Hardware Information PLX3x Series ♦ Multi-Protocol Gateways
User Manual
Page 44 of 215 ProSoft Technology, Inc.
January 25, 2018
4.1.1 Serial Port Specifications
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 Silicon
Labs Si844x (Si8440,Si8441,Si8442).
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.
4.2 Serial Port Cables (for Gateways with Serial Ports)
This section contains information on the cable and pinout assignments for the
PLX3x gateway's serial ports (RS-232/422/485). The PLX3x gateway may come
with one or four serial ports, depending on the configuration purchased.
Note:
The PLX31-EIP-MBS4 gateway contains four serial communication ports.
The PLX31-EIP-MBS gateway contains one serial communication port.
Each physical serial port has a RJ45 jack connector. A six-inch RJ45 to DB9
Male adapter cable is provided for each serial port. The DB9 Male adapter cable
provides connections for RS-232, wired as Data Terminal Equipment (DTE), RS-
422 and RS-485.
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