Specifications
7
Servo amplifier specifications
Servo amplifier model
MR-J3--RJ080W
20B 40B 60B 70B 100B 350B 500B
Voltage/frequency
(Note 1, 2)
3-phase 200 to 230VAC 50/60Hz
or
1-phase 200 to 230VAC 50/60Hz
3-phase 200 to 230VAC 50/60Hz
Permissible voltage
fluctuation
For 3-phase 200 to 230VAC: 3-phase 170 to 253VAC
For 1-phase 200 to 230VAC: 1-phase 170 to 253VAC
3-phase 170 to 253VAC
Main circuit
power supply
Permissible frequency
fluctuation
±5% maximum
Voltage/frequency 1-phase 200 to 230VAC 50/60Hz
Permissible voltage
fluctuation
1-phase 170 to 253VAC
Permissible frequency
fluctuation
±5% maximum
Control
circuit power
supply
Power
consumption
(W) 30 45
Interface power supply 24VDC±10% (required current capacity: 0.15A (Note 3))
Control system Sine-wave PWM control/current control system
Dynamic brake Built-in (Note 4, 5)
Safety features
Overcurrent shutdown, regeneration overvoltage shutdown,
overload shutdown (electronic thermal), direct drive motor overheat protection,
encoder fault protection, regeneration fault protection,
undervoltage/sudden power outage protection, overspeed protection, excess error protection,
magnetic pole detection protection, servo control error protection
Structure Natural-cooling, open (IP00) Fan-cooling, open (IP00)
Ambient temperature
(Note 6)
0 to 55°C (32 to 131°F) (non freezing), storage: -20 to 65°C (-4 to 149°F) (non freezing)
Ambient humidity 90% RH maximum (non condensing), storage: 90% RH maximum (non condensing)
Atmosphere Indoors (no direct sunlight); no corrosive gas, inflammable gas, oil mist or dust
Elevation 1000m or less above sea level
Environment
Vibration 5.9m/s
2
or less at 10 to 55Hz (directions of X, Y and Z axes)
Mass (kg [lb]) 0.8 (1.8) 1.0 (2.2) 1.0 (2.2) 1.4 (3.1) 1.4 (3.1) 2.3 (5.1) 4.6 (10)
Notes: 1. Rated output and speed of a direct drive motor are applicable when the servo amplifier, combined with the direct drive motor, is operated
within the specified power supply voltage and frequency. Torque drops when the power supply voltage is below the specified value.
2. For torque characteristics when combined with a direct drive motor, refer to the section "Direct drive motor torque characteristics" in this
catalog.
3. 0.15A is the value when all of the input/output points are used. The current capacity can be stepped down according to the number of
input/output points in use. Refer to "MR-J3-B SERVO AMPLIFIER INSTRUCTION MANUAL" for details.
4. When using the built-in dynamic brake, refer to "MR-J3-B-RJ080W INSTRUCTION MANUAL" for the permissible load inertia moment
ratio.
5. Special specification servo amplifiers without a dynamic brake are also available: MR-J3-B-RU080W. When using the servo amplifier
without a dynamic brake, the direct drive motor does not stop immediately at alarm occurrence or power failure. Take measures to ensure
safety in the entire system.
6. The following servo amplifiers can be mounted closely: MR-J3-20B-RJ080W, -40B-RJ080W, -60B-RJ080W, -70B-RJ080W, -100B-RJ080W
and -350B-RJ080W. In this case, operate them at the ambient temperature of 0 to 45°C (32 to 113°F) or at 75% or less of the effective load
ratio.
Peripheral equipment
z Electrical wires, circuit breakers, magnetic contactors (example of selection)
The following are example of wire sizes when 600V polyvinyl chloride insulated wires with a length of 30m are used.
Electrical wire size (mm
2
)
Servo amplifier model
Circuit breaker
Magnetic
contactor
(Note 3)
L1, L2, L3,
(Note 1)
L11, L21
U, V, W,
P, C
(Note 1)
MR-J3-20B-RJ080W 30A frame 5A
MR-J3-40B-RJ080W 30A frame 10A
MR-J3-60B-RJ080W
MR-J3-70B-RJ080W
MR-J3-100B-RJ080W
30A frame 15A
S-N10 2 (AWG14) 1.25 (AWG16)
MR-J3-350B-RJ080W 30A frame 30A S-N20 3.5 (AWG12) 3.5 (AWG12)
MR-J3-500B-RJ080W (Note 2) 50A frame 50A S-N35 5.5 (AWG10)
1.25 (AWG16)
5.5 (AWG10)
2 (AWG14)
Notes: 1. Connect a reactor or optional regeneration unit using 5m or shorter length electrical wire. For the electrical wire size suitable for the power
factor improvement DC reactor, refer to "MELSERVO-J3 catalog (L(NA)03017)".
2. When connecting the wires to the terminal screws, be sure to use the screws attached to the terminal blocks.
3. Be sure to use a magnetic contactor (MC) with operation delay time of 80ms or less. The operation delay time is the time interval between
current being applied to the coil until closure of contacts.
z Power factor improvement DC reactor (FR-BEL)
This reactor enables users to boost the servo amplifier’s power factor and reduce its power supply capacity.
Model (Note 1) Applicable servo amplifier Model (Note 1) Applicable servo amplifier
FR-BEL-0.4K MR-J3-20B-RJ080W FR-BEL-2.2K MR-J3-100B-RJ080W
FR-BEL-0.75K MR-J3-40B-RJ080W FR-BEL-7.5K MR-J3-350B-RJ080W
FR-BEL-1.5K
MR-J3-60B-RJ080W
MR-J3-70B-RJ080W
FR-BEL-11K MR-J3-500B-RJ080W
Notes: 1. For external dimensions and connections of the power factor improvement DC reactor, refer to "MELSERVO-J3 catalog (L(NA)03017)".