1-6
1.4 Wiring between Inverter and Peripheral devices and notice
Caution
1. After turning OFF the main circuit power supply, do not touch the circuit components or change
any circuit components before the “CHARGE” lamps extinguished. (It indicates that there is still
some charge in the capacitor).
2. Never do wiring work or take apart the connectors in the inverter while the power is still on.
3. Never connect the inverter output U/T1, V/T2, W/T3 to the AC source.
4. Always connect the ground lead E to ground.
5. Never apply high voltage test directly to the components within the inverter. (The semiconductor
devices are vulnerable to high voltage shock.)
6. The CMOS IC on the control board is vulnerable to ESD. Do not try to touch the control board.
7. If Sn-03 is 7,9,11 (2-wire mode) or is 8,10,12 (3-wire mode), except parameter settings of Sn-01
and Sn-02, the other parameter settings will return to their initial settings at factory. If the
inverter is initially operated in 3-wire mode (Sn-03= 8,10,12), the motor will rotate in CCW
sense after setting changed to 2-wire mode. (Sn-03= 7,9,11). Be sure that the terminals 1 and 2
are OPEN so as not to harmful to personal or cause any potential damage to machines.
Caution
1.Determine the wire size for the main circuit so that the line voltage drop is within 2% of the rated
voltage. If there is the possibility of excessive voltage drop due to wire length, use a larger wire
(larger diameter) suitable to the required length
-3
10current(A)length(m) wire/km)(resistance wire3drop(V) voltageLine ×××Ω×=
2.If the length of the cable wire between the inverter and the motor exceeds 30m, use a lower carrier
frequency for PWM (adjust the parameter Cn-34). Refer to Page 3-21.
Caution
To ensure the safety of peripheral devices, it is strongly command to install a fast acting fuse in the
input side especially for higher output system. Regarding the specification of fast acting fuse, please
refer to P1-28.
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