Manufacturer: Mitsubishi Electric
Product No.: MR-J4-20B
Country of origin:United States
Product Type: Servo Amplifiers
Payment: T/T, Western Union
Weight: 800g
Dimensions: 220 mm x 180 mm x 100 mm
Shipping port: Xiamen
Warranty: 12 months
Engineered for high-precision motion control, the Mitsubishi Electric MR-J4-20B servo amplifier delivers advanced positioning and synchronization capabilities within the MELSERVO-J4 platform. Utilizing high-speed SSCNET III/H communication, this 0.2 kW amplifier processes synchronous commands at up to 0.222 ms cycles, facilitating precise closed-loop operations. A built-in Safe Torque Off (STO) function provides safety features conforming to EN ISO 13849-1 Category 3 PL e and IEC 61508 SIL 3. Configured with advanced auto-tuning algorithms and multi-stage vibration suppression filters, this amplifier compensates for mechanical resonance in highly dynamic automated installations.
| Parameter | Value / Specification |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Number | MR-J4-20B |
| Series | MELSERVO-J4 |
| Motor Rated Output | 0.2 kW (200 W) |
| Output Rated Voltage | Three-phase AC 170 V |
| Output Rated Current | 1.5 A |
| Main Circuit Power Supply | Three-phase or single-phase AC 200 V to 240 V, 50 Hz / 60 Hz |
| Control Circuit Power Supply | Single-phase AC 200 V to 240 V, 50 Hz / 60 Hz |
| Control Method | Sinusoidal wave PWM control and current control system |
| Built-in Regenerative Resistor | 10 W |
| SSCNET III/H Cycle Times | 0.222 ms, 0.444 ms, 0.888 ms |
| Safety Standards | EN ISO 13849-1 Cat 3 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3 |
| Protection Rating | IP20 (Open, self-cooling structure) |
| Operating Temperature | 0 to 55 degC (non-freezing) |
| Operating Humidity | 90% RH or less (non-condensing) |
| Product Net Weight | 0.8 kg |
| Shipping Weight (Calculated) | 2.0 kg |
| Package Dimensions (Calculated) | 220 mm x 180 mm x 100 mm |
| Connector / Terminal Block | Function / Circuit Assignment |
|---|---|
| L1, L2, L3 | Main power supply input terminals (Single-phase hookup requires L1 and L2 connection) |
| L11, L21 | Control circuit power supply input terminals (Single-phase 200-240 VAC) |
| U, V, W | Servo motor power output terminals (Match phases directly to motor power cable) |
| CN1A / CN1B | SSCNET III/H optical fiber connector ports for bus network cabling |
| CN2 | Servo motor encoder interface connector |
| CN3 | I/O signal connector (Digital inputs/outputs and analog monitors) |
| CN8 | Safe Torque Off (STO) safety signal input connection |
The MR-J4-20B functions as a direct drop-in replacement for legacy MR-J3-20B amplifiers. While it contains J3 compatibility modes, parameters must be initialized and downloaded via MR Configurator2 to map features over legacy network structures correctly. Be aware that running in J3 mode disables certain MR-J4 diagnostics, such as the high-resolution encoder response profiles.
Operating the unit under a single-phase AC input increases current load on the internal rectifier bridge. Ensure the control and input line sizing matches single-phase specifications, and avoid driving the motor at continuous peak rated torque to mitigate heat accumulation in the rectifier circuit. Keep side clearances to at least 10 mm when multiple units are side-mounted to prevent thermal overload faults (AL.46).
Ensure optical fiber cables connected to CN1A/CN1B maintain a bending radius greater than 25 mm. Sharp bends cause signal degradation, resulting in random communication timeouts and AL.37 errors. Additionally, if the Safe Torque Off (STO) function is not integrated into a safety system, the short-circuit connector must remain firmly plugged into the CN8 port to allow normal amplifier operations.
Before performing any installation, wiring, or maintenance on this amplifier, ensure that the main power supply is completely disconnected. Wait at least 15 minutes after power-down for internal capacitors to discharge. Verify that the charge lamp is fully extinguished prior to handling the power terminals.
Global Express Shipping
Returns & Warranty
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|
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