Automated warehouse with safe access system

An automated warehouse, comprising:

• at least one main path, a plurality of secondary paths transversal to the at least one main path with a plurality of storage stations arranged along the secondary paths;
• at least one main vehicle with electric traction, movable along the at least one main path;
• at least one auxiliary vehicle with electric traction powered by a battery and/or supercapacitor, movable along the secondary paths and transportable by the at least one main vehicle;
• at least one access point at a fixed position in the automated warehouse;
• each main vehicle and auxiliary vehicle having installed:
• a wireless device configured to receive and send wireless signals;
• and
• a respective control unit with associated with safety modules including a respective safety-certified watchdog timer and a respective counter;
• wherein the wireless device on each vehicle is configured to send, directly or indirectly to the at least one access point, at predetermined time intervals, a check signal containing a value of the counter of the vehicle transmitting said check signal;
• the at least one access point is set to send to the wireless devices signals in response to received check signals;
• each time a response signal is received by a wireless device, the respective counter is incremented or decremented and the respective safety-certified watchdog timer starts measuring time from when the value of the respective counter differs from the value received via the check signal;
• each control unit being set to de-energize a respective vehicle upon detection, via the respective safety-certified watchdog timer, that a time longer than a predetermined time has elapsed.