General technical data
10.5 Specifications for insulation tests, protection class, degree of protection, and rated voltage
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
247
10.5
Specifications for insulation tests, protection class, degree of
protection, and rated voltage
Test voltage
The proof of dielectric strength is provided in a type test with the following test voltage
according to IEC 61131-2:
Circuits with rated voltage V
e
against other circuits or ground.
Test voltage
< 50 V
500 V DC
< 150 V
2500 V DC
< 250 V
4000 V DC
Pollution degree/overvoltage category according to IEC 61131-2
●
Pollution degree 2
●
Overvoltage category
–
At V
r
= 24 V DC: II
Degree of protection IP65
Degree of protection according to IEC 60529
●
Protection against the ingress of dust and full touch protection
●
Water projected by a nozzle against the enclosure from any direction shall have no
harmful effect.
Degrees of protection IP66 and IP67
Degree of protection according to IEC 60529
●
Protection against the ingress of dust and full touch protection
●
IP66: Water from heavy seas or water projected in powerful jets shall not enter the
enclosure in harmful quantities.
●
IP67: Protection against water when enclosure is immersed at specified pressures over a
specified time period (water must not enter the enclosure in any harmful amount)
Rated voltage for operation
The ET 200pro distributed I/O system operates at the following rated voltage and
corresponding tolerance.
Rated voltage
Tolerance range
24 V DC
20.4 V DC to 28.8 V DC