Puls ub20 241 din rail power supply single phase 24vdc 20a 480w puls ub20 241 this din rail power supply from puls has been manufactured to a high standard with a compact design that is ideal for installation in an enclosure and intended for general professional use such as in industrial control office communication and instrumentation equipment p the uninterruptible power supply controller dc ups is used in addition with a 24v power supply and batteries to bridge power failures or vo