Section 21 Remote communication21.1 Binary signal transfer21.1.1 IdentificationFunction description IEC 61850 identification IEC 60617identificationANSI/IEEE C37.2device numberBinary signal transfer, receiveBinSignRec1_1BinSignRec1_2BinSignReceive2- -Binary signal transfer, 2MbitreceiveBinSigRec1_12MBinSigRec1_22M - -Binary signal transfer,transmitBinSignTrans1_1BinSignTrans1_2BinSignTransm2- -Binary signal transfer, 2MbittransmitBinSigTran1_12MBinSigTran1_22M - -21.1.2 ApplicationThe IEDs can be equipped with communication devices for line differentialcommunication (not applicable for RER670) and/or communication of binary signalsbetween IEDs. The same communication hardware is used for both purposes.Sending of binary signals between two IEDs is used in teleprotection schemes and fordirect transfer trips. In addition to this, there are application possibilities, for example,blocking/enabling functionality in the remote substation, changing setting group inthe remote IED depending on the switching situation in the local substation and so on.If equipped with a 64kbit/s LDCM module, the IED can be configured to send either192 binary signals or 3 analog and 8 binary signals to a remote IED. If equipped witha 2Mbps LDCM module, the IED can send 9 analog channels and 192 binary channelsto a remote IED.Link forwardingIf it is not possible to have a communication link between each station, the solution hasbeen to set the protection up in a slave-master-slave configuration. This means that inFigure 339, only IED-B has access to all currents and, therefore, this is the only placewhere the differential current is evaluated. If the evaluation results in a trip, the tripsignal will be sent over the two communication links.1MRK 502 071-UEN - Section 21Remote communicationGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 713Application manual
