Siemens ET 200S - Page 190

General Technical Specifications
7-10
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
7.4 Information on Insulation Testing, Safety Class, Degree of
Protection, and Rated Voltage of the ET 200S
Test Voltage
Insulation strength is demonstrated in the type test with the following test voltage in
accordance with IEC 61131-2:
Circuits with a Rated Voltage of U
e
to
Other Circuits or Ground
Test Voltage
< 50 V 500 VDC
< 150 V 2500 VDC
< 250 V 4000 VDC
Pollution Severity/Overvoltage Category in Accordance with IEC 61131
 Pollution severity 2
 Overvoltage category
– When U
N
= 120/ 230 VAC: III
– When U
N
= 24 VDC: II
Safety Class
Safety class I to IEC 60536
IP 20 Degree of Protection
IP 20 protection in accordance with IEC 60529 for all ET 200S modules, which
means:
 Protection against contact with standard test probes
 Protection against foreign bodies with a diameter greater than 12.5 mm
 No special protection against water