Yes, the following information outlines the protection on the Prolinx
RS485/422 port interface lines TVS diode protected at +/- 26.7V breakdown voltage and +/- 24V stand-off voltage.
RS232 port interface lines fault protected to +/- 36V power on, +/- 40V power off.
2500V RMS port signal isolation per UL 1577.
3000V DC min. port to ground and port to logic power isolation.