Seagate ST43400N/ND user manual Grounding the system, Terminator attachment-differential I/O

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Figure 13 shows how the terminator resistor-paks are attached on drives with differential I/O. These terminator resistor-paks, which are dual inline packages, mount in sockets in the control board. These terminators are also marked with a dot above pin 1.

If the drive is located at either end of the daisychain, ensure that it has resistor-pak(s) installed. Section 4 lists resistor-pak part numbers. Refer to information earlier in this section regarding the terminator power source jumper.

Grounding the system

Grounding the system through the power cables and I/O cables is usually sufficient to protect against noise and emissions.

Terminator

Resistor-Pak

(note orientation)

Terminator

Resistor-Paks

(dual inline

packages)

Terminator

Socket

Pin 1

Terminator Power

Source Jumper

Figure 13. Terminator attachment—differential I/O

Image 33
Contents Elite Disc Drive ST43400N/ND Contents Electrostatic discharge protection PrefaceImportant safety information and precautions ST43400N/ND User’s Manual SeaFAX 408 Technical support servicesSeaFONE 408 SeaBOARDST43400N/ND disc drive General descriptionSize Dimensions Characteristics Conditions Specifications Page Drive functional block diagram Installation Site requirementsEnvironmental requirements Airflow requirements Suggested airflow Mounting orientations Space requirementsDimensions of the drive and power supply Power requirements Interface requirements Grounding requirementsScsi Unshielded single-ended I/O cabling Signal Name Pin Number Unshielded differential I/O cabling Signal Name Pin Number Unpacking Unpacking, inspection, and repackingInspection RepackingSetting the control board jumpers Installation proceduresJ4A Installing the power supply Power supply installation Installing an optional bezel Attaching a bezel Mounting the drive Mounting the drive O cable attachment Connecting the system I/O cablingTerminator attachment-single-ended I/O Terminator attachment-differential I/O Grounding the systemSynchronizing the spindle System diagram for spindle syncJ4A Installation Verification Operation Switches and indicatorsSwitches and indicators Switch or Indicator Function Operating instructions Parts data Options and accessories Part Number Description Observing maintenance precautions MaintenanceRemoving and replacing a drive Arranging for depot repairPacking a drive for shipment Removing and replacing a power supplyPage Maintenance Publication Number 83327630, Rev. a