| 555-1005 | 370-1153 | 370-1230 |
| w Bracket
w/o Bezel 77777107 |
w/o Bracket
w/o Bezel 77777107 3 1/4" Height |
w/o Bracket
w Bezel 77777126 3 1/4" Height |


In the External Storage Module, orient the Address Select Switch Cable as shown, and plug it into J4.

| PIN | SETTING | DESCRIPTION |
| 1-2 | In | AC + DC ground connected to signal ground |
| 3-4 | In | AC + DC ground connected to chassis ground |
| PIN | SETTING | DESCRIPTION |
| P | In | Parity enabled |
| PIN | SETTING | DESCRIPTION |
| 3-4 | In | Terminator power from DC connector |
| PIN | SETTING | DESCRIPTION |
| 1-2 | Out | AC + DC ground not connected to signal ground |
| 3-4 | Out | AC + DC ground not connected to chassis ground |
| PIN | SETTING | DESCRIPTION |
| P | Out | Parity enabled |
| PIN | SETTING | DESCRIPTION |
| 3-4 | In | Terminator power from DC connector |
| PIN | SETTING | DESCRIPTION | TARGET |
| 1, 2, 4 | Out | Drive select | Target 0 |
| 1 | In | Drive select | Target 1 |
| 2 | In | Drive select | Target 2 |
| 1, 2 | In | Drive select | Target 3 |