The digital input and output DB25 connectors on all Focusrite Pro products are wired to the AES59 (Tascam) standard:
| Pin | Signal |
| 1 | Out channels 7/8 + |
| 14 | Out channels 7/8 - |
| 2 | Ground |
| 15 | Out channels 5/6 + |
| 3 | Out channels 5/6 - |
| 16 | Ground |
| 4 | Out channels 3/4 + |
| 17 | Out channels 3/4 - |
| 5 | Ground |
| 18 | Out channels 1/2 + |
| 6 | Out channels 1/2 - |
| 19 | Ground |
| 7 | In channels 7/8 + |
| 20 | In channels 7/8 - |
| 8 | Ground |
| 21 | In channels 5/6 + |
| 9 | In channels 5/6 - |
| 22 | Ground |
| 10 | In channels 3/4 + |
| 23 | In channels 3/4 - |
| 11 | Ground |
| 24 | In channels 1/2 + |
| 12 | In channels 1/2 - |
| 25 | Ground |
| 13 | Not used |