Seagate ST43400N/ND user manual Unshielded single-ended I/O cabling Signal Name Pin Number

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Installation	15

Table 5. Unshielded single-ended I/O cabling
Signal Name	Pin Number
DB- (0)	2
DB- (1)	4
DB- (2)	6
DB- (3)	8
DB- (4)	10
DB- (5)	12
DB- (6)	14
DB- (7)	16
DB- (P)	18
GROUND	20
GROUND	22
GROUND	24
TERMPWR	26
GROUND	28
GROUND	30
ATN-	32
GROUND	34
BSY-	36
ACK-	38
RST-	40
MSG-	42
SEL-	44
C/D-	46
REQ-	48
I/O-	50
Notes:

1.All odd pins except 25 must be connected to ground. Pin 25 is open.

2.A minus sign indicates active low.

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Contents Elite Disc Drive ST43400N/ND Contents Preface Electrostatic discharge protectionImportant safety information and precautions ST43400N/ND User’s Manual Technical support services SeaFAX 408SeaFONE 408 SeaBOARDGeneral description ST43400N/ND disc driveSize Dimensions Characteristics Conditions Specifications Page Drive functional block diagram Environmental requirements InstallationSite requirements Airflow requirements Suggested airflow Space requirements Mounting orientationsDimensions of the drive and power supply Power requirements Grounding requirements Interface requirementsScsi Unshielded single-ended I/O cabling Signal Name Pin Number Unshielded differential I/O cabling Signal Name Pin Number Unpacking, inspection, and repacking UnpackingInspection RepackingInstallation procedures Setting the control board jumpersJ4A Installing the power supply Power supply installation Installing an optional bezel Attaching a bezel Mounting the drive Mounting the drive Connecting the system I/O cabling O cable attachmentTerminator attachment-single-ended I/O Grounding the system Terminator attachment-differential I/OSystem diagram for spindle sync Synchronizing the spindleJ4A Installation Verification Switches and indicators OperationSwitches and indicators Switch or Indicator Function Operating instructions Parts data Options and accessories Part Number Description Maintenance Observing maintenance precautionsArranging for depot repair Removing and replacing a driveRemoving and replacing a power supply Packing a drive for shipmentPage Maintenance Publication Number 83327630, Rev. a