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Electrical connections
Earthing cables
Shielding
Pre-Fuse
Page 40 of 96
The earthing of a system satisfies protective and functional measures.
Please observe the following points:
Earthing cables should be as short as possible.
Avoid ground loops.
Use ground straps with a width of at least 10 mm.
In order to ensure trouble free operation of a system, cables with the largest
possible surface area (not cross section) are important. High frequency currents
do not flow through the entire cross section of the conductor, but predominantly
on the outer skin of a conductor.
Please observe the following points:
Always connect the shield over a large area using metal cable clips.
Avoid placing the shield on the ground with long wires.
ATTENTION
NOTE THE RATED CURRENT OF THE RELEASE CIRCUIT (K1) AND ADD IT TO
THE FOLLOWING VALUES. THE FOLLOWING VALUES ARE ONLY FOR THE EX P
CONTROL DEVICE.
If the dimensions are too small, the Ex p control unit may be destroyed.
Rated current (controller) + rated current release circuit (K1).
Variant
Rated current
control unit
Rated voltage
control unit
Response time
Switch-off current
Melt integral
01-37A2-7D0001_px_Manual_Exp-Control-Unit_20210923_0_en.docx
APEX, DC
>= 3,15 A
>= 63 V DC
Time lag
>= 1,5 kA
12... 34 A²s
Ex p Control unit
APEX, AC
>= 2 A
>= 277 V AC
Time lag
>= 1,5 kA
9,7... 14,7 A²s
APEX
px
Rev. 0
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