First TwinCAT PLC Project on a Beckhoff IPC
Build and verify a first TwinCAT PLC project on a Beckhoff IPC. This checklist covers target selection, EtherCAT discovery, I/O mapping, safe activation, restart tests, and commissioning records.
Manufacturer: Mitsubishi Electric
Product No.: MR-J4-60B
Country of origin:United States
Product Type: Servo Amplifiers
Payment: T/T, Western Union
Weight: 2000g
Dimensions: 250 mm x 200 mm x 100 mm
Shipping port: Xiamen
Warranty: 12 months
Providing high-performance motion control via the SSCNET III/H synchronous network, the Mitsubishi Electric MR-J4-60B delivers precise positioning and speed control for demanding industrial automation systems. This 600W servo amplifier features native integration with high-speed motion controllers, utilizing a dedicated serial interface to process feedback loop data with microsecond-level synchronization. Equipped with built-in Safe Torque Off (STO) functionality and advanced real-time auto-tuning, the module ensures robust operational safety and minimizes mechanical vibration during transient acceleration cycles.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Identifier | MR-J4-60B |
| Series | MELSERVO-MR-J4 |
| Output Rated Voltage | 3-phase 170 VAC |
| Output Rated Current | 3.2 A |
| Main Circuit Power Supply | 3-phase or 1-phase 200 VAC to 240 VAC, 50/60 Hz |
| Main Circuit Rated Current | 3.2 A |
| Control Circuit Power Supply | 1-phase 200 VAC to 240 VAC, 50/60 Hz |
| Control Circuit Rated Current | 0.2 A |
| Interface Power Supply Requirement | 24 VDC +/- 10% (Required Current Capacity: 0.3 A) |
| Control Method | Sine-wave PWM control / current control method |
| Safety Standard Compliance | STO (IEC/EN 61800-5-2) |
| Infiltration Protection (IP Rating) | IP20 (Natural cooling, open structure) |
| Operating Ambient Temperature | 0 to 55 degC (non-freezing) |
| Net Weight | 1.0 kg |
| Shipping Weight (Calculated) | 2.0 kg |
| Package Dimensions (Calculated) | 250 mm x 200 mm x 100 mm |
| Port/Connector | Functional Assignment |
|---|---|
| CN1A / CN1B | SSCNET III/H synchronous bus loop input/output connections |
| CN2 | Feedback loop encoder connector (supports high-speed serial encoder communication) |
| CN3 | I/O digital signals, limit switches, and physical stroke inputs |
| CN8 | Safety system dual-channel STO signal connection |
| L1 / L2 / L3 | Main circuit AC power supply input terminals |
| L11 / L21 | Control circuit auxiliary AC power supply input terminals |
| U / V / W | Servo motor power output phase terminals |
The MR-J4-60B serves as the standard replacement path for legacy MR-J3-60B amplifiers on SSCNET III networks. While drop-in physical installation is possible, migration requires setting the parameters via MR Configurator2 to J3 compatibility mode. Note that high-resolution encoder capabilities and specific safety routines are capped when running on older backplanes.
When utilizing single-phase 200 VAC instead of a balanced three-phase system, output current performance must be derated. Ensure the internal dynamic brake resistor cycle limit is not exceeded; high-frequency start/stop sequences can thermal-trip the drive. Maintain at least 10 mm spacing between adjacent drives when close-mounting in high-temperature environments.
Always use correct fiber-optic bend radii (minimum 25 mm) for SSCNET III cabling to avoid communication packet losses (indicated by AL 37 or AL e6 alarms). Ensure that shield grounding brackets are clamped directly to the bare metal mounting plate close to the CN2 encoder cable breakout to minimize EMI loop intrusion.
Isolate and lock out all AC input power feeds before performing any service work. Wait at least 15 minutes after power-down to allow internal high-capacitance reservoirs to discharge fully. Verify that the front panel charge indicator LED is completely extinguished and measure the DC bus voltage across terminals P+ and N- with a certified meter before accessing terminal blocks.
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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
|