Puls din rail power supply redundancy module 4080a puls yr80242 this redundancy module from puls has been manufactured to a high standard with a compact design that is ideal for installation in an enclosure and intended for general professional use such as in industrial control office communication and instrumentation equipmentthe psu can be used to build 11 and n1 redundant systems it is equipped with two input channels which can be connected to power supplies with up to 40a outp