Siemens Industry Online Support
Siemens AG
Entry type: FAQ, Entry ID: 24478544, Entry date: 03/05/2010

At which ambient temperature and at which air pressure can you operate a SIMATIC S7-300?

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You can operate the S7-300 at the following ambient temperatures:

  • in a vertical position from 0°C to 40°C
  • in a horizontal position from 0°C to 60°C

Fig. 01

The aforementioned temperature values are based on an air pressure of 1080 hPa to 795 hPa, which corresponds to 2000 m above sea level. Under these conditions SIMATIC S7 controllers can be operated with natural convection.

At a lower air pressure (and thus lower air density), when operating at greater heights, the cooling performance of natural convection drops. If you use an S7-300 in an environment other than mentioned, please contact Technical Support for alternative configuration options at: http://www.siemens.com/automation/support-request

More detailed information on setting up the S7-300 is available in the operating instructions "CPU 31xC and CPU 31x: Setting Up", in the "Configuration" chapter, in Entry ID: 13008499 .

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