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System Configuration and Wiring
Precautions when wiring
Internal circuits retain high voltage for a certain period time after power is off. Wait at least for
15 minutes after power off before starting any wiring.
Main circuit
(1) If the power supply terminals (R/L1, S/L2 and T/L3) and motor terminals (U/T1,
V/T2 and W/T3) are connected in reverse, the inverter will be damaged. Be
sure not to connect these terminals in reverse.
(2) Do not ground the main circuit terminal.
(3) Do not short-circuit the motor terminals (U/T1, V/T2 and W/T3).
(4) The ground (E) terminal is the inverter’s frame ground terminal.
(5) To connect the main circuit terminal, be sure to use a crimp terminal with
insulation sheath.
(6) To run the inverter, use the no-fuse breaker (NFB) according to the standard
connection diagram.
Select a no-fuse breaker according to the motor ratings.
(7) Be sure to remove the phase advancing capacitor from an existing motor.
Control circuit
(1) When connecting a control circuit conductor, strip off a suitable length of insulation: too
long bare conductor will touch with another conductor; too short bare conductor will
easily pull off the connection. When connecting two more conductors together, twist
them before wiring or connecting.
(2) When using a bar terminal or solid conductor, select one having a diameter equal to 0.9
mm or less. Fastening screw may be damaged.
(3) Do not apply more than 24 VDC, 50 mA to the output terminals (COM1, O1, O2), or
apply voltage to terminal in reverse.
Do not apply 30 VAC, 2 A (or 30 VDC, 2 A) to the output terminals (COM2, NO and NC).
(4) Do not apply an external voltage to the input terminals (I1 to I6).
(5) Do not short-circuit the frequency setting power supply terminal (5 V) and the external
power supply terminal (12 V) with the control ground (G) terminal.
(6) To directly drive the relay by the output terminals (COM1, O1, O2), mount a flywheel diode
(FD).
(7) For connections to the control circuit, use twisted cables or shielded cables.
(8) The cable connected to the control circuit must be placed apart from a power cable.
(9) To tighten a cable, put a screwdriver on the terminal perpendicularly.
５
.
５㎜±１㎜
ＦＤ（１００Ｖ
１Ａ）
Ｒ
Ｙ
COM
1
0
1
/02
<Examples> Fuji Electric
ERA15-01
ERB12-01
Pay attention to polarity of diode.
