Specification Of Dielectric Tests, Protection Class, Degree Of Protection, And Rated Voltage Of S7-300; Rated Voltages Of S7-300 - Siemens SIMATIC Manual

1.5 Specification of dielectric tests, protection class, degree of protection, and rated voltage of S7-300

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.
Rated voltages
24 VDC
120 VAC
230 VAC
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
Tolerance
20.4 VDC to 28.8 VDC
93 VAC to 132 VAC
187 VAC to 264 VAC
General technical data
25