SiemensSiemensSiemensSiemensSiemens IndustryIndustryIndustryIndustryIndustry,,,,, Inc.Inc.Inc.Inc.Inc.BuildingBuildingBuildingBuildingBuilding TTTTTececececechnologies Dihnologies Dihnologies Dihnologies Dihnologies DivisionvisionvisionvisionvisionINTRODUCTION The Model NRC Network Ring card from Siemens Industry,Inc. is a card that networks multiple FireFinder-XLS systemstogether in a Class X (Style 7) ring. The NRC can also beconfigured for Class B (Style 4) operation in systems wherea ring is not required, as an alternative to the NIC-C card.It provides communication between its host FireFinder-XLSsystem and other FireFinder-XLS systems on an XNET network.It replaces the NIC-C when a ring connection is needed.The NRC can also be used to connect an NCCNT-G to theXNET network. In this configuration, all events occurring onthe FireFinder-XLS network are displayed at the NCCNT-G.One NRC is required in each FireFinder-XLS system on thenetwork. This NRC must reside in the same enclosure as thePMI/PMI-2.The NRC supervises the network to ensure proper opera-tion. Any faults that are detected by the NRC are reported tothe PMI/PMI-2 for annunciation. In addition, the NRC hasdiagnostic LEDs that indicate which faults have been found.The NRC performs ground fault detection on its outgoingring port.Features The NRC isolates faults to the individual link in trouble. Whenwired for Class X (Style 7), network ring communicationcontinues unaffected.An RJ-12 monitor jack is included for connection of XNETdiagnostic tools. In addition, RJ-45 and USB jacks areincluded for firmware download. These jacks are located onthe front bezel.Network Ring CardInstallation InstructionsModel NRCNRCRESETPOWERCARD FAILTROUBLEMONITORPORTETHERNETUSBFigure 1NRC Network Ring CardA6V10322639_b_en_--