| Pin | Name | Description |
| 1 | CGND | Chassis ground |
| 2 | CGND | Chassis ground |
| 3 | CGND | Chassis ground |
| 4 | CGND | Chassis ground |
| 5 | -12V | -12 VDC |
| 6 | +5V | +5 VDC |
| 7 | +12V | +12 VDC |
| 8 | +12V | +12 VDC |
| 9 | n/c | Not connected |
| 10 | PWM | Regulates speed of the drive |
| 11 | CA0 | Control line to send commands to the drive |
| 12 | CA1 | Control line to send commands to the drive |
| 13 | CA2 | Control line to send commands to the drive |
| 14 | LSTRB | Control line to send commands to the drive |
| 15 | WrReq- | Turns on the ability to write data to the drive |
| 16 | HdSel | Control line to send commands to the drive |
| 17 | Enbl2- | Enables the Rd line (else Rd is tristated) |
| 18 | Rd | Data actually read from the drive |
| 19 | Wr | Data actually written to the drive |
