Table 561:IRIG-BType Value AccuracyInput impedance 430 Ohm -Minimum input voltageHIGH4.3 V -Maximum input voltageLOW0.8 V -Table 562:EIA-485 interfaceType Value ConditionsMinimum differentialdriver output voltage1.5 V –Maximum output current 60 mA -Minimum differentialreceiver input voltage0.2 V -Supported bit rates 300, 600, 1200, 2400,4800, 9600, 19200,38400, 57600, 115200-Maximum number of 650IEDs supported on thesame bus32 -Max. cable length 925 m (3000 ft) Cable: AWG24 or better, stub lines shall be avoidedTable 563:Serial rear interfaceType Counter connectorSerial port (X9) Optical serial port, type ST for IEC 60870-5-103 andDNP serialTable 564:Optical serial port (X9)Wave length Fibre type Connector Permitted path attenuation1)820 nm MM 62,5/125 μmglass fibre coreST 6.8 dB (approx. 1700m length with 4 db /km fibre attenuation)820 nm MM 50/125 μmglass fibre coreST 2.4 dB (approx. 600m length with 4 db / kmfibre attenuation)1) Maximum allowed attenuation caused by fibre17.8 Enclosure class1MRK 511 287-UUS A Section 17Technical data649Technical manual
