MR-J2S-70B-EB Jinko Serve Drive MRJ2S70BEB Brand New
PRODUCT DETAILS
Mitsubishi MR-J2S-70B-EB MELSERVO-J2S Servo Drive — 0.75kW 200V SSCNET | Brand New
The Mitsubishi MR-J2S-70B-EB is a genuine 0.75kW AC servo amplifier from Mitsubishi Electric's MELSERVO-J2S series — one of the most widely deployed servo drive platforms in CNC machine tools, packaging automation, and industrial robotics across Asia, Europe, and the Americas. Operating on 3-phase 200–230V AC input, with SSCNET high-speed serial communication, and supporting position, speed, and torque control modes, it provides the precise motion control and fast auto-tuning response that demanding production machines require.
✅ 100% genuine Mitsubishi Electric product. Brand new. Ready for immediate worldwide shipment.
Decoding the MR-J2S-70B-EB Model Number
Understanding every character in the model number is essential before ordering — particularly for replacement purchases:
MR - J2S - 70 B - EB
│ │ │ │ └─ EB: Export specification (designed for CE/global markets)
│ │ │ └─────── B: SSCNET communication type (high-speed serial)
│ │ └─────────── 70: 700W (0.75kW) rated output power
│ └─────────────────── J2S: MELSERVO-J2S series (second generation)
└──────────────────────────── MR: Mitsubishi MELSERVO (servo drive family)
Critical suffix note: The "-EB" suffix indicates this is an export / CE-compliant variant of the standard MR-J2S-70B. The EB version meets international EMC and safety standards and is specified for machines sold outside Japan. If your existing drive label shows "MR-J2S-70B" without the "-EB", verify whether your machine was built for the Japanese domestic or export market before ordering.
The "B" interface: The B suffix designates SSCNET (Servo System Controller NETwork) communication — a Mitsubishi proprietary high-speed optical or electrical serial bus that connects the servo drive directly to a Mitsubishi motion controller (Q-series, A-series, FX3U with positioning module, or CNC controller). If your system uses analog ±10V or pulse-train command, you need the MR-J2S-70A (A-type = analog/pulse interface), not the B-type.
Full Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Series | MELSERVO-J2S |
| Model Number | MR-J2S-70B-EB |
| Rated Output Power | 0.75 kW (750W) |
| Power Supply | 3-phase 200–230V AC ±10%, 50/60Hz |
| Control Modes | Position / Speed / Torque |
| Communication Interface | SSCNET (B-type — high-speed serial bus) |
| Compatible Motors | Mitsubishi J2S series (HC-KFS, HC-MFS, HC-SFS) |
| Encoder Support | High-resolution incremental encoder |
| Auto-Tuning | Yes — real-time adaptive tuning |
| Protection Features | Overcurrent, overvoltage, overspeed, encoder fault |
| Regenerative Option | External regenerative resistor support |
| Mounting | Panel mount |
| Certification | CE, UL (EB = export spec) |
| Condition | Brand New |
💡 Motor compatibility: The MR-J2S-70B-EB is rated for 0.75kW servo motors. Compatible Mitsubishi J2S motors include the HC-KFS73 (750W, flange mount) and HC-MFS73 (750W, flat type). Always verify the motor's rated capacity matches the drive's rated output before installation.
MR-J2S vs MR-J3 vs MR-J4 — Understanding the Generation Difference
The MR-J2S is a mature, proven platform. Here's how it compares to newer generations — important for engineers deciding between replacing in-kind vs upgrading:
| Feature | MR-J2S (This Drive) | MR-J3 | MR-J4 |
|---|---|---|---|
| Communication | SSCNET (copper) | SSCNET III (optical fiber) | SSCNET III/H (optical fiber, faster) |
| Encoder resolution | 131,072 ppr (17-bit) | 262,144 ppr (18-bit) | 4,194,304 ppr (22-bit) |
| Auto-tuning | Adaptive real-time tuning | One-touch tuning | Advanced vibration suppression |
| Safety function | Basic | STO (Safe Torque Off) optional | STO built-in |
| Status display | LED indicators | 3-digit 7-segment | 3-digit + diagnostic |
| Interchangeability | J2S motor only | J3 motor only | J4 / J3 motor (backward compat.) |
| Ideal use case | ⭐ Direct replacement for existing J2S | Upgrade from J2S (requires new motor) | New machine builds, high precision |
When to replace in-kind with MR-J2S-70B-EB: If your machine is already running a J2S system and you are replacing a failed drive only — without changing the motor, cabling, or motion controller — a like-for-like MR-J2S replacement is the fastest, lowest-risk solution. Upgrading to J3 or J4 requires motor and often cabling replacement as well.
MR-J2S-70B-EB vs Adjacent Power Ratings
The "-70" in the model number means 700W/0.75kW. If you need a different power rating in the same J2S-B-EB series, here is the lineup:
| Model | Rated Power | Compatible Motor (typical) |
|---|---|---|
| MR-J2S-10B-EB | 100W | HC-KFS13 |
| MR-J2S-20B-EB | 200W | HC-KFS23 |
| MR-J2S-40B-EB | 400W | HC-KFS43 |
| MR-J2S-70B-EB | 750W (0.75kW) | HC-KFS73 ⭐ |
| MR-J2S-100B-EB | 1.0kW | HC-SFS102 |
| MR-J2S-200B-EB | 2.0kW | HC-SFS202 |
⚠️ Drive and motor power ratings must match exactly. A 0.75kW drive cannot power a 1.0kW motor, and using an oversized drive with an undersized motor causes parameter mismatch alarms. Always verify both the drive nameplate and the motor nameplate before ordering.
