Siemens SIMOTICS L-1FN3 Configuration Manual page 139

Danger of crushing by permanent magnets of the secondary section
The forces of attraction of magnetic secondary sections act on materials that can be
magnetized. The forces of attraction increase significantly close to the secondary section.
The trigger threshold of 3 mT for a risk of injury due to attraction and projectile effect is
reached at a distance of 150 mm (directive 2013/35/EU). Secondary sections and materials
that can be magnetized can suddenly slam together unintentionally. Two secondary
sections can also unintentionally slam together.
There is a significant risk of crushing when you are close to a secondary section.
Close to the secondary section, the forces of attraction can be several kN – example:
Magnetic attractive forces are equivalent to a force of 100 kg, which is sufficient to trap a
body part.
• Do not underestimate the strength of the attractive forces, and work very carefully.
• Wear safety gloves.
• The work should be done by at least two people.
• Do not unpack the secondary section until immediately before assembly.
• Never unpack several secondary sections at the same time.
• Never place secondary sections next to one another without taking the appropriate
• Never place any metals on magnetic surfaces and vice versa.
• Never carry any objects made of magnetizable materials (for example watches, steel or
• Immediately mount the secondary section that has just been unpacked.
• Always comply with the specified procedure.
• Avoid inadvertently traversing direct drives.
• Keep the following tools at hand to release parts of the body (hand, fingers, foot etc.)
1FN3 linear motors
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
WARNING
precautions.
iron tools) and/or permanent magnets close to the secondary section! If tools that can
be magnetized are nevertheless required, then hold the tool firmly using both hands.
Slowly bring the tool to the secondary section.
trapped between two components:
– A hammer (about 3 kg) made of solid, non-magnetizable material
– Two pointed wedges (wedge angle approx. 10° to 15°, minimum height 50 mm)
made of solid, non-magnetizable material (e.g. hard wood).
Configuration
5.4 Mounting
137