Siemens SIMATIC ET 200AL System Manual page 110

Technical specifications
10.5 Details on insulation, protection class, degree of protection and rated voltage
10.5 Details on insulation, protection class, degree of protection and
rated voltage
Insulation
The insulation is designed in compliance with the requirements of IEC 61010-2-201.
Note
Galvanic isolation with 707 V DC (Type Test) is tested for modules with 24 V DC supply
voltage (SELV/PELV).
Pollution class according to IEC 61010-2-201
• Protection class III
Severity for voltage interruption
The I/O devices of the distributed I/O system ET 200AL meet the severity class PS1 for voltage
interruption (5 ms).
Pollution degree / overvoltage category pursuant to IEC 61010-2-201
• Pollution degree: 3
• Overvoltage category: II
Degree of protection IP65 and IP67
Degree of protection IP65 and IP67 according to IEC 60529 for all modules of the ET 200AL
distributed I/O system:
• 1. Code number: Dust-proof and complete protection from contact
• 2. Code number: Protection from water
– IP65: Protection from water jets from any angle
– IP67: Protection against temporary submersion
Rated voltage for operation
The following table shows the nominal voltage and the corresponding tolerance with which
the ET 200AL distributed I/O system operates.
Table 10- 12 Rated voltage for operation
Rated voltage (SELV/PELV)
24 V DC
108
(The water may not have any damaging effect)
(The water must not enter the enclosure in harmful quantities)
Tolerance range
20.4 V to 28.8 V DC
System Manual, 08/2021, A5E31861578-AJ
Distributed I/O system