Abstract: An electrical and/or optical interface device between a first piece of equipment, especially of the automatic-machine type, and at least one other piece of equipment of an industrial plant, is disclosed. The device is capable of receiving at least one multipoint connector for serving communication channels between functional elements of the first piece of equipment and functional elements of at least said other piece of equipment, and it is made in the form of a modular assembly whose components are distributed among an alignment of functional modules, of the terminal-block type, that are placed side by side. Each communication channel is served by a functional module containing the interface components which fulfill out the functions that relate to this channel and receiving the multipoint connector part serving this channel, the various functions carried out by the interface device being distributed among various functional modules of said alignment.