GE Grid Solutions D25User's ManualGE Information 994-0081-3.00-21 163Installing DNP3 I/O Modules in a RackRack SpacingWhen mounting multiple DNP3 I/O modules in a rack, or when mounting DNP3 I/O modules in a rackwith other equipment , verify that there is at least one rack unit (RU) of space above and below theDNP03 I/O module to allow for cooling air flow and cable routing (1 RU = 1.75 inches or 44.5 mm).Required ClearancesThe exterior dimensions of the DNP3 I/O module are:Dimension MeasurementWidth 19 inches (483 mm)Height 5.25 inches (133.4 mm)Depth 2.5 inches (63.5 mm)Allow about 14 inches (356 mm) of total cabinet depth, to provide clearance for cables and maintenanceaccess.Rack Mounting ProcedureTo mount the DNP3 I/O module in a rack:1. Determine the location of the DNP3 I/O module in a 19-inch mounting rack.2. Install, but do not tighten the top two mounting screws.Note Install the DNP3 I/O module with the LEDs visible from the front of the rack.3. Slide the DNP3 I/O module over the top mounting screws and drop down into position.4. Insert the bottom mounting screws.5. Tighten all four mounting screws.You are now ready to connect ground to the DNP I/O module. See “Connecting to protective ground” onpage 164.
