Description
LinkHubs™ are advanced, intelligent, multiport
serial port (LinkHubS32K) or ethernet (linkHubE32K) interfaces for use
with Dallas Semiconductor 1-Wire™ and iButton™ components. It uses
superior digital and analog methods to accomplish more reliable operation
on a wide variety of network topologies. It also offers many functions
that simplify network communications and some diagnostic tools as well.
There are five (5) 1-wire busses (1 internal and 4 external) which are
logically or’ed into a single composite 1-wire bus. Software written for
the Dallas Semiconductor DS9097U interface will work even though the
1-wire devices are physically on separate busses. Each external bus can be
up to 1000 feet long. This yields a logical 1-wire network of 4000 feet
with 4 times the network weight of a standard 1-wire bus.
An extended command set allows the four
1-Wire®
ports can be used independently or together. In addition, if one of the
1-Wire®
shorts out the remaining channels continue to function normally. When the
problem is corrected the channel will reappear and operate normally.
The LinkHub is a powered device, providing +12V and +5V power on the same
cable as the 1-wire bus. In addition, local EEPROM storage is provided for
user configuration data. A suitable power supply may be found here.
The LinkHub has been designed to operate reliably on long and short 1-Wire
busses. This is accomplished by a special analog interface design that
uses matched impedances and slew rate controls, as well as smart cable
pre-charge. In addition, the firmware (programming) is adaptive and makes
adjustments for a variety of network parameters automatically.
The LinkHub is based on the Link, designed in cooperation with Dallas
Semiconductor Corp., Dallas, Texas, who is the manufacturer of the 1-Wire
and iButton devices and various accessories.
LinkHubs ship WITHOUT power supply.
You will need a power supply that can supply 12VDC to a 2.5mm coaxial
connector, negative to the center post such as indicated above..
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