Bit of an open ended question,you can get an adaptable box and screw in some din rail and add the connectors of your choice,or spend several thousand pound on a custom built cabinet that fills the wall of your plant room .What material do you want the enclosures made from?some manufacturers only do plastic,others only metal.What sort of environment? no good putting an ip20 box outside in a petrochemical plant.Also do remember there is more than one type of din rail,and even the most popular,top hat,comes in a couple of different sizes