| Function name | Function Description | Remark |
| Car display output function | According to the signal sent by the main board, the display signal (P21) is output. | A |
| RSL communication | The I0 signal of the RS32 board communicates with the elevator main control board. | A |
| Input Output | 32 input signals and 32 output signals. | A |
| Server functions | Password verification: View RSL address status: the RSL address corresponding to the IO port can be set through the server; password modification. | A |