Puls ub dc usp control units with battery 225v dc 10a 240w puls uf20241 a buffer unit from puls to bridge 24v brown outs and black outs as power saver the electrolytic capacitors works service free enabling an application up to 70c they are parallel connected to 24v dc power puls uf20241 dc usp control unit for 310 ms 225v dc 20a