Payload Interface
The E2 is designed for custom, field swappable payloads. Below are specifications to be used for creating a custom payload.
Electrical and Power Interface
The primary interface to the payload is a 9 pin connector from the aircraft. The payload side requires a 9 position D-Sub Plug with Male pins. BST strongly recommend the following connector from Digikey:
The pinouts for the payload connector are listed in the table below (figure below from the solder cup side of the connector):
| Pin | Function | Notes |
|---|---|---|
| 1 | V+ (Raw Battery, 19.2V - 25.2V) | 3A Max |
| 2 | GND | 3A Max |
| 3 | UART Tx | Tx from Aircraft |
| 4 | UART Rx | Rx to Aircraft |
| 5 | CAN HI | |
| 6 | CAN LO | |
| 7 | CAN GND | 500mA Max |
| 8 | CAN PWR | 500mA Max |
| 9 | UART GND |
Danger
Never use a null modem cable with the E2, it can severely damage the avionics or payload.