4.4 Ensuring cooling
Ensure that the machine is sufficiently cooled by the cooling air flow at the installation site:
● Ensure that the cooling air can flow in and out unobstructed. The full air flow provided by
the fan is only possible if air can freely enter the impeller. In the axial direction, ensure a
clearance of at least 1 x air intake diameter.
● Make sure that the machine does not draw in the hot discharged air again.
● For machines with a vertical type construction with an air intake from above, ensure that
the air inlets are protected against the ingress of foreign bodies and water.
4.5 Interlock circuit for the external fan motor
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.
See also
Connecting an external fan motor (Page 58)
4.6 System-inherent frequencies
NOTICE
Machine damage caused by system resonances
The system consisting of the foundation and machine set must be configured and matched
in such a way that no system resonances can arise and result in the permissible vibration
levels being exceeded. Excessive vibrations can damage the machine set. The vibration limit
values according to DIN ISO 10816-3 must not be exceeded.
Preparations for use
4.6 System-inherent frequencies
SIMOTICS DC 1GG5
24 Operating Instructions 02/2016
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