Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 416

15. MR-J3W-0303BN6 SERVO AMPLIFIER
15.3.1 Input power supply circuit
CAUTION
Wire the power supply/main circuit so that the main circuit power supply is shut off and the servo-on command
turned off as soon as an alarm occurring, an enabled servo forced stop, or an enabled controller forced stop. A
circuit protector must be used with the input cables of the power supply.
POINT
This section does not include the following items. For details of the items, refer to
each section of the detailed description field.
Interface
Treatment of cable shield external conductor
SSCNET cable connection
Control axis selection
Always connect a circuit protector between the power supply and power supply
voltage input terminals (24, 0, and PM) of the servo amplifier, in order to configure a
circuit that shuts down the power supply on the side of the servo amplifier's power
supply. If a circuit protector is not connected, continuous flow of a large current may
cause a fire when the servo amplifier malfunctions.
When alarms are occurring in both axes of A and B, shut off the main circuit power
supply. Not doing so may cause a fire when a regenerative transistor malfunctions or
the like may overheat the regenerative resistor.
Check the servo amplifier model, and then input proper voltage to the servo amplifier
power supply. If input voltage exceeds the upper limit, the servo amplifier will break
down.
Connecting a servo motor for different axis to the CNP2A or CNP2B connector may
cause a malfunction.
POINT
Even if alarm has occurred, do not switch off the control circuit power supply. When
the control circuit power supply has been switched off, optical module does not
operate, and optical transmission of SSCNET
Therefore, the next axis servo amplifier displays "AA" at the indicator and turns into
base circuit shut-off. The servo motor will stop.
Item
15 - 11
Detailed
explanation
Section 3.7
Section 3.8
Section 3.9
Section 3.13
communication is interrupted.