Specifications For Nominal Line Voltages, Isolation Tests, Protection Class, And Degree Of Protection - Siemens S7-300 Installation And Operating Manual

General technical data

7.6 Specifications for Nominal Line Voltages, Isolation Tests, Protection Class, and Degree of Protection

Climatic environmental conditions
Climatic environmental conditions for the operation of fail-safe signal modules:
Environmental conditions
Temperature:
Horizontal mounting position:
Vertical mounting position:
Relative humidity
Air pressure
Pollutant concentration
7.6 Specifications for Nominal Line Voltages, Isolation Tests, Protection
Class, and Degree of Protection
Rated operating voltages
The fail-safe signal modules operate at a rated voltage of 24 VDC; tolerance = 20.4 VDC to
28.8 VDC.
We recommend using power supplies of the Siemens "SITOP power" series.
Test voltages
The isolation test to IEC 61131-2 and the following:
Circuits with rated voltage V
Protection class
Protection class I to IEC 60536 (VDE 0106, Part 1), that is, the mounting rail must be bonded
to ground!
70
Fields of application
from 0°C to 60°C
from 0°C to 40°C
from 5 to 95 %
1080 hPa to 795 hPa
SO : < 0.5 ppm;
2
Relative humidity < 60%,
no dewing
H S: < 0.1 ppm;
2
Relative humidity < 60%,
no dewing
to other circuits or
in
ground
0 V < V ≤ 50 V
in
—
No condensation; corresponds to
relative humidity (RH) stress level
2 to IEC 61131-2
Corresponds to an altitude of
-1000 m to 2000 m
Test:
10 ppm; 4 days
1 ppm; 4 days
Test voltage
500 VDC
Installation and Operating Manual, 01/2010, A5E00085586-10
Comments
Fail-safe signal modules