There are two different models of 7RU frames, and two models of power
supply units. They are not interchangeable.
• If you have a frame model KXA-FR7-B then you can't use this Power Supply, Instead you need the KXA-PSU-7-B power supply (Not offered)• If you have a frame model KXA-FR7 then this Power Supply KXA-PSU-7 as shown is the correct PSU power supply to choose.
Miranda/Grass Valley 7RU KaleidoX "Frame-A" Power Supply