7-7-3 Wiring and cautionary points
A. Main circuit
1. Don’t connect the cables of the power supply side to the
U, V and W output terminals for the motor.
2. Don’t connect any electromagnetic contactor between
the driver and motor.
3. Don’t put the advance phase capacitor between the
driver and motor.
4. Put MCCB in the input power supply.
B. Control signal circuit
1. Separate the power cables of main circuit etc. from the
control cables of the sequence and analog signals by
passing the cables through the different ducts.
2. Use twisted pair shielded wire for control signal and con-
nect the shield to earth terminal at on end, COMMON
terminal of control board. Leave the other end of shield-
ing open.
3. Avoid common Ground leads between high and low level
voltage equipment.
C. Grounding
1. Be sure ground both the driver and motor.
2. Keep grounded leads as short as possible.
3. Shield cables used to protect low-level signal leads
should grounded at on end point.
4. Provide class 3 grounding (0.1 or less) for a terminal.
5. When grounding several drivers, make connections as
shown below, no loop is produced as shown in FIG ”a”,
FIG ”b”.
(a) (b) (c)
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