Eaton PXG 900, User Manual

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PXG 900 User's Guide - Firmware Version 4.3 - 1/9/2017
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Configuring Device Communications
You can configure the PXG's Modbus serial ports, Modbus TPC/IP port, and INCOM port on the Network tab.
Choose edit to change any of the port configurations. You can access the port settings by choosing the appropriate
gear icon. Before connecting the PXG to either a twisted pair Modbus or a twisted pair INCOM cable, make sure that
you observe the proper polarity when wiring the cable to one of the three-pin Phoenix connectors provided. The
PXG RS-485 ports are clearly marked for the A+, B- and CMN (common) connections.The PXG900 modeling tool
can provide estimated communication performance estimates for the individual communication ports. The ports
have the following device limits:
INCOM port – 100 devices
COM1 port – 32 devices, supports Modbus RTU devices
COM2 port – 32 devices, supports Modbus RTU devices
Network 2 - 50 devices, supports Modbus TCP devices when Private Network is enabled
Modbus Serial Ports
You can set Modbus Ports 1 and 2 individually through their respective gear icons. Set the serial port parameters for
your Modbus RTU network. You should only change the timeout settings if absolutely necessary.
To attach a Modbus RTU network to the PXG:
Note: If needed, add an external 120-ohm resistor.
Attach one of the three-pin Phoenix connectors shipped with the PXG to the Modbus twisted pair cable.
Connect the Modbus cable to the COM1 or COM2 port of the PXG.
INCOM Port
Choose the gear icon to access the INCOM port serial settings. For more information on wiring an INCOM network,
see the
. (TD 17513) Eaton Electrical Field Devices Communication Wiring Specification
A 100-Ohm terminating resistor isn't required at the PXG.
To attach a network of INCOM devices to the PXG:
Attach one of the three-pin Phoenix connectors shipped with the PXG to the INCOM twisted pair cable.
Insert the connector into the INCOM port on the PXG.
Network 2 (Ethernet)
When Private Network is enabled, you can use Network 2 to connect to a network of devices using Modbus TCP.
Choose the gear icon to access the network settings. The IP address should match that of the Modbus TCP subnet.
Don't change the timeout setting unless this is absolutely necessary.
Adding Devices
After you've properly configured the serial ports and connected the gateway to your serial networks, you can begin
adding any supported devices currently on that serial network. Adding devices, like port configuration, is done on the
Network tab.