Abstract: A communicating lockout device of an item of equipment comprising locking means able to maintain the equipment in a fixed position, a communication module able to communicate data relating to said device and a local power supply module adapted to supply electrically at least the communication module, the power supply module comprising a charge monitoring unit arranged for measuring the charge level of the local power supply module. The invention also relates to a network for the supervision of a plurality of items of equipment using such a communicating device as well as to a corresponding supervision method.