2 INTERFACES2.1 FRONT SERIAL PORTFront serial port (SK1)Use For local connection to laptop for configuration purposesStandard EIA(RS)232Designation SK1Connector 9 pin D-type female connectorIsolation Isolation to ELV levelProtocol CourierConstraints Maximum cable length 15 m2.2 DOWNLOAD/MONITOR PORTFront download port (SK2)Use For firmware downloads or monitor connectionStandard Compatible with IEEE1284-ADesignation SK2Connector 25 pin D-type female connectorIsolation Isolation to ELV levelProtocol ProprietaryConstraints Maximum cable length 3 m2.3 REAR SERIAL PORT 1Rear serial port 1 (RP1)Use For SCADA communications (multi-drop)Standard EIA(RS)485, K-busConnector General purpose block, M4 screws (2 wire)Cable Screened twisted pair (STP)Supported Protocols * Courier, IEC-60870-5-103, DNP3.0, MODBUSIsolation Isolation to SELV levelConstraints Maximum cable length 1000 m* Not all models support all protocols - see ordering options2.4 FIBRE REAR SERIAL PORT 1Optional fibre rear serial port (RP1)Main Use Serial SCADA communications over fibreConnector IEC 874-10 BFOC 2.5 –(ST®) (1 each for Tx and Rx)Fibre type Multimode 50/125 μm or 62.5/125 μmSupported Protocols Courier, IEC870-5-103, DNP 3.0, MODBUSWavelength 850 nmChapter 16 - Technical Specifications MiCOM P747386 P747-TM-EN-1
