Ensure Adequate Cooling; Interlock Circuit For The External Fan Motor - Siemens SIMOTICS SD 1LE5 Operating Instructions Manual

Preparing for use

4.6 Ensure adequate cooling

4.6 Ensure adequate cooling
Overheating and failure of the motor
Death, severe injury or material damage can occur if you do not carefully observe the
following points.
• Do not obstruct ventilation.
• Prevent the air expelled by neighboring equipment from being immediately sucked in
• For vertical types of machine construction with the air intake from above, protect the air
• If the shaft extension is facing upwards, liquid must be prevented from entering by
Damage caused by small parts falling in
Material damage and injury can occur if the fan is destroyed and therefore the motor
overheats.
• For types of construction with the shaft extension facing downwards, prevent small parts
• Ensure that the cooling air flow is not reduced as a result of covers and that the
4.6.1

Interlock circuit for the external fan motor

For machines with external fans, install an interlock circuit that prevents the main machine
being switched on if the external fan is not operational.
36
WARNING
again.
intakes from the ingress of foreign bodies and water.
moving along the shaft.
WARNING
from falling into the fan cover by providing suitable covers.
minimum air clearances are maintained.
1LE5, 1PC4 shaft height 315/355
Operating Instructions, 10/2020, A5E41454666A