Control Unit Cabling; Control Cable Sizing - Honeywell SmartVFD HVAC MR4 User Manual

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6.1

Control unit cabling

The basic control unit connections are presented in Figure 49 below. The control board is
equipped with 22 fixed control I/O terminals and the relay board with 8 or 9. The relay board is
available in two different configurations (see Table 16 and 17). All signal descriptions are given
in Tables 15 to 17.
21 22 23
12 13 14 15 16 17 18 19 30
6.1.1

Control cable sizing

The control cables shall be at least 0.5 mm
imum terminal wire size is 2.5 mm
Find the tightening torques of the control and relay board terminals in Table 14 below.
Terminal screw
All I/O and relay terminals
(screw M3)
24 25 26
1 2 3 4
Basic control terminals
for the relay and other terminals.
2
Table 14. Control cable tightening torques
32 33
5 6 7 8 9 10 11
Figure 49.
screened multicore cables, see Table 7. The max-
2
Tightening torque
Nm
0.5
C
ONTROL UNIT
A B
lb-in.
4.5