VersaTRAK RTU User M anual
Page 19 of 31
Last Revised: 05/23/02
SIXNET
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Communication
ports
All VersaTRAK and Mini-VersaTRAK RTUs have two communication ports; a Plant Floor
port and a Main port. Optionally, a VersaTRAK RTU can have two additional RS232 ports
or an Ethernet port. The Mini-VersaTRAK model VT-M2-224-xxP has an additional RS485
port. All VersaTRAK / Mini-VersaTRAK communication ports support
SIXNET
Universal
protocol (default) and Modbus ASCII / RTU protocols. The baud rate and other
communication parameters for all ports are assigned in the SIXNET I/O Tool Kit. (Refer to
the SIXNET I/O Tool Kit online help for information on setting communication parameters.)
Plant Floor Port
(All Models)
The Plant Floor RS232 port provides a connection to any RS232 device, typically a
computer. Plant Floor serial port wiring is shown on page 20.
Main Port
(All Models)
The Main port is an RS232 or RS422/RS485 port, depending on the VersaTRAK or Mini-
VersaTRAK model. The main port may be connected to any RS232 or RS422/RS485
device, or in some cases, may be connected to other RTUs in a passthru configuration. (See
below.) Wiring examples for each type of main port are shown on upcoming pages.
RS485 Port
(VT-M2-224-xxP)
This RS485 port can be used for two-wire communication to RS485 devices such as
RemoteTRAK I/O modules. SIXNET and Modbus protocols are supported.
VersaTRAK Optional
Communication
Ports
The two optional RS232 User serial ports can be used for communication to RS232 devices.
The optional Ethernet port is accessible through the supplied 10BaseT or AUI connectors,
but not both. The VersaTRAK RTU will automatically monitor both connectors for network
traffic. Once activity is located on a connector, the VersaTRAK RTU will only monitor that
connector for messages until power is cycled.
All standard Ethernet devices and communications media are supported.
VersaTRAK / Mini-VersaTRAK Communication Ports
