16.4.2 Station communication rear connectionThe default IP address of the IED through the Ethernet connection is 192.168.1.10. Thephysical connector is X1/LAN1. The interface speed is 100 Mbps for the 100BASE-FXLC alternative.If the COM03 communication module is used, the X1/LAN1 A should be used. Forredundant kommunication, X1/LAN A and X2/LAN B should be used. LAN2 A is notused in this product.16.4.3 Optical serial rear connectionSerial communication can be used via optical connection in star topology. Connector typeis glass (ST connector). Connection's idle state is indicated either with light on or light off.The physical connector is X9/Rx,Tx.16.4.4 EIA-485 serial rear connectionThe communication module follows the EIA-485 standard and is intended to be used inmulti-point communication.For the complete list of available connection diagrams, please refer to Section Connectiondiagrams.For four-wire connections, to terminate far end of the RS485 bus with the built-in 120 ohmresistors, connect X8:4 – 11 for Tx and X8:2 – 9 for Rx. This can be set via the local HMIunder Configuration/Communication/Station communication/RS485 port/RS485GEN:1/WireMode = Four-wire.For two-wire connections, to terminate far end of the RS485 bus with the built-in 120 ohmresistors, connect X8:4 - 11. This can be set via the local HMI under Configuration/Communication/Station communication/RS485 port/RS485GEN:1/WireMode =Two-wire.Configure one of the node on the bus with BIAS (On) in order to set the bus signals on adefined level and non-floating which makes the bus more robust to disturbances. This canbe set via the local HMI under Configuration/Communication/Stationcommunication/RS485 port/RS485GEN:1/BIAS = On/Off.To use the chassis grounds (grounding the cable shield, for example), the cable shieldshould be grounded on one end at X8:8 (direct ground) and at the other end at X8:1 (viacapacitor).1MRK 511 287-UUS A Section 16IED physical connections643Technical manual
