interoperates with other IEC 61850-compliant IEDs, and systems and simultaneouslyreports events to five different clients on the IEC 61850 station bus.The Denial of Service functions DOSLAN1 and DOSFRNT are included to limit theinbound network traffic. The communication can thus never compromise the primaryfunctionality of the IED.The event system has a rate limiter to reduce CPU load. The event channel has a quota of10 events/second after the initial 30 events/second. If the quota is exceeded the eventchannel transmission is blocked until the event changes is below the quota, no event is lost.All communication connectors, except for the front port connector, are placed onintegrated communication modules. The IED is connected to Ethernet-basedcommunication systems via the fibre-optic multimode LC connector(s) (100BASE-FX).The IED supports SNTP and IRIG-B time synchronization methods with a time-stampingaccuracy of ±1 ms.• Ethernet based: SNTP and DNP3• With time synchronization wiring: IRIG-BThe IED supports IEC 60870-5-103 time synchronization methods with a time stampingaccuracy of ±5 ms.16.2.3 Communication interfaces and protocolsTable 542:Supported station communication interfaces and protocolsProtocol Ethernet Serial100BASE-FX LC Glass fibre (ST connector) EIA-485IEC 61850–8–1 ● - -DNP3 ● ● ●IEC 60870-5-103 - ● ●● = SupportedSection 16 1MRK 506 335-UUS AStation communication718Technical manual
