Ea elektro automatik ea if interfaces ea elektro automatik 33100214 this is the ea elektro automatik if c1 digital interface between power supplies or electronic loads and pcs or plcs these pluggable cards are recognised by the host unit automatically and corresponding menu choices become enabled the if c1 supports the parallel or serial connection of multiple power supplies or electronic loads in the ea psi and ea el series to create a masterslave system using system link mode it is c