When a machine is being maintained, it is important that the personnel can perform the work conscientiously and that the plant and machinery never starts up during this work. Digital maintenance safeguarding therefore ensures that only authorised persons gain access.
For the safe performance of maintenance work, the new “key-in-pocket” maintenance safeguarding system from Pilz protects operators from unauthorised restart of a machine. The digital maintenance safeguarding system is based on the access permission system PITreader and is implemented with the Pilz controllers PNOZmulti 2 or PSS 4000. It guarantees safety and industrial security, as only authorised persons can access the plant or machinery during the maintenance process. This prevents manipulation and incorrect operation.
The personal ID is the key
Users receive an RFID key with their individual permissions that are read out with PITreader at the safety gate. One or more users authorised for maintenance work can use these to authenticate themselves on the plant. In the controller, a personalised security ID is stored in a safe list. The machine can now be switched off, the safety gate opened and the machine entered. “Key-in-pocket” makes sure that the machine does not restart in this time and that no unauthorised persons gain access. After the maintenance work, all persons log out, the security IDs are removed and the machine can be restarted.
The solution thus offers safety from a dangerous restart as well as industrial security, as manipulation of the maintenance work is not possible. The digital maintenance safeguarding system is specially designed for machinery with dangerous areas that are secured with safety fences and thus offers a flexible, economical alternative
to mechanical lockout tagout maintenance
safeguarding systems.
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