Acrosser AES-HM76Z1FL - Manual (Page 36)

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5.2.2 F81216 Second Super IO Configuration
Option Choice Description
COM 1 ~ Com 2
Configuration
NA
Set Parameters of COM1 ~ COM2
COM 3 ~ Com 4
Configuration
NA Set Parameters of COM3 ~ COM4
COM3 422/485
function
RS-422 / RS-485 Enable COM_3 422 function or only 485 function
COM4 422/485
function
RS-422 / RS-485 Enable COM_4 422 function or only 485 function