UM EN AXL E SYS INST
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PHOENIX CONTACT 8395_en_03
4.1.2 Interference suppression measures
Phoenix Contact recommends wiring relay coils or motor coils to an RC element in order to
protect the devices against interference. Depending on the application, the delay time of the
relay can be increased by approximately 1 ms.
Figure 4-2 Relay coil with RC element
The following values are recommended for the purpose of dimensioning the RC element:
R = 100 to 200 ; C = 220 nF to 470 nF.
4.1.3 Grounding concept
Axioline E devices operate in the low-level signal voltage range. In the case of low-level sig-
nal devices, interference is discharged via functional earth ground (FE). Functional earth
ground (FE) is only used to discharge interference. It does not provide shock protection for
people. Functional earth grounding is crucial for interference-free operation!
The Axioline E devices are designed to be screwed onto on a flat mounting surface.
Axioline E master Ground the plastic master by means of the mounting screws of the fixing clips,
see page 30.
Ground the metal master by means of the mounting screws of the fixing clips or the mount-
ing plate or the DIN rail, see page 31.
Axioline E IO-Link
digital input and output
device
Implement the FE connection via the grounding lug in order to ensure noise immunity.
Axioline E
IO-Link/analog converter
In environments with high levels of interference, in particular, Phoenix Contact recommends
connecting the converter to an appropriate functional earth ground point using an M4 screw,
see page 50.
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