General technical data
1.5 Specification of dielectric tests, protection class, degree of protection, and rated voltage of S7-300
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
25
1.5 Specification of dielectric tests, protection class, degree of
protection, and rated voltage of S7-300
Isolation
The isolation is designed in accordance with the requirements of EN 61131-2.
Pollution degree/overvoltage category according to IEC 61131-2: 2007
Proof of dielectric strength must be provided in the type test at a test voltage according to
IEC 61131-2:
● Pollution degree 2
● Overvoltage category: II
Protection class in accordance with IEC 61131-2: 2007
The automation system S7-300 meets Protection Class I and contains parts of Protection
Classes II and III.
Degree of protection IP20
Degree of protection IP 20 in accordance with IEC 60529 for all modules of the S7-300
automation system, i.e.:
● Protection against contact with standard test finger
● Protection against foreign objects with diameters greater than 12.5 mm
● No protection against water
1.6 Rated voltages of S7-300
Rated operating voltages
The S7-300 modules operate at different rated voltages. The table shows the rated voltages
and corresponding tolerances.
120 VAC 93 VAC to 132 VAC
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