5
vacon • 33
Control unit
5.3
Control unit cabling
The principal terminal block placement is shown in Figure 22 below. The control board is
equipped with 18 fixed control I/O terminals and the relay board with 5. Additionally, the termi-
nals for the Safe Torque Off (STO) function (see chapter 9) can be seen in the picture below. All
signal descriptions are given in Table 13 too.
Figure 22. Control terminals.
5.3.1
Control cable sizing
The control cables shall be at least 0.14 mm
2
screened multi core cables, see Table . The max-
imum 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
lb-in.
I/O terminals and STO termi-
nals (screw M2)
0.22 min
0.25 max
1.94 min
2.21 max
Table 12. Control cable tightening torques.
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