interface BUSY signal It is a general indication that devices are communicating via the SCSI bus LINK ERROR Lights when the integrity of the fiberoptic link...

Страница 7: ...n including The nature and duration of the problem When the problem occurs The components involved in the problem Any particular application that when used appears to create the problem or make it wor...

Страница 8: ...n any device that generates heat NOTE Switch off power to all computers and peripherals attached to the SCSI bus before installing the SCSI Fiber Optic Extender 3 1 Setting the AC Line Voltage Switch...

Страница 9: ...der them separately 3 3 Internal External Terminator Options The SCSI Fiber Optic Extender features internal active SCSI bus termination to improve the cable matching characteristics between multiple...

Страница 10: ...s so make sure that a maximum of two terminators are installed on each side of the Extender link see Figures 2 1 and 2 2 Connect the twisted pair cable from the host or SCSI peripheral to the 50 pin S...

Страница 11: ...to keep the fiberoptic connectors and optical components free of dust and dirt And whenever cables are not atttached to the Extender s ST ports cover them with the protective plastic caps included wit...

Страница 12: ...ber A faint red light will be visible at the tip of one of the connectors This indicates the transmit fiber This is the connector that should be attached to the receive RCV port of the remote Extender...

Страница 13: ...synchronous and synchronous SCSI devices on the bus Overall system performance will depend on the individual data rate and protocol of each SCSI device plus the overhead of the host computer In genera...

Страница 14: ...ing Two SCSI Buses In this configuration the primary SCSI bus is used to connect the local high speed peripherals The secondary SCSI bus is used exclusively as the extended SCSI bus Fiberoptic Cable P...

Страница 15: ...TION and RESELECTION phases MSG MESSAGE A signal driven by a target during the MESSAGE phase REQ REQUEST A signal driven by a target to indicate a request for a REQ ACK data transfer handshake ACK ACK...

Страница 16: ...OUND 13 7 DB 7 16 33 GROUND 15 8 DB P 18 34 GROUND 17 9 GROUND 20 35 GROUND 19 10 GROUND 22 36 GROUND 21 11 GROUND 24 37 GROUND 23 12 TERMPWR 26 38 OPEN 25 13 GROUND 28 39 GROUND 27 14 GROUND 30 40 GR...

Страница 17: ...ack Box Corporati on The Source for Connectivity P O B o x1 2 8 0 0 P i t t s b u r g h P A1 5 2 4 1 4 1 2 7 4 6 5 5 0 0 F a x 4 1 2 7 4 6 0 7 4 6 Copyright 1996 Black Box Corporation All rights reser...

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