Termination of the RS485 bus is always recommended regardless ofthe cable length.16.4.5 Communication interfaces and protocolsTable 550:Supported station communication interfaces and protocolsProtocol Ethernet Serial100BASE-FX LC Glass fibre (STconnector) EIA-485IEC 61850–8–1 ● - -DNP3 ● ● ●IEC 60870-5-103 - ● ●● = Supported16.4.6 Recommended industrial Ethernet switchesABB recommends ABB industrial Ethernet switches.16.5 Connection diagramsThe connection diagrams are delivered on the IED Connectivity package DVD as partof the product delivery.The latest versions of the connection diagrams can be downloaded fromhttp://www.abb.com/substationautomation.Connection diagrams for Customized productsConnection diagram, 650 series 1.3 1MRK006501-ADConnection diagrams for Configured productsConnection diagram, REC650 1.3, (3Ph/1CBA) A01 1MRK006501-DDConnection diagram, REC650 1.3, (3Ph/1CBAB) A02 1MRK006501-CDConnection diagram, REC650 1.3, (BCAB) A07 1MRK006501-BD1MRK 511 287-UEN A Section 16IED physical connections599Technical manual