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ACB-4525S4000, ACB-4525Z

ADAPTEC, INC.

ACB-4525S4000, ACB-4525Z

Data bus:

None (SCSI to ESDI interface)

Size:

Drive card

Hard drives supported:

SCSI to two RLL ESDI drives

Floppy drives supported:

None

A diagram for these Models was not available, the ACB-4000A is pictured above.

CONNECTIONS

Function

Location

20-pin data cable connector-drive 0

CN0

20-pin data cable connector-drive 1

CN1

34-pin control cable connector-hard drive(s)

CN2

4-pin connector-DC power

CN3

50-pin SCSI connector-to host adapter

CN4

SCSI ADDRESS

SCSI ID

JP5/Jumper 1

JP5/Jumper 2

JP5/Jumper 3

 

0

open

open

open

 

1

closed

open

open

 

2

open

closed

open

 

3

closed

closed

open

 

4

open

open

closed

 

5

closed

open

closed

 

6

open

closed

closed

7

closed

closed

closed

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Not used

JP2

N/A

Provides a protocol compatible with ACB-5500 and ACB-4000 families of controllers (4525S4000 only)

JP5/jumper 4

closed

 

Does not allow for compatibility with ACB-5500

and ACB-4000 controllers (4525S4000 only)

JP5/jumper 4

open

Zero latency default enabled (4525Z only)

JP5/jumper 4

closed

 

Zero latency default disabled (4525Z only)

JP5/jumper 4

open

Spindle motor starts on command

JP5/jumper 5

closed

 

Spindle motor starts on power-up

JP5/jumper 5

open

SCSI unit attention disabled

JP5/jumper 6

closed

 

SCSI unit attention enabled

JP5/jumper 6

open

SCSI parity check enabled

JP5/jumper 7

closed

 

SCSI parity check disabled

JP5/jumper 7

open

Normal operation

JP5/jumper 8

open

 

Self-diagnostic enabled

JP5/jumper 8

closed

MISCELLANEOUS TECHNICAL NOTES

The function of JP1 is to determine the select technique used to interface the host adapter.

Soldering Pin-2 to Pin "P" allows for the "pulse" select that is used by controllers designed to work with SCSI hosts. Soldering Pin-2 to Pin "H" or "L" allows for the "handshake" or "level" select signal used in accordance with SCSI standards.

Unit attention (JP5/6) is not supported if the JP5/4 jumper is installed on the ACB-4525S4000.