Control Unit Cabling; Selection Of The Control Cables - Danfoss VACON NXP FI9 Operating Manual

Operating Guide | VACON® NXI Inverters FI9-FI14
If the AC drive is supplied with external 24 V DC power, use a diode in terminal #6 (or #12) to prevent the current to flow in
opposite direction. Put a 1 A fuse in 24 V DC line for each AC drive. The maximum current consumption of each drive is 1 A from
the external supply.
-G1
Ext +24VDC
Power Supply
-F1
Class CC
Illustration 15: Parallel Connection of 24 V Inputs with Many AC Drives
The control unit I/O ground is not isolated from the chassis ground/protective earth. In the installation, consider the potential
differences between the grounding points. We recommend using galvanic isolation in the I/O and 24 V circuitry.

7.3 Control Unit Cabling

7.3.1 Selection of the Control Cables

The control cables must be a minimum of 0.5 mm
terminal wires must be a maximum of 2.5 mm
Table 9: Tightening Torques of the Control Cables
The terminal
Relay and thermistor terminals
Other terminals
Danfoss A/S © 2019.11
PE/GND
-F2 -F3
1A 1A
gG/ gG/
Class CC Class CC
-Q1 -Q2
3A 3A
#6 #7 #6 #7
2
(20 AWG) shielded multicore cables. See more on the cable types in
2
(14 AWG) for the terminals of the relay board and 1.5 mm
The terminal screw
M3
M2.6
N O T I C E
-F4 -F5
1A 1A
gG/ gG/ gG/
Class CC Class CC
-Q3 -Q4
3A 3A
#6 #7 #6 #7
N O T I C E
The tightening torque in Nm (lb-in.)
0.5
(4.5)
0.2
(1.8)
-F6 -F7
1A 1A
gG/
Class CC
-Q5 -Q6
3A 3A
#6 #7 #6 #7
2
(16 AWG) for other terminals.
AQ304441431479en-000101 / DPD00909| 43
Control Unit
table 7. The