Figure 6. Configuration Jumpers, Back View - Seagate ST3285N Product Manual

24 ST3655 Family SCSI Drives Product Manual, Rev. A
J9. Active/passive
termination jumper block
5 3 1
Circuit board
6 4 2
+2.85V to 110 ohms
Power and ground to
220/330 ohms
J6. Terminator power
source jumper block
3 1
4 2
From SCSI connector
From power connector
To SCSI connector only
From power connector
and to SCSI bus
Terminating resistors
not installed

Figure 6. Configuration jumpers, back view

Terminating
resistor
packs
(pin 1)
jumper block
Ground
MSB
Signal
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
Circuit
board
SCSI ID = 6
SCSI ID = 7
J3. DC power connector
Circuit board
+5V
+5V return
+12V return
+12V
J4. I/O connector
(pin 1)
J5. SCSI ID
2 4 6
Circuit
LSB
board
1 3 5