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