M268 S Series Jumper Setting
Obsolete product information
M2681S, M2682S, M2683S
PCA Layout
All configurations marked * are default settings.
1. Terminal CNH1
| Pins | Status | Function |
|---|---|---|
| 1-2 | OPEN | SCSI ID bit value 1 |
| 3-4 | OPEN * | SCSI ID bit value 2 |
| 5-6 | OPEN * | SCSI ID bit value 4 |
| 7-8 | OPEN | UNIT ATTENTION disabled |
| SHORT * | UNIT ATTENTION enabled | |
| 9-10 | OPEN | SCSI bus parity disabled |
| SHORT * | SCSI bus parity enabled | |
| 9-10 | SHORT | CSEL connected to the interface |
| SHORT * | SCSI level - SCSI-2 | |
| 13-14 | OPEN | Spin up via command |
| SHORT * | Spin up on power up | |
| 15-16 | SHORT * | Reserved |
Notes
1-6 : Always ensure that each device on the SCSI bus has been
assigned a unique ID.
7-8 : Disable this function when attaching the drive to any Apple Macintosh computer.
9-10 : Some older Macintoshes require this option disabled.
11-12 : Remove this jumper when attaching the drive to older
model host adapters.
13-14 : Remove this jumper only if the host adapter supports
START/STOP UNIT command.
2. Terminal CNH2
| Pins | Status | Function |
|---|---|---|
| 1-2 | OPEN | Supply BUS line terminator power from IDD disabled |
| SHORT * | Supply BUS line terminator power from IDD enabled | |
| 3-4 | OPEN | Supply BUS line terminator power to/from TERMPWR disabled |
| SHORT * | Supply BUS line terminator power to/from TERMPWR enabled | |
| 5-6 | OPEN * | Reserved (Do not change) |
3. Connector CN5
External LED connection.
Note:
Cable length should not exceed 30 centimeters.
| Pin | Signal |
|---|---|
| 01 | LED(V) |
| 02 | LED |
4. Connector CN4
| Pin | Function |
|---|---|
| 01 | GROUND ON |
| 02 | SPSYNC IN |
| 03 | GROUND OUT |
| 04 | SPSYNC OUT |
