Mitsubishi Electric C80 series Maintenance Manual page 12

Following the UN recommendations, battery units and batteries should be transported based on the inter-
national regulations such as those determined by International Civil Aviation Organization (ICAO), Interna-
tional Air Transport Association (IATA), International Maritime Organization (IMO) and U.S. Department of
Transportation (DOT).
Due to ventilation problems, do not install the base units vertically or horizontally when C80 is mounted on
a board, etc.
Install the basic base unit on a flat surface. Unevenness or warping of the surface can apply undue force to
printed circuit boards and lead to operation failures.
Avoid fitting basic unit in proximity to vibration sources such as large electromagnetic contractors and no-
fuse circuit breakers; fit the unit on a separate panel or at a distance.
To limit the effects of reflected noise and heat, leave 100mm or more clearance to instruments fitted in front
of CNC CPU (on the rear of the door). Similarly, leave 50mm or more clearance between instruments and
the left and right sides of the basic base unit.
(3) Items related to wiring
Correctly wire this product. Failure to observe this could result in motor runaway, etc.
Incorrect connections could cause devices to damage. Connect the cables to designated connectors.
Do not install a phase advancing capacitor, surge absorber or radio noise filter on the output side of the
drive unit.
Correctly connect the output side (terminal U, V, W). The motor will not run properly if incorrectly connect-
ed.
Always install an AC reactor per each power supply unit.
Always install an appropriate breaker per each power supply unit. A breaker cannot be shared for multiple
power supply units.
Do not directly connect a commercial power supply to the motor. Failure to observe this could result in
faults.
When using an inductive load such as relays, always connect a diode in parallel to the load as a noise
countermeasure.
When using a capacitive load such as a lamp, always connect a protective resistor serially to the load to
suppress rush currents.
Do not mistake the direction of the surge absorption diode to be installed on the DC relay for the control
output signal. If mistaken, the signal will not be output due to fault in the drive unit, and consequently the
protective circuit, such as emergency stop, could be disabled.
Drive unit
COM
(24VDC)
Control
output
signal
Do not connect or disconnect the connection cables between each unit while the power is ON.
Do not connect or disconnect the PCBs while the power is ON.
Do not pull the cables when connecting/disconnecting them.
Securely tighten the cable connector fixing screw or fixing mechanism. The motor could come off during
operation if insecurely fixed.
Always treat the shield cables indicated in the Connection Manual with grounding measures such as cable
clamps.
Separate the signal wire from the drive line or power line when wiring.
Drive unit
COM
(24VDC)
Control
output
RA
signal
CAUTION
CAUTION
RA