This Ross DFR-8110A Digital Terminal comes with several key cards. It includes seven UDA-9005 cards, one VEA8007A card, two ADC-8035 cards, and a power supply. The correct power supply is included. There is one known issue: one of the power supply fans is slightly noisy.

Using the Ross DFR-8110A Digital Terminal is straightforward. First, make sure the power supply is correctly connected. Then, you can start using the various cards that come with it. For the UDA-9005, VEA8007A, and ADC-8035 cards, just insert them into the appropriate slots. When it comes to maintenance, keep the terminal in a clean and dry place. If you notice the power supply fan getting noisier, you can try gently cleaning it. However, be careful not to damage any components. Also, always turn off the power before making any changes or performing maintenance.