Wago feeding isolator wago 857 420 the wago feeding isolator is a high quality repeater power supply configurable with current and voltage output the 6mm flat isolation amplifiers are not only the same contour but also the continuous bridgeable connections for the supply voltages are always at the same position meaning simple bridges instead of individual wires with the galvanic separation all inputs outputs and supply circuits are separated with a testing voltage from 2 5kv configur