2 Safety Instructions
14 Rev. 03/2019
Occurrence of ground loops
The devices shown in the following image do not feature the possibility to
connect the earth potential and the negative pole of the power supply
separated from each other. How ground loops are created.
A ground loop is a ground connection of an electric wiring assembly that is
closed as a loop. Due to impedance (resistance R > ) of the loop,
low-frequency interference currents can lead to an unwanted voltage drop
in the signal path.
Device 1 Device 2
Ground loop
2.4 Special Safety Instructions for the Device
Explosion hazard!
Never open the device (e.g. by removing covers or the service screw). If the
system is located in a hazardous area, there is a risk of explosion.
Explosion hazard!
The replacement of parts or assemblies can impair compliance with CSA
Class I, Division 2 (Group C, D), T4.
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