Safety
Leuze electronic
MLC 520 EX
8
2.1.1 Intended use
• The safety sensor may only be used after it has been selected in accordance with the respectively
applicable instructions and relevant standards, rules and regulations regarding labor protection and
safety at work, and after it has been installed on the machine, connected, commissioned, and
checked by a competent person (see chapter 2.2).
• When selecting the safety sensor it must be ensured that its safety-related capability meets or
exceeds the required performance level PL
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ascertained in the risk assessment .
• The safety sensor protects persons or body parts at points of operation, danger zones or access
points of machines and plants.
• With the access guarding function, the safety sensor detects persons only when they enter the dan
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ger zone but cannot tell whether there are any persons inside the danger zone. For this reason, a
start/restart interlock in the safety chain is essential in this case.
• The construction of the safety sensor must not be altered. When manipulating the safety sensor, the
protective function is no longer guaranteed. Manipulating the safety sensor also voids all warranty
claims against the manufacturer of the safety sensor.
• The safety sensor must be inspected regularly by a competent person to ensure proper integration
and mounting (see chapter 2.2).
• The safety sensor must be exchanged after a maximum of 20 years. Repairs or the exchange of
parts subject to wear and tear do not extend the service life.
2.1.2 Foreseeable misuse
Any use other than that defined under the Approved purpose or which goes beyond that use is consid
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ered improper use.
In principle, the safety sensor is not suitable as a protective device for use in the following cases:
• Danger posed by ejected objects or the spraying of hot or hazardous liquids from within the danger
zone
• Applications in explosive or easily flammable atmospheres
2.2
Competent persons
Prerequisites for competent persons:
• They have a suitable technical education.
• They know the rules and regulations for labor protection, safety at work and safety technology and
can assess the safety of the machine.
• They know the instructions for the safety sensor and the machine.
• They have been instructed by the responsible person on the mounting and operation of the machine
and of the safety sensor.
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2.3
Responsibility for safety
Manufacturer and operating company must ensure that the machine and implemented safety sensor func
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tion properly and that all affected persons are adequately informed and trained.
The type and content of all imparted information must not lead to unsafe actions by users.
The manufacturer of the machine is responsible for:
• safe machine construction
• safe implementation of the safety sensor, verified by the initial test performed by a competent person
• imparting all relevant information to the operating company
• adhering to all regulations and directives for the safe starting-up of the machine
1. They perform a task related to the subject matter shortly thereafter and keep their knowledge up to date through continuous
further training.
