Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual page 3

1. To prevent electric shock, note the following:
Before wiring or inspection, turn off the power and wait for 15 minutes or more (20 minutes or for drive
unit 30kW or more) until the charge lamp turns off. Then, confirm that the voltage between P( ) and
N( ) (L and L
electric shock may occur. In addition, always confirm from the front of the servo amplifier, whether the
charge lamp is off or not.
Connect the converter unit, servo amplifier (drive unit) and servo motor to ground.
Any person who is involved in wiring and inspection should be fully competent to do the work.
Do not attempt to wire the converter unit, servo amplifier (drive unit) and servo motor until they have been
installed. Otherwise, you may get an electric shock.
Operate the switches with dry hand to prevent an electric shock.
The cables should not be damaged, stressed loaded, or pinched. Otherwise, you may get an electric
shock.
During power-on or operation, do not open the front cover. You may get an electric shock.
Do not operate the converter unit and servo amplifier (drive unit) with the front cover removed. High-
voltage terminals and charging area are exposed and you may get an electric shock.
Except for wiring or periodic inspection, do not remove the front cover even if the power is off. The servo
amplifier (drive unit) is charged and you may get an electric shock.
2. To prevent fire, note the following:
Install the converter unit, servo amplifier (drive unit), servo motor and regenerative resistor on
incombustible material. Installing them directly or close to combustibles will lead to a fire.
Always connect a magnetic contactor (MC) between the main circuit power supply and L1, L2, and L3 of
the converter unit, servo amplifier, and configure the wiring to be able to shut down the power supply on
the side of the converter unit, servo amplifier's power supply. If a magnetic contactor (MC) is not
connected, continuous flow of a large current may cause a fire when the converter unit, servo amplifier
(drive unit) malfunctions.
When a regenerative resistor is used, use an alarm signal to switch main power off. Otherwise, a
regenerative transistor fault or the like may overheat the regenerative resistor, causing a fire.
3. To prevent injury, note the follow
Only the voltage specified in the instruction manual should be applied to each terminal, Otherwise, a
burst, damage, etc. may occur.
Connect the terminals correctly to prevent a burst, damage, etc.
Ensure that polarity ( , ) is correct. Otherwise, a burst, damage, etc. may occur.
Take safety measures, e.g. provide covers, to prevent accidental contact of hands and parts (cables, etc.)
with the converter unit and servo amplifier (drive unit) heat sink, regenerative resistor, servo motor, etc.
since they may be hot while power is on or for some time after power-off. Their temperatures may be high
and you may get burnt or a parts may damaged.
During operation, never touch the rotating parts of the servo motor. Doing so can cause injury.
for drive unit 30kW or more) is safe with a voltage tester and others. Otherwise, an
WARNING
CAUTION
CAUTION
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