Chapter 3 Signals And Wiring - Mitsubishi Electric MR-J5 Series User Manual

3
SIGNALS AND WIRING
Precautions
• When using a linear servo motor, replace the wording of the sentence as follows.
Load to motor inertia ratio  Load to motor mass ratio
Torque  Thrust
• Insulate the conductive parts of the terminals.
• Turn off the power and wait for 15 minutes or more until the charge light of the servo amplifier turns off. Checking the
voltage between P+ and N- using the tester, etc. is recommended.
• If using a regenerative resistor, configure a circuit that shuts off the main circuit power supply with an alarm signal because
abnormal overheating of the regenerative resistor may cause smoke and fire.
• To prevent failure and malfunction, only the power supply/signal specified in the user's manual should be connected to a
corresponding terminal.
• To prevent unexpected operation of the servo motor, wire the equipment correctly and securely.
• Make sure to connect the cables and connectors by using the fixing screws and the locking mechanism. Otherwise, the
cables and connectors may be disconnected during operation.
• Unless stated otherwise, all connection diagrams in this user's manual are sink interface diagrams.
• Install a surge absorbing diode in the correct direction. Otherwise, the amplifier may malfunction and not output signals,
disabling protective circuits such as the emergency stop.
Servo amplifier
24 V DC
DOCOM
Control output
signal
For sink output interface
• When the wires are not tightened enough to the terminal block, the wires or terminal block may generate heat because of
the poor contact. Be sure to tighten the wires with specified torque.
• Connecting a servo motor of the wrong axis to the power outputs (U/V/W) or CN2 of the servo amplifier may cause a
malfunction.
• Make sure that no operation signal is being input to the servo amplifier before resetting an alarm and releasing the
emergency stop. Otherwise, unexpected operation may occur.
• If the power supply is shut off by a molded-case circuit breaker or a fuse, remove the cause and secure safety before
switching the power on.
• Install the servo amplifier according to the EMC guidelines because electromagnetic interference may affect the electronic
equipment used near the servo amplifier.
• To prevent an electric shock or a fire, do not disassemble, repair, or modify the product. Disassembled, repaired, and/or
modified products are not covered under warranty.
• Before wiring, switch operation, or others, eliminate static electricity.
Servo amplifier
DOCOM
Control output
RA
signal
For source output interface
24 V DC
RA
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