Configuration Including Peripheral Equipment - Mitsubishi Electric Melservo-J4 MR-J4-DU*B4-RJ100 Series Instruction Manual

1.6

Configuration including peripheral equipment

The diagram shows a system that drives a servo motor with four MR-J4-DU_B4-RJ100 drive units and four MR-CV55K4_
power regeneration converter units connected.
Servo system
controller
*8
SSCNET III/H
Encoder master servo amplifier
*3
Power
regeneration Drive
converter unit 1 unit 1
*7
Magnetic
contactor
(MC)
AC reactor *6
(MR-AL-55K4-L)
Molded-case
circuit breaker
(MCCB)
Power supply
*2, *5
3-phase
380 V AC to
480 V AC
Dynamic brake
(DBU-P55K-4-B)
*1 Connect the grounding wire of the servo motor to only the first drive unit. If the grounding wire of the servo motor is connected to two or
more drive units, the circulating current may pass through the grounding wire depending on wiring conditions. When connecting
grounding wires to two or more drive units, be sure to twist the wires of the drive unit power outputs (U/V/W) for safety reasons.
*2 For the power supply, one molded-case circuit breaker, one AC reactor (MR-AL-55K4-L), and one magnetic contactor are required for
each power regeneration converter unit.
*3 Since the system is connected via SSCNET III/H, use a servo amplifier near the Motion controller as an encoder master servo amplifier,
and use the remaining servo amplifiers as encoder slave servo amplifiers. Connect the encoder master servo amplifier and slave servo
amplifiers in series to the same SSCNET III/H system.
*4 The encoder cables between drive units should be within 5 m.
*5 Supply power to all the servo amplifiers (power regeneration converter units and drive units) from the same power source. If power is
supplied from different power sources, a difference may be generated between outputs of the encoder master servo amplifier and
encoder slave servo amplifiers. This may cause the servo motor to operate unpredictably.
*6 Even if an AC reactor is installed on the power regeneration converter unit, the functions operate normally.
*7 Switch on the control circuit power supplies of all the servo amplifiers (power regeneration converter units and drive units)
simultaneously.
*8 Stop all the drive units with the emergency stop of the controller if an alarm occurs.
Encoder slave
servo amplifier 1 *3
Power
regeneration Drive
converter unit 2 unit 2
*4
*7
Magnetic
contactor
(MC)
AC reactor *6
(MR-AL-55K4-L)
Molded-case
circuit breaker
(MCCB)
Power supply
*2, *5
3-phase
380 V AC to
480 V AC
Dynamic brake
(DBU-P55K-4-B)
*1
Servo motor
Encoder slave
servo amplifier 2 *3
Power
regeneration Drive
converter unit 3 unit 3
*4
*7
Magnetic
contactor
(MC)
AC reactor *6
(MR-AL-55K4-L)
Molded-case
circuit breaker
(MCCB)
Power supply
*2, *5
3-phase
380 V AC to
480 V AC
Dynamic brake
(DBU-P55K-4-B)
1 FUNCTIONS AND CONFIGURATION
1.6 Configuration including peripheral equipment
Fit a cap
(standard accessory)
on the unused connector.
Encoder slave
servo amplifier 3 *3
Power
regeneration Drive
converter unit 4 unit 4
*4
*7
Magnetic
contactor
(MC)
AC reactor *6
(MR-AL-55K4-L)
Molded-case
circuit breaker
(MCCB)
Power supply
*2, *5
3-phase
380 V AC to
480 V AC
Dynamic brake
(DBU-P55K-4-B)
1
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