Siemens SIMOTICS L-1FN3 Operating Instructions Manual page 101

Naturally ventilated linear motors
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Risk of electric shock as a result of residual voltages
There is a risk of electric shock if hazardous residual voltages are present at the motor
connections. Even after switching off the power supply, active motor parts can have a charge
exceeding 60 μC. In addition, even after withdrawing the connector 1 s after switching off the
voltage, more than 60 V can be present at the free cable ends.
• Wait for the discharge time to elapse.
Incorrect commutation
Incorrect commutation can result in uncontrolled motor movements.
• When installing and replacing an encoder, ensure the correct commutation setting.
• Only carry out the associated work if you have been appropriately trained.
Fire hazard resulting from hot surfaces
You can suffer from burns if you touch the surfaces of the motors. The surface temperature of
the motors may be more than 100° C (212° F).
• Never touch the motor during or immediately after use.
• Attach the "Hot Surface Do Not Touch" (W017) warning sign close to the source of danger
NOTICE
Thermal damage to temperature-sensitive parts
Some parts of the electrical motor enclosure can reach temperatures that exceed 100 °C. If
temperature-sensitive parts, for instance electric cables or electronic components, come into
contact with hot surfaces then these parts can be damaged.
• Ensure that no temperature-sensitive parts come into contact with hot surfaces.
NOTICE
Motor destroyed as a result of overheating
The motor may overheat without temperature protection and be destroyed.
• Check whether the temperature protection is effective before switching on the DC link
Naturally-Cooled 1FN3 Linear Motors
Operating Instructions, 06/2023, A5E52220465B AB
WARNING
WARNING
WARNING
where it can be easily seen.
voltage for the first time!
7.1 Safety instructions for commissioning
Commissioning
99

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