Electrical connections
Ex p Control unit
APEX
mv
Page 30 of 80
01-37A2-7D0005_MV_Manual_Exp-Control-Unit_2021005_0_en.docx
Rev. 0
6.1.2.2
Earthing cables
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.
6.1.2.3
Shielding
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.
Pre-Fuse
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
APEX, DC
APEX, AC
Rated current control unit
>= 3,15 A
>= 2 A
Rated voltage control unit
>= 63 V DC
>= 277 V AC
Response time
Time lag
Time lag
Switch-off current
>= 1,5 kA
>= 1,5 kA
Melt integral
12… 34 A²s
9,7… 14,7 A²s
