You can use the ProCurve DACs with the Comware (A Series) switches, I do it all the time. ProCurve switches will only work with ProCurve DACs and optics though, so you cannot use an A Series DAC to connect to a ProCurve switch.
Note that you will get an error on the comware console saying the cable is not H3C, and is therefore not covered by the H3C warranty - but it works just the same.