ProSoft Technology PLX31-EIP-SIE - Manual (Page 48)

Hardware Information PLX3x Series
User Manual Ethernet and Serial Gateways
Page 48 of 218 ProSoft Technology, Inc.
September 17, 2014
4.2 Serial Port Cables (for Gateways with Serial Ports)
This section contains information on the cable and pin 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.
Example: 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 DB9Male
adapter cable is provided for each serial port. The DB9Male adapter cable
provides connections for RS-232, wired as Data Terminal Equipment (DTE), RS-
422 and RS-485.
4.2.1 RS-232 - Null Modem (DTE with Hardware Handshaking)
This type of connection is used when the device connected to the gateway
requires hardware handshaking (control and monitoring of modem signal lines).
To enable hardware handshaking, set the port configuration to use RTS/CTS
handshaking. (For MBS protocol, set the Use CTS Line parameter to Yes. For
ASCII protocol, set the Handshaking parameter to Yes.)