Short description...

Schema, production files in the format needed for Seeed Studio.
Usage...
| 1 | GNDA | Ground. |
| 2 | GNDA | Ground. |
| 3 | +5VA | +5V power supply. |
| 4 | +3.3VA | +3.3V power supply. |
| 5 | RXDA | RXD. |
| 6 | TXDA | TXD. |
| 7 | CTSA | CTS. |
| 8 | RTSA | RTS. |
| 9 | NC | Not Connected. |
| 10 | RS485 | RS485. |
| 1 | GNDB | Ground. |
| 2 | B | B. |
| 3 | A | A. |
| Ref. | Count | Description |
|---|---|---|
| C1,C2,C3 | 3 | 100n, 0805 |
| D1,D2,D3 | 3 | PSD12C |
| J1,J2,J3 | 3 | JUMPER |
| P1 | 1 | TTL |
| P2 | 1 | RS485 |
| R1 | 1 | 560 |
| R2 | 1 | 120 |
| R3 | 1 | 560 |
| U1 | 1 | SI8442 wide body |
| U2 | 1 | F0505S-1W |
| U3 | 1 | MAX485 |