D25User's Manual GE Grid Solutions4 994-0081-3.00-21 GE InformationDownloading a Configuration........................................................................................... 96Chapter 5: Operating the D25 ......................................................................................................... 105LED Indicators................................................................................................................ 105Controls Switch............................................................................................................... 106Using Current-Monitored Digital Outputs ...................................................................... 108Chapter 6: Servicing the D25 .......................................................................................................... 110Fuse Replacement ........................................................................................................... 111Battery Replacement ....................................................................................................... 113Chapter 7: Upgrading and Replacing D25 Modules ..................................................................... 116Module Replacement ...................................................................................................... 116Main Board ..................................................................................................................... 118DDSP Modules ............................................................................................................... 122Memory Expansion Board .............................................................................................. 123Shelf Plate ....................................................................................................................... 123Configuring Radio Keying Option.................................................................................. 126D25 Ethernet Card 100Base (10/100Base-T and 100Base-FX) ..................................... 127Power Supply Card ......................................................................................................... 129Digital Input Cards.......................................................................................................... 131Digital Output Card ........................................................................................................ 132DC Analog Input Card .................................................................................................... 133CT/PT Modules............................................................................................................... 134Reconnecting Power ....................................................................................................... 143Chapter 8: Troubleshooting ............................................................................................................ 144Run-time and Startup Problems ...................................................................................... 144Initialization Errors ......................................................................................................... 146LAN-Based Problems ..................................................................................................... 147Reporting Problems ........................................................................................................ 148Appendix A: Product Specifications .................................................................................................. 152Electrical Specifications.................................................................................................. 152Testing and Certification................................................................................................. 156Approvals ........................................................................................................................ 156Physical Specifications ................................................................................................... 157Storage and Battery ......................................................................................................... 158Appendix B: Engineering Value Calculations .................................................................................. 159Conversion Formulas ...................................................................................................... 159