Information On Insulation Tests, Protection Class And Degree Of Protection; Test Voltages - Siemens Simatic M7-400 Reference Manual

General Technical Specifications
1.5 Information on Insulation Tests, Protection Class and
Degree of Protection

Test Voltages

Insulation resistance was demonstrated in routine testing with the following test
voltages in accordance with IEC 61131-2:
Table 1-16 Test Voltages
Circuits with Rated Voltage U
Protection Class
Safety class I to IEC 60536 (VDE 0106, Part 1). In other words, a connection is
required from the protective conductor to the power supply module.
Protection Against Ingress of Foreign Bodies and Water
Degree of protection IP 20 to IEC 60529. In other words, there is protection against
contact with standard probes.
There is no special protection against the ingress of water.
1-18
to Other Circuits or
e
Ground
≤ 50 V
0 V < U
e
≤ 100 V
50 V < U
e
≤ 150 V
100 V < U
e
≤ 300 V
150 V < U
e
S7-400, M7-400 Programmable Controllers Module Specifications
Test Voltage
350 V
700 V
1300 V
2200 V
A5E00069467-07