GE D25 User Manual

Contents

GE D25 User Manual Manual pdf 34 page image

D25User's Manual GE Grid Solutions34 994-0081-3.00-21 GE InformationPower Supply, ContinuedPower SupplySource• An IEC® 60947 compliant main disconnect switch (or other equivalent devicecomplying with IEC 60947-1/60947-3) must be as electrically close as practicalto the D25 power supply.• For the switching power supply to operate correctly, the input voltage must bewithin specified limits prior to turning on the power switch.• DC power supply modules draw an inrush current upon start-up.− Ensure the field source can supply this start-up current without overloading.• Use the field supply outputs only when external supplies are not available.− Use of an external supply improves immunity to EMI and increases powersupply efficiency.Digital InputsDigital InputModuleNote: The inputs of all variants of the S Cards are not polarity sensitive: theyare bipolar, and are isolated from the D25’s internal power supply.Digital Inputs The D25 can have up to 96 digital inputs in three banks of 32:• Digital Inputs 1 to 32 are on connectors A and B• Digital Inputs 33 to 64 are on connectors C and D• Digital Inputs 65 to 96 are on connectors E and FWetting Types All digital inputs require an input voltage signal large enough to turn on anoptical switch. The input levels required for each D25 digital input card typeare shown in the table below.• Low Voltage Digital Input cards can each be set to use:− Externally routed PSU supplied wetting (Supplied Wetting)− External wetting− Externally applied input voltage (Voltage Detect)• High Voltage Digital Input cards can each be set to use:− External wetting− Externally applied input voltage (Voltage Detect)