Frequency Converters and Associated Products. Sept 2012.pdf
Frequency Converters and Associated Products. Sept 2012.pdf
Frequency Converters and Associated Products. Sept 2012.pdf
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Outdoor Redundancy Switch Unit 2:1The Picture shows an outdoor switching unit of a 2:1redundant switching system. The switching unit isconnected to the control unit, which is installed indoor.Within the outdoor switch unit alarm <strong>and</strong> statusindication via LEDs, manual switchover <strong>and</strong> easyaccess to the serial control interfaces of the converterunits e.g. is possible. The picture below shows atypical 2:1 configuration with upconverters, built asoutdoor solution.IF TransferRelaysAC InputsRF TransferRelaysIF Input 1RF to HPA 1UpconverterMain 1Term.Term.IF Input 2UpconverterRF to HPA 2Main 2UpconverterSpareOutdoorSwitch BoxMonitor <strong>and</strong> ControlRS 232 or RS 485 orEthernetControl ofRS 485 Alarm InputsSwitchesRedundancy ControllerExternal RS 485 / RS 232EthernetAlarm OutputAC Inputs2:1 RedundancySwitch System withOutdoor Switch Unit642012-09-17
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