VersaTRAK RTU User M anual
Page 3 of 31
Last Revised: 05/23/02
SIXNET
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Box 767
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Clifton Park, NY 12065 USA
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+1 (518) 877-5173
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FAX +1 (518) 877-8346
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Introduction
VersaTRAK and Mini-VersaTRAK are open systems Remote Terminal Units that provide
direct field wiring connections to a wide variety of industry devices. These RTUs and
Windows software form a high performance, flexible I/O system.
A typical VersaTRAK or Mini-VersaTRAK station consists of a DC power supply, an RTU
and optional expansion I/O modules. SIXTRAK Expansion I/O modules connect to the
RTU through a daisy-chained "ST-Bus" cable. RemoteTRAK and EtherTRAK I/O modules
connect to the RTU through RS485 and Ethernet, respectively. SIXTRAK modules are
shown in the diagram below.
Typical VersaTRAK and MINI-VersaTRAK Components
Expansion
I/O Modules
Eight additional discrete I/O points can be added to any VersaTRAK or Mini-VersaTRAK
RTU by using the VT-PB8 expansion board. This board accepts single point plug-in
modules in any combination. The VT-PB8 connects to the RTU through a supplied 20
conductor ribbon cable.
All VersaTRAK and Mini-VersaTRAK RTUs have a ST-Bus port that can control up to 20
SIXTRAK I/O modules directly. Up to 128 modules can be connected to the ST-Bus port
by using a SIXTRAK I/O expander (part number ST-EX-001-20U) after each 20 modules.
All SIXTRAK I/O modules are supported by VersaTRAK and Mini-VersaTRAK RTUs.
RemoteTRAK I/O modules can be connected directly to the RS485 port of a VersaTRAK or
Mini-VersaTRAK. If an RS485 port is not available, then an RS232 port and an RS232 to
RS485 converter (SIXNET part number RM-232-485-4U) can be used. All RemoteTRAK
I/O modules are supported by VersaTRAK and Mini-VersaTRAK RTUs.
EtherTRAK I/O modules can be connected through hubs and other off-the-shelf Ethernet
media to the Ethenet port of a VersaTRAK. All EtherTRAK I/O modules are supported by
VersaTRAK RTUs.
