1. Description of easyE4 control relay
1.10 Engineering
1.10.4 Analog signals
DANGER
Analog signals are more sensitive to interference than digital signals,
which is why the signal cables should be carefully routed and con-
nected.
An incorrect connection can lead to unwanted switching states.
The following measures must be adhered to in order to prevent any deviations in ana-
log values.
Tips for analog signals
Use shielded cables.
Keep the signal wires as short as possible.
→ Section "Length of Signal input cables", page 45
In the case of short cable lengths, terminate the signal cables' shield to the 0 V
terminal on both sides across the entire area.
In the case of longer signal cables, the shield should only be terminated on one
end, i.e., on the side of the EASY-E4-... devices.
Otherwise compensation currents between both grounding points may flow,
leading to the interference of analog signals.
 Lay signal cables separately from heavy current cables.
 Connect inductive loads that you are switching via the outputs of the EASY-E4-...
base devices to a separate power supply or use a suppressor circuit for motors
and valves.
If loads from motors, solenoid valves or contactors are operated with the same
power feed as EASY-E4-... devices, switching may give rise to interference on
the analog input signals.
 Make sure that the reference potential is galvanically connected.
50
easyE402/24 MN050009ENEaton.com
To Next Page
Loading...
Need help?
General