Operating instructions

Planning application
3.2 MP 377 mounting devices
MP 377, MP 377 PRO (WinCC flexible)
50 Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
3.2.3 Information on insulation tests, protection class and degree of protection
Test voltages
Insulation strength is demonstrated in the type test with the following test voltages in
accordance with IEC 61131-2:
Circuits with a nominal voltage of U
e
to
other circuits or ground
Test voltage
< 50 V 500 V DC
Protection class
Protection Class I in accordance with IEC 60536, i.e. PE/ground terminal to profile rail
required!
Protection against foreign objects and water
Degree of protection in accordance with
IEC 60529
Explanation
Front When mounted:
• IP65
• Enclosure Type 4X/Type 12 (indoor use only)
Rear panel IP20
Touch protection test with standard test probes. There is
no protection against ingress by water.
The degree of protection at the front can only be guaranteed if the mounting seal is installed
flush to the mounting cutout.
3.2.4 Rated voltages
The table below shows the rated voltage and the corresponding tolerance range.
Rated voltage Tolerance range
+24 VDC 19.2 to 28.8 V (+/–20%)