Maintenance Safeguarding System “Key-In-Pocket” from PILZ

September 5, 2023

Maintenance safeguarding system “key-in-pocket” | Pilz

In this animation you will learn how to protect your staff from the unauthorised restart of machines in maintenance situations. The digital Maintenance safeguarding system “key-in-pocket” ensures that a machine cannot be restarted as long as people are in danger zones.

Digital maintenance safeguarding enables more flexibility in maintenance

Authenticated operators identified by the PITreader access authorization system are logged in the Pilz control system (small controller PNOZmulti 2 or in the automation system PSS4000). The transponder key remains with the employee (“key in pocket”). The machine is only released when all employees have logged out.

In comparison to maintenance safeguarding with mechanical keys (lockout-tagout), it is possible to enter or leave the machine at any safety gate with this system. As a result, “key-in-pocket” offers your staff more flexibility and time savings during maintenance. The fully electronic restart protection therefore replaces mechanical interlocking devices as well as warning tags.

Especially suitable for machines with dangerous areas

With digital maintenance safeguarding, you always have an overview and control of which person has access to which machine and when. When entering the plant, the operator authenticates himself with his personal transponder key at the PITreader access authorization system on the safety door. The authorization is checked and only authorized personnel are then allowed to enter the plant. If a transponder key is lost, it can be easily blocked or reprogrammed. The key-in-pocket solution is therefore significantly cheaper and more flexible than systems made of metal.

You can also benefit from the manual reset function ” blind spot check” in accordance with EN ISO 13849-1 5.2.2. This requires a visual check of the machine for areas that are difficult to see before the system can be started up again. Before the system can be restarted, all persons must have logged out with their personal transponder key via the PITreader after leaving the plant.

This means that the machine can only be restarted after the last person has logged out via the PITreader. This offers you and your personnel reliable restart protection. A further advantage is that the plant does not have to be left by the same door through which the machine was entered. Certified up to PL d Cat. 3 according to EN ISO 13849-1, SIL CL 2 according to EN 62061 and SIL 2 according to IEC 61508.

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Related Product

Access Management for Your Plant and Machinery
Maintenance safeguarding system “key-in-pocket"

With PILZ’s “Identification and Access Management” portfolio, they offer you a comprehensive range of products, solutions and software for the implementation of safety as well as security tasks. Below you’ll discover more about potential applications, from simple authentication to complex access permissions, and access management through to safe operating mode selection, maintenance safeguarding and safeguarding of data and networks. Experience safety and security in one system!

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