Res 2004-035 - Laserfiche WebLink

Home Browse Search

r~tundant Hyper Server Modules (HSM), which includes a CPU, two on-board voice ~ dems, and a 10/100base-TX Ethernet network interface. In 'addition to the HSM, the I S shall contain a network interface hub., fiber optic conver~ers, power supply unit, backup battery, and surge suppressers. The unit will be wall mounted in an air- conditioned facility at the Waste Water Treatment Plant. The HSS, pictured below, is capable of simultaneously polling multiple DFS Radio RTUs, DFS Network RTUs, and ASCII or Ethernet MODBUS devices. All remote interfaces will be Fiber Optic isolated to protect the unit from transient voltage damage. The HSS provides dial-out capability for alarms, as well as dial-in access via remote computer and touch tone phone. The HSS is compatible with any operating system that can connect to the HSS via an ODBC driver. A version of Windows that can run the Internet browser Microsoft Intemet Explorer 5.5 or later will be installed on all workstations that will be using the HyperTAC II Human Machine Interface (HMI) to connect to the HSS. The HSS will be fully redundant through the inclusion of a second Modular Backplane that contains an HSM, network switch, power supply, battery, surge arrestor, Transient Filter Shield (TFS), fuses, and associated wiring. Redundant operation allows the two HSMs to operate as one. One HSM shall act as primary and run HyperTAC II and the MySQL database server. The other HSM will run in secondary mode and monitor the primary. If the secondary HSM loses contact with the primary, the secondary shall reboot the primary and begin to run the HyperTAC II and MySQL servers. The roles of primary and secondary will not be dependent upon the HSM's configured IP address or the backplane in which the HSM is installed. 'Either can operate as the primary or secondary server. The HSS will connect to the Primary Workstation via a network connection. This connection is compatible with an existing utility Ethernet network. BLOC Design-Build .will provide a direct network connection between the HSS and the Primary Workstation vhen both are located inside the same building. This configuration allows the Primary ¥orkstation to continue communicating with the HSS should the local area network (LAN) go down. The user will be able to sign onto the system from any HyperTAC II