NISKECOM3 with universal I/O bracket is specifically designed with NISE/NIFE models for serial port expansions. Based on four independent UART channel, NISKECOM3 can support four independent RS232/RS422/RS485 auto ports via cables with DB26 connector type, with 2.5KV Galvanic Isolation protection. NISKECOM3 only supports Tx/Rx/CTS/RTS signals.