
SAFETY PRECAUTIONS
B–65152E/03
6
WARNING
D Do not short–circuit the motor power lines with ground or with each other.
Short–circuiting of the motor power lines presents the danger of electric shock, and may cause
the motor windings to burn out.
* Some motors require special connection, such as the switching of windings. For details, see
the Descriptions for each motor.
D Power lines must be mechanically secure.
Loose connections may cause a terminal to become disconnected, causing a ground fault or
short–circuit, and possibly resulting in electric shock.
D Ensure that no terminal is exposed, before attempting to turn on the power to the motor.
An exposed terminal presents the danger of electric shock if touched by the operator or any
conductive material.
D While the motor is operating, stand well clear. Do not attempt to touch the rotating parts
of the motor.
The rotating parts of the motor may trap the operator’s clothes or fingers. Also, before starting
the motor, ensure that anything which may be trapped or scattered by the motor, such as a key,
is not placed in the proximity of the motor.
D Turn off the power to the motor before attempting to touch the motor.
Touching the motor while the power is turned on is dangerous because voltage is present at the
terminals even if the motor is not operating. In particular, the power connection section presents
an extreme danger of electric shock. If the operator must touch the power connection section,
protective measures must be applied.
D After turning off the power to the motor, wait at least five minutes before touching the
terminals.
A high voltage remains at the power terminals for a while even after power–off. Therefore, do
not attempt to touch the terminals or connect the motor to another device before sufficient time
(at least five minutes) has elapsed after power–off. Otherwise, there is the danger of electric
shock or damage to the motor.
D Use only the specified amplifiers and parameters to drive the motor.
Driving the motor with other than the approved combinations of amplifier and parameters is
dangerous because the motor may perform an unexpected operation. There is also the danger
of the motor being damaged.