Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 3

For Safe Use
1. Electric shock prevention
Always turn the power OFF and wait 10 minutes or more until the charge lamp has turned OFF
before wiring or carrying out inspections. Using a tester, etc., always confirm that there is no
voltage between the P-N terminals before starting wiring or inspections. Failure to observe this
could lead to electric shocks.
Ground the spindle amplifier and spindle motor with Class 3 grounding or higher.
Wiring and inspections must always be carried out by a qualified technician.
Always install the spindle amplifier and spindle motor before wiring. Failure to observe this could
lead to electric shocks.
Do not touch the switches with wet hands. Failure to observe this could lead to electric shocks.
Do not damage, apply forcible stress, place heavy items or engage the cable. Failure to observe this
could lead to electric shocks.
2. Fire prevention
Install the spindle amplifier, spindle motor and regenerative resistor on noncombustible material.
Direct installation on combustible material or near combustible materials could lead to fires.
Shut off the power on the spindle amplifier side if a fault occurs in the spindle amplifier. Fires could
be caused if a large current continues to flow.
Shut off the power with an error signal when using the regenerative resistor. The regenerative
resistor could abnormally overheat and cause a fire due to a fault in the regenerative transistor, etc.
3. Injury prevention
Do not apply a voltage other than that specified in the Specifications or Instruction Manual on each
terminal. Failure to observe this item could lead to ruptures or damage, etc.
Do not mistake the terminal connections. Failure to observe this item could lead to ruptures or
damage, etc.
Do not mistake the DC voltage polarity (+, –). Failure to observe this item could lead to ruptures or
damage, etc.
Do not touch the spindle amplifier fins, regenerative resistor or spindle motor, etc., while the power is
turned ON or immediately after turning the power OFF. Some parts are heated to high temperatures,
and touching these could lead to burns.
DANGER
!
CAUTION
CAUTION