The LinkHub-S is based on the Link and designed in cooperation with Dallas Semiconductor Corp, who is the manufacturer of the 1-Wire® and iButton® devices and various accessories.
LinkHubs are advanced, intelligent, multiport serial port (LinkHubS32K) or Ethernet (LinkHubE32K) interfaces to be used with Dallas Semiconductor 1-Wire® and iButton® components, as well as AEM systems. It uses superior digital and analog methods to perform more reliable operations on a wide variety of network topologies. It also offers functions that can simplify network communications and offers some diagnostic tools.
The LinkHub-S is designed to operate reliably on long and short 1-Wire® busses. This is done by a special analog interface design that uses matched impedances and slew rate controls, as well as smart cable pre-charge. In addition, the programming (firmware) is adaptive and automatically makes adjustments for a variety of network parameters.
There are five 1-Wire® busses, one internal and four external, which are logically or’ed into a single 1-Wire® bus. The 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 ft long with one sensor attached. This creates a 1-Wire network of 4000 ft with four times the network weight of a standard 1-Wire® bus.
An extended command set allows the four 1-Wire® ports to be used independently or together. If one of the 1-Wires® shorts out, the remaining channels with continue to function normally. Then, when the problem is fixed, the channel will reappear and operate normally.
The LinkHub-S is a powered device, providing +12V and +5 power on the same cable as the 1-Wire® bus. However, the LinkHub-S ships WITHOUT a power supply. Local EEPROM storage is provided for user configuration data and the LinkHub-S is available as three models, each with a different amount of EEPROM memory: 32KB, 256KB, and 512KB.
For more information on this product, please refer to the Link Family Manual.
External Power (HubPwr) technical information: Power Supplies