Rockwell Automation Publication 1606-RM104A-EN-P - July 2020
17
Dielectric Strength
The output voltage is floating and has no ohmic connection to the ground.
The output is insulated to the input by a double or reinforced insulation.
The manufacturer constructs type and routine tests. Field tests may be
conducted in the field using the appropriate test equipment, which applies the
voltage with a slow ramp (2 s up and 2 s down). Connect all input-terminals
together, and all output poles before conducting the test. When testing, set the
cutoff current settings to the value in the table below.
We recommend that either the + pole or the – pole shall be connected to the
protective earth system. This helps to avoid situations in which a load starts
unexpectedly or cannot be switched off when unnoticed earth faults occur.
Figure 20 - Dielectric strength
(1) When testing input to DC OK, ensure that the maximal voltage between DC OK and the
output is not exceeded (column D). We recommend connecting DC OK pins and the output
pins together when performing the test.
Test
Time
A
B
C
D
Type test
60 s
2500V AC
3000V AC
500V AC
500V AC
Routine test
5 s
2500V AC
2500V AC
500V AC
500V AC
Field test
5 s
2000V AC
2000V AC
500V AC
500V AC
Field test cut off
current settings
—
> 10 mA
> 10 mA
> 20 mA
> 1 mA
A
D
C
B
B
(1)
N
L
Input
DC-ok
Earth, PE
Output
-
+