SSCNET System Architecture — How the B-Type Drive Connects
The MR-J2S-70B-EB requires a Mitsubishi motion controller or positioning module as the command source. Common SSCNET master controllers include:
- Mitsubishi Q-Series with QD75M / Q172 motion module — multi-axis CNC and motion
- Mitsubishi FX3U-20SSC-H — 2-axis SSCNET positioning for FX3U PLC systems
- Mitsubishi A-Series with A172/A273 motion controllers — older multi-axis systems
- Mitsubishi CNC controllers (M64, M65, E68) — CNC machine tool spindle/axis control
The SSCNET bus daisy-chains multiple drives from the controller — each drive in the chain has an SSCNET IN and SSCNET OUT terminal. Up to 8 axes can be connected per SSCNET bus segment, making the B-type drive intrinsically a multi-axis networked solution rather than a standalone amplifier.
⚠️ Cannot use with standalone pulse-train or analog ±10V command. If your machine uses a non-Mitsubishi controller issuing pulse or analog commands, you need the MR-J2S-70A-EB (A-type), not this B-type unit.
Common Alarm Codes on MR-J2S Drives
Maintenance engineers replacing a failed MR-J2S-70B-EB should first diagnose whether the drive or the motor is the root cause. Common J2S alarm codes indicating drive-side failure:
| Alarm Code | Description | Likely Cause |
|---|---|---|
| AL.10 | Undervoltage | Power supply issue or drive PSU failure |
| AL.16 | Encoder error | Encoder cable fault or drive encoder circuit |
| AL.32 | Overcurrent | Drive output stage failure (IGBT) |
| AL.50 | Overload | Excessive load or drive thermal protection |
| AL.52 | Overspeed | Drive command error or encoder feedback failure |
If the display shows AL.32 (overcurrent) or the drive is completely unresponsive with no display, the drive IGBT stage has typically failed and drive replacement is required. If the alarm is encoder-related (AL.16), check the encoder cable and motor encoder before replacing the drive.
Shipping & Quality Guarantee
- 🔒 100% genuine Mitsubishi Electric product — brand new
- ✅ Not refurbished, not repaired, not surplus stock
- 🔍 Model number and physical label verified before dispatch
- 📦 Anti-static and shock-resistant industrial packaging
- 🌍 Worldwide express shipping (DHL, FedEx, UPS)
- ⚡ In-stock orders dispatched within 1–2 business days
FAQ — Mitsubishi MR-J2S-70B-EB Servo Drive
Q1: Is this a genuine Mitsubishi Electric product? Yes. Every MR-J2S-70B-EB we supply is a 100% genuine Mitsubishi Electric MELSERVO-J2S servo drive — brand new with factory labeling and original packaging. We do not supply repaired, refurbished, or counterfeit drives. Using non-genuine servo drives in precision CNC or production automation creates significant risks to machine accuracy, reliability, and operator safety.
Q2: What is the difference between MR-J2S-70B-EB and MR-J2S-70A-EB? The critical difference is the command interface. The B-type (this drive) uses SSCNET — Mitsubishi's proprietary high-speed serial network — and requires a Mitsubishi motion controller (Q-series, FX3U-20SSC-H, A-series, or CNC) as the command master. The A-type accepts analog ±10V speed/torque commands or pulse-train position commands, making it compatible with any controller that outputs these standard signals. You cannot interchange B-type and A-type drives in an existing system.
Q3: What Mitsubishi motors are compatible with the MR-J2S-70B-EB? The MR-J2S-70B-EB is rated for 0.75kW (750W) J2S-series servo motors. The most common compatible motors are the HC-KFS73 (standard flange mount) and HC-MFS73 (flat/low-profile). Using a motor with a different power rating will cause parameter mismatch alarms. Verify the motor's nameplate rated output matches the 0.75kW drive rating before installation.
Q4: Can the MR-J2S-70B-EB be upgraded to MR-J4? Functionally yes, but it is not a direct drop-in replacement. Upgrading from J2S to J4 requires: (1) replacing the drive (MR-J4-70B or MR-J4-70A depending on interface); (2) replacing the servo motor with a J4-compatible model; (3) replacing the encoder cable (J4 uses a different connector standard); (4) updating the motion controller SSCNET configuration. For machines where only the drive has failed, a like-for-like J2S replacement is faster, lower cost, and lower risk.
Q5: What does the "-EB" suffix mean on the MR-J2S-70B-EB? The "-EB" suffix indicates the export / CE-compliant version of the MR-J2S-70B, meeting IEC/EN EMC and safety standards for machines sold outside Japan. The domestic Japanese version (MR-J2S-70B without suffix) has different certification markings. For machines installed in Europe, North America, and most export markets, the EB version is the correct specification.
Q6: How do I replace a failed MR-J2S-70B-EB without losing machine parameters? Before removing the failed drive: (1) Use MR Configurator software to back up all servo parameters (Pr. groups 1–4) if the drive is still partially functional; (2) Note the SSCNET address/axis number set on the existing drive. After fitting the new drive: (3) Restore parameters from backup via MR Configurator or re-enter manually from the machine documentation; (4) Perform auto-tuning to re-establish optimal gain settings for your specific load; (5) Verify SSCNET communication is established before enabling servo-on.
Q7: Is there a risk