Installation of VACON® Option Boards vacon • 15
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2
2.1 Control cables
The control cables used must be at least 0.5mm
2
screened multicore cables. The maximum
terminal wire size is 2.5mm
2
for the relay terminals and 1.5 mm
2
for other terminals.
Find the tightening torques of the option board terminals in the table below.
2.1.1 Cable grounding
We recommend to ground the control cables in the manner presented above.
Strip the cable at such distance from the
terminal that you can fix it to the frame with the
grounding clamp.
Figure 10. Grounding of control cable
Table 2. Tightening torques of terminals
Terminal screw Tightening torque
Nm lb-in.
Relay and thermistor terminals
(screw M3)
0.5 4.5
Other terminals
(screw M2.6)
0.2 1.8
Table 3. Cable types required to meet standards
Cable type Level H, C Level L
Control cable 4 4
Level H =
EN 61800-3+A11, 1
st
environment, restricted distribution
EN 61000-6-4
Level L =
EN61800-3, 2
nd
environment
4 =
Screened cable equipped with compact low-impedance shield
(NNCABLES /Jamak, SAB/ÖZCuY-O or similar).
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