Siemens SIMATIC ET 200SP System Manual page 288

Protection class according to IEC 61131-2:2007 and IEC 61010-2-201
The ET 200SP distributed I/O system meets protection class I and includes parts of
protection classes II and III.
The grounding of the mounting rail must meet the requirements for a functional earth FE.
Recommendation: For an interference-proof installation, the ground conductor should have a
cross-section > 6 mm
The installation location (e.g. enclosure, control cabinet) must have a protective conductor
connection that meets the standard to maintain protection class I.
Degree of protection IP20
Degree of protection IP20 according to IEC 60529 for all modules of the ET 200SP
distributed I/O system, which means:
● Protection against contact with standard probes
● Protection against foreign objects with diameters in excess of 12.5 mm
● No protection against water
Note
Use a BU cover
To meet the requirements of the degree of protection "IP20", fit a BU cover onto unfitted
BaseUnits.
To ensure touch safety, fit a cover onto the opening of the infeed bus contacts belonging to
the last plugged-in motor starter BaseUnit.
Rated voltage for operation
The ET 200SP distributed I/O system works with the rated voltage and corresponding
tolerances listed in the following table.
Note the supply voltage of each module when selecting the rated voltage.
Table 14- 11 Rated voltage for operation
Rated voltage
24 V DC
120 V AC
230 V AC
400 V AC
Static value: Generation as protective extra low voltage with safe electrical separation in accord-
1)
ance with IEC 61131-2 or. IEC 61010-2-201.
Dynamic value: Including ripple, e.g. as in the case of three-phase bridge power rectification
2)
Valid for the infeed bus of the modules and BaseUnits of motor starters only
3)
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
14.6 Insulation, protection class, degree of protection and rated voltage
.
2
3)
Technical specifications
Tolerance range
19.2 to 28.8 V DC
1)
18.5 to 30.2 V DC
2)
93 to 132 V AC
187 to 264 V AC
48 to 500 V AC
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