44 • Fieldbus CouplerFieldbus Coupler 750-341WAGO-I/O-SYSTEM 750ETHERNET TCP/IPAttention!Only for use in LAN, not for connection to telecommunication circuits!3.1.2.4 Display ElementsThe operating condition of the coupler or the node is displayed with the helpof illuminated indicators in the form of light-emitting diodes (LEDs).The LED information is routed to the top of the case by light fibres. In somecases, these are multi-colored (red/green or red/green/orange).24V 0V+ +01 02LINKMSNSI/OETHERNETCDBATxD/RxDUSRCBA24V 0V+ +01 02LINKMSNSI/OETHERNETCDBATxD/RxDCBACA24V 0V+ +01 02LINKMSNSI/OETHERNETCDBATxD/RxDCBAABCAFig. 3.1-3: Display Elements 750-341 g034102xLED Color MeaningLINK green Link to a physical network existsMS red/green The ‚MS‘-LED indicates the state of the node (Module State)NS red/green The ‚NS‘-LED indicates the state of the network (Network State)TxD/RxD green Data exchange taking placeIO red /green/ orangeThe 'I/O'-LED indicates the operation of the node and signals faultsencounteredA green Status of the operating voltage – systemC or B green Status of the operating voltage – power jumper contacts(LED position is manufacturing dependent)3.1.2.5 Configuration interfaceThe configuration interface used for the communication with WAGO-I/O-CHECK or for firmware download is located behind the cover flap.ConfigurationinterfaceopenflapFig. 3.1-2: Configuration interface g012945eThe communication cable (750-920) is connected to the 4 pole header.
