The ADM483 has a Standard RS-485 A, B input common mode voltage range of -7V to +12 V.
The absolute maximum (DC) rating on the A,B pins is –9 V to +14 V.
Adding 24 V DC to the ADM483 A,B bus pins would not be possible.
HBM (Human Body Model) air of ESD rating has been defined as ± 15V in Table 8.
Please tell me the ESD rating of the Machine Model.