
PLX30 Series
Hardware Information
Ethernet and Serial Gateways
User Manual
ProSoft Technology, Inc.
Page 47 of 200
September 19, 2012
4.1.1 Serial Port Specifications
Type
Specifications
Serial Port Isolation
2500 Vrms port signal isolation per UL 1577
serial port communication signal uses RF(Radio
Frequency) modulation signal as isolation media, IC
chip model is SiliconLabs
Si844x(Si8440,Si8441,Si8442).
Serial Port Protection
RS-485/422 port interface lines TVS diode protected
at +/- 27V standoff voltage.
RS-232 port interface lines fault protected to +/- 36V
power on, +/- 40V power off.