Client DP module is very hot

Is it normal, that my Client DP module is so hot, that I can not hold the back side for more then 5 seconds?
I have the next modules connected to spider:
j11d - ethernet
music
TE35
sd
button
temp and humidity

Universal adapter 12V, max current 1,5A.
Would it be better to switch universal adapter to lower voltage?

DP module is a switching power supply. the above calculation does not apply.