3
Warning
[Wiring]
Be sure to connect a ground wire.
Otherwise, electric shock or a fire may occur.
Electrical engineering technicians should connect wires.
Otherwise, electric shock or a fire may occur.
Be sure to install VF66B (DC motor drive) before wiring.
Otherwise, electric shock or a fire may occur.
For ground fault protection, connect the leakage guard relay or ground fault interrupter exclusive for VF66B (DC
motor drive) to the inputs (R/L1, S/L2, T/L3) of VF66B (DC motor drive).
Otherwise, electric shock or a fire may occur.
Warning
[Wiring]
Do not connect the alternating-current power supply to the output terminals (P/N).
Otherwise, injury or a fire may occur.
Check that the rated voltage of the product and the voltage of the alternating-current power supply match with
each other.
Otherwise, injury or a fire may occur.
Do not directly connect a resistor between direct-current terminals
1/
2 and
or
1 and
2.
Otherwise, a fire may occur.
Warning
[Operation]
Be sure to install the front cover before turning on the input power. Do not remove the front cover during
energization.
Otherwise, it can result in a risk of electric shock.
Do not use the switches with wet hands.
Otherwise, it can result in a risk of electric shock.
Do not touch the VF66B (DC motor drive) terminals while VF66B (DC motor drive) is energized, even during
stop.
Otherwise, it can result in a risk of electric shock.
Warning
[Operation]
The stop button is available only when functions have been set. Provide an emergency stop button separately.
Otherwise, you may be injured.
When alarm reset is performed with operation signals input, VF66B (DC motor drive) suddenly restarts. Check
that signals are turned off, and then perform alarm reset.
Otherwise, you may be injured.
Caution
[Operation]
Do not touch a heat sink and a discharge resistor because they reach high temperatures.
Otherwise, you may get burned.
You can set a wide range of operation from high speed to low speed with VF66B (DC motor drive). Before
operation, check the permitted range of the motor and machinery sufficiently.
Otherwise, you may be injured.
Provide a holding brake separately if necessary.
Otherwise, you may be injured.
