Seagate ST423451N/W/WD manual Terminating the drive

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Elite 23 Installation Guide, Rev. A

35

N drives

Terminating the drive

ST423451N drives are terminated with permanently mounted IC active terminators. If you install one of these drives and it is not on the end of the SCSI bus, disable the terminators by removing the TE jumper from pins 19 and 20 of connector J4A (see Figure 7). If you install the drive on the end of the SCSI bus, enable ter- mination by installing a jumper on pins 19 and 20 of connector J4A.

J4A

Pin 1

J01

J4B

Pin 1

J4A	Pin 19
J4A
Pin 1

Terminator Enabled (TE)

Terminator Disabled (TE)

Figure 8. Terminating the drive

Image 37

Contents Elite Disc Drive ST423451N/W/WD Contents Electrostatic discharge protection PrefaceImportant safety information and precautions Page Wichtige Sicherheitshinweise Page European Union Compliance Page SeaFONE at 1-800-SEAGATE Seagate Technology Online servicesSeaNET BBS Location Modem number SeaBOARDSeagate Technology Forum on CompuServe SeaFAX Seagate Technology FAX servicesLocation Telephone number Seagate technical support FAXSeaTDD Seagate technical support lineGeneral description Drive characteristics Elite 23 Installation Guide, Rev. a Dimensions of the drive General information Drive modelsScsi ID jumpers Drive termination Circuits and data path widths Terminator powerCable characteristics for single-ended circuits Fifty-pin I/O connection to drive Multiple drive connection to host adapter Multiple-drive connection to host adapter Providing adequate cooling Kühlung des Systems Suggested air flow Abbildung 4. Empfohlener Luftstromverlauf Installation des Laufwerkes und Anschluß der Kabel Mounting the drive and connecting cablesElite 23 Installation Guide, Rev. a Pin Gleichstrom Pin PowerHinweis Page Mounting configuration dimensions Quick reference desktop system notes Formatting the driveSetting the Scsi ID on N models Setting the Scsi ID jumpersTerminating the drive Terminating the driveSetting terminator power jumpers on N models Additional jumper options Other applicable jumper optionsWD drives Terminating the drive ST423451W shown Setting terminator power jumpers on W models Other option jumpers are available as illustrated below LED indicator connections for all drive models Active, Ready, and Fault indicatorsPage Page