5
vacon • 49
Control unit
5.1
Control unit cabling
The principal terminal block placement is shown in Figure 27 below. The control board is
equipped with 23 fixed control I/O terminals. Additionally, the terminals for the Safe Torque Off
(STO) function (see chapter 9) can be seen in the picture below. All signal descriptions are also
given in Table 24.
Figure 27. Control terminals.
5.1.1
Control cable sizing
The control cables shall be at least 0.14 mm
2
screened multi core cables, see Table 23. The
maximum terminal wire size for the I/O terminals is 1.5 mm
2
.
Find the tightening torques of the I/O (control and relays) and STO terminals in the Table below.
Terminal screw
Tightening torque
Nm
lbs-in.
I/O terminals and STO termi-
nals (screw M2)
0.22 min
0.25 max
1.95 min
2.21 max
Table 23. Control cable tightening torques.
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