Wago 3 way isolation amplifiers current or voltage signals wago 857 412 the wago 3 way isolation amplifier input signal 0 2 10v output 10 2v is a high quality amplifier fixed for voltage signals firmly adjusted the 6mm amplifier is not only characterised but also offer constantly bridgeable connections for supply voltages that are always at the same position that means simply bridging instead of individual wires offers galvanic separation all inputs outputs and supply circuits with