
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, 02/2013, A5E00105505-08
25
1.5 Specification of dielectric tests, protection class, degree of
protection, and rated voltage of S7-300
Test voltage
Proof of dielectric strength must be provided in the type test at a test voltage to IEC 61131-2:
Circuits with rated voltage V
e
to other circuits or ground. Test voltage
< 50 V 500 VDC
< 150 V 2500 VDC
< 250 V 4000 VDC
Protection class
Protection class I to IEC 60536, i.e., a protective conductor must be connected to the
mounting rail!
Protection against the ingress of foreign matter and water
● Degree of protection IP 20 to IEC 60529, i.e., protection against contact with standard
probes.
No protection against the ingress of 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.
Rated voltages Tolerance
24 VDC 20.4 VDC to 28.8 VDC
120 VAC 93 VAC to 132 VAC
230 VAC 187 VAC to 264 VAC
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