Fieldbus Coupler 750-341 • 43HardwareWAGO-I/O-SYSTEM 750ETHERNET TCP/IP3.1.2.2 Device supplyThe supply is made via terminal bocks with CAGE CLAMP® connection. Thedevice supply is intended both for the system and the field units12345678DCDC24 V10 nF24 V10 nF0 V24 V /0 V24 V0 V0 V750-341FiELDBUS INTERFACEELECTRONIC ELECTRONICFiELDBUSINTERFACEI/OMODULESFig. 3.1-2: Device supply G034101eThe integrated internal system supply module generates the necessary voltageto supply the electronics and the connected I/O modules.The fieldbus interface is supplied with electrically isolated voltage from theinternal system supply module.3.1.2.3 Fieldbus connectionConnection to the fieldbus is by a RJ45 connector. The RJ45 socket on thefieldbus coupler is wired per the 100BaseTX standard. The specification forthe connecting cable is a twisted pair cable of Category 5. Cables of type S-UTP (Screened-Unshielded Twisted Pair) and STP (Shielded Twisted Pair)with a maximum segment length of 100 meters may be used.The RJ45 socket is physically lowered for the coupler to fit in an 80 mm highswitch box once connected.The electrical isolation between the fieldbus system and the electronics isachieved by DC/DC converters and optocouplers in the fieldbus interface.Contact Signal1 TD + Transmit +2 TD - Transmit -3 RD + Receive +4 free5 free6 RD - Receive -7 free8 freeFig. 3.1-1: RJ45-Connector and RJ45 Connector Configuration
