Safety
Leuze electronic
MC3x
8
2.1.1 Proper use
• Safety Relay, sensor and actuator are intended for use in protective door monitoring in accordance
with EN 1088 and EN 60947-5-3.
• They are used for the safety-related monitoring of moveable guards and, thus, for the protection of
persons at entry or access areas of points of operation on machines and systems (e.g., protective
door, sliding gate, protective hoods).
• Safety Relay, sensor and actuator must only be used after they have been selected in accordance
with the respectively applicable instructions and relevant rules, standards and regulations regarding
labor protection and safety at work, and after they have been mounted on the machine, connected,
commissioned, and checked by a competent person.
• When selecting the Safety Relay, sensor and actuator, it must be ensured that their safety-related
capability meets or exceeds the required Performance Level ascertained in the risk assessment. For
the table of safety-related characteristic parameters, see chapter 13 „Technical data“.
• The MC3x sensors may only be operated with the approved MC3x actuators and MSI-MC3x Safety
Relays. Proper function with respect to safety can be ensured only if compatible components are
used.
• Safety Relay, sensor and actuator must be in perfect condition and periodically inspected by compe
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tent persons.
• If the point of operation can be reached within the stopping time of the dangerous process, a Safety
Locking Device must be used instead of the Magnetically Coded Sensor.
• The guard must be dimensioned and mounted in such a way that reaching or stepping around is not
possible.
• MC3x only reports persons upon opening of the guard, not whether persons are located in the dan
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ger zone. For this reason, a start/restart interlock in the safety chain is essential for access safe
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guarding.
• Sensor and actuator must be connected to the fixed or moveable guard in a permanent and tamper
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proof manner. The mounting conditions must be observed (see chapter 6 „Mounting“).
• The sensors and their actuators are to be protected against strong physical shocks and vibrations.
Observe the permissible environmental conditions for storage and operation (see chapter 13
„Technical data“).
• Sensor and actuator must be protected against foreign bodies (e.g., iron filings and blasting agents).
• The normally closed contacts of the MSI-MC310 are used to signal the state. Use as safety-related
contacts is not permitted.
• Sensor and actuator must be connected in such a way that a dangerous process can only be acti
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vated while the guard is closed and so that a stop command that ends the dangerous process is trig
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gered upon opening of the guard.
• Cable gland, insulation materials and connecting wires of the appropriate protection rating are to be
used.
• Safety Relay, sensor and actuator must be replaced after a maximum of 20 years (see chapter 13
„Technical data“). Repairs or the exchange of parts subject to wear and tear do not extend the ser
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vice life.
• Damaged components must be replaced immediately.
• Sensor or actuator must neither be tampered with nor may their correct position be changed.
• External magnets must not be used nor may the contacts be bridged.
• No structural changes may be made to Safety Relay, sensor or actuator. When manipulating, the
protective function is no longer guaranteed. In addition, all guarantee claims against the manufac
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turer shall no longer apply.
2.1.2 Foreseeable misuse
Any use other than that defined under the “approved purpose” or which goes beyond that use of the Safety
Relay, sensor and actuator is considered improper use!
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