Restrictions - Siemens SIMATIC S7-1500 System Manual

C.3

Restrictions

Restrictions of the max. ambient temperature specified with regard to the installation altitude
Installation altitude
-1 000 to 2 000 m
2 000 to 3 000 m
3 000 to 4 000 m
4 000 to 5 000 meters
1)
Note
• Linear interpolation between altitudes is permissible.
• The derating factors compensate for the decreasing cooling effect of air in higher altitudes
due to lower density.
• Note the mounting position of the respective module in the technical specifications. The
basis is the standard IEC 61131-2.
• Make sure that the power supplies you use are also rated for altitudes > 2 000 m.
• The displays of the R/H-CPUs are designed for an altitude of ≤ 3 000 m. When operating
the device at altitudes > 3 000 m, you might experience problems with the CPU display in
rare cases; however, these do not affect the mode of operation of the CPU.
• The "Safety-related shutdown of standard modules" function, as described on the Internet
(https://support.industry.siemens.com/cs/us/en/view/39198632), is only released up to a
maximum of 2 000 m.
• The synchronization modules for the CPU 1517H-3 PN and CPU 1518HF-4 PN (sync
module 1 GB FO 10 m: 6ES7960-1CB00-0AA5, sync module 1 GB FO 10 km:
6ES7960-1FB00-0AA5, sync module 1 GB FO 40 km: 6ES7960-1FE00-0AA5) are also
released for 5 000 m.
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
Use over 2 000 m above sea level and extended temperature range
Base value for the application of the derating factor is the maximum permissible ambient tempera-
ture in °C for 2,000 m
Derating factor for ambient temperature
1.0
0.9
0.8
0.7
C.3 Restrictions
1)
501