Redundant device of management of inputs/outputs, in particular a routing system

The present invention relates to a management device I / O redundant, including a computer routing system. The device comprises first management means (1) and second management means (2) connected together by two interfaces, network (23) and a safety line (24), these means exchanging mutually interrogation messages through these two interfaces (23, 24), means (1) being as failures from other means (2) when they emit no messages in a time interval given on at least one of the two interfaces (23, 24). The invention applies in particular for the treatment of air traffic management information. More generally, it applies for all entries management systems and digital data outputs requiring high dependability with little additional cost.