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3.6.5 Cable length between inverter and motor
• If the cable between the inverter and motor is long and the carrier
frequency is high, high-frequency current is leaked from the cable and
peripheral devices. This may damage the inverter and peripheral
devices.
• Adjust the carrier frequency as shown in table below.
• To change the setting related to the carrier frequency, refer to the
parameter setting of C1-01.
Table 3.8 Cable length.vs. carrier frequency
Cable length
30m max.
50m max.
Less than
Less than
Carrier frequency
10kHz
8kHz
C1.01
10
8
3.Wiring
3-17
More than
100m max.
100m
Less than
Less than
4kHz
1kHz
4
1
MOSCON-E7 User's Manual
3-18
3.7 Precautions when wiring
3.7.1 Control circuit wiring precautions
•
Separate the control circuit wiring (terminals 1 to 11) from main circuit
wiring (terminals P/B, N, R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, +1,
and +2) and other high-power lines.
• Separate the control circuit terminals A1, B1 and C1 (contact outputs)
from wiring for control circuit terminals (terminals 1 to 11).
• Use twist-pair or shielded twisted-pair to prevent operating faults due
to noise. The maximum cable length is 50cm.
Shield sheath Armor
½ Ç µ å Ç Ç º Î
¿ Ü Ç Ç
Connect to ground
Insulate with tape
terminal
Figure 3.10 Ends of twisted-pair cables
3.7.2 Main circuit input/output wiring
• Do not connect the main circuit power to output terminal U/T1,
V/T2, and W/T3.
• When the output terminals U/T1, V/T2, and W/T3 and motor
terminals U, V, and W are connected, the forward rotation command
causes the motor to rotate counter-clockwise from the view of load
side. To change the direction, switch any of two wires of U, V and W.
Figure 3.11 Direction of motor's rotation
¿ © ± â
´ Â
¿ ¬ ° á Ç Ï
Á ö
¾ Ê ´ Â ´ Ù
Do not connect here
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