Ea elektro automatik microprocessor controlled laboratory bench psu ea ps 5000 ea elektro automatik 05100303 the ea elektro automatik ea ps 5040 20a is a programmable laboratory dc bench power supply rated at 0 to 40v 0 to 20a 320w this power supply offers a set of useful standard features which can facilitate operation set values actual values and status are clearly displayed at the same time on the blue illuminated lcd in order to view them at one glance this adjustable desk top p