D25User's Manual GE Grid Solutions116 994-0081-3.00-21 GE InformationChapter 7: Upgrading and Replacing D25ModulesRemedialMaintenanceIf a board has failed on your D25 or you need to upgrade a specificcomponent, use this section of the guide, which explains:• How to remove and replace the main boards• How to enable and disable Serial XCOM Radio Keying• How to access and change Ethernet XCOM jumpers• How to change the power supply jumpers• How to change Input and Output cards and CT/PT interface modules• How to reconnect powerModule ReplacementAbout the D25Modules• All modules are accessed through the front of the enclosure.• I/O modules can be removed and replaced without disturbing field wiring.• Each printed circuit board (PCB) fits into a guide in the enclosure side panels.• Each daughter board has self-aligning connectors to ensure correct insertion.• All PCBs of different types are keyed to prevent improper insertion into thewrong location.ComponentLocationWith the front panel removed and the D25 WESDAC module removed, themodules are located as shown:D25 PCB/Connector Layout(Front View – WESDAC Card Removed)Digital InputBoardsXCOMCardIED/RTCCardPower SupplyCardShelf PlateD/O Board(Upside Down)A/I BoardPT/CT Modules
