Operating instructions

Planning application
3.3 MP 377 PRO
MP 377, MP 377 PRO (WinCC flexible)
52 Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
3.3.3 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 VDC
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
The following degree of protection applies to the HMI device:
Device side Degree of protection in accordance with IEC 60529
all sides
• IP65
• Enclosure Type 12 (indoor use only)
• Enclosure Type 4X/Type 12 (indoor use only)
3.3.4 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%)