Siemens SIMATIC ET 200L Manual page 54

General Technical Data
6.5 Details of Insulation Testing, Safety Class, and Degree of Protection
Test Voltage Insulation strength is demonstrated in the routine test with the following test
voltage in accordance with IEC 1131, Part 2:
Circuits with a Rated Voltage U
Safety Class Safety class II in accordance with IEC 536 (VDE 0106, Part 1) – that is, con-
nection to a protective conductor is not necessary.
Protection Against
IP 20 degree of protection in accordance with IEC 529 – that is, protection
Foreign Matter and against contact with standard test fingers.
Water
Furthermore, it is protected against foreign matter having a diameter greater
than 12.5 mm.
No special protection against water.
6-8
to Other
e
Circuits or to Ground
v50 V
0 V < U
e
Test Voltage
500 VDC
ET 200L Distributed I/O Device
EWA-4NEB 780600902-05