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For Electrical Interface, click here.

Configuration and Jumper Options

Connector J2 Detail

SCSI ID Selection

Jumpers at ID0, ID1, and ID2 select the SCSI address. Each SCSI device on one Host Adapter must have a unique address. ID selection is binary, as shown here.

 
	SCSI ID		ID2	ID1	ID0

	0		out	out	out
	1		out	out	in
	2		out	in	out
	3		out	in	in
	4		in	out	out
	5		in	out	in
	6		in	in	out
	7 (Default)	in	in	in

Interface Termination

RN 6 provides termination for the SCSI interface lines. (Active termination is recommended when multiple drives are used.) Default is RN6 installed. SCSI terminators are installed only in the end devices on the SCSI cable; remove them from each of the other devices.

Terminator Power

W1 and W2 select the source of power (+5V) for terminators RN1 and RN2; W12 controls the drive supplying +5V to the bus.

   W1   W2   W12

   Y    N    -    Drive provides terminator power. (Default)
   N    Y    -    Host provides terminator pwr via J1 pin 26 to RN6.

   -    -    Y    Drive supplies +5V to the bus via J1 pin 26. (Default)

Spindle Control

Jumpers at J2 pins 7 and 8 controls the spindle option.

   No Jumper    The drive starts the spindle motor at power-on. (Default)
   Jumper       The drive waits for a Start Unit SCSI command to
                       start the motor.

Write Protect

A jumper at J2 pins 11 and 12 selects the write protect option.

    Jumper	The drive is write protected.
    No Jumper	The drive is not write protected. (Default)

Bus Parity Check

A jumper at J2 pins 13 and 14 selects the bus parity check option. The drive always generates parity regardless of this option.

    Jumper	SCSI interface parity checking disabled.
    No Jumper	SCSI interface parity checking on. (Default)

Spindle Sync Termination

Jumpers at W8 and W9 control spindle sync termination. This depends on system configuration; i.e. Master Mode or Master Controller Mode.

    W8    W9
    Yes   Yes    Slave and Master Sync are terminated.
    No    No     Spindle sync not terminated. (Default)

Frame Ground Option

A jumper at W11 selects the frame ground option.

    Jumper	Frame ground connected to logic ground.
    No Jumper	Frame ground not connected to logic ground. (Default)