Siemens SIMATIC NET CP 1542-5 Equipment Manual page 44

Table of Contents

Technical specifications

6.4 Ambient temperature

The following derating factors and maximum ambient temperatures apply.

Table 6- 2

Installation altitude

(Height above mean

sea level)

-1000 m to 2000 m

2000 m to 3000 m

3000 m to 4000 m

4000 m to 5000 m

Basic value for applying the derating factor is the maximum permissible ambient temperature in °C

Note

• The derating factors compensate for the decreasing cooling effect of air at higher altitudes

due to lower density.

• Linear interpolation between altitudes is permissible.

Restrictions of the maximum permissible ambient temperature in relation to the

installation altitude

Derating factor

for 2000 m.

Maximum ambient temperature when the rack is

1.00

0.93

0.86

0.78

Equipment Manual, 01/2023, C79000-G8976-C326-05

mounted horizontally

60 °C

56 °C

52 °C

47 °C

SIMATIC CP 1542-5

Table of Contents

S7-1500