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
ports can be used independently or together. In addition, if one of the
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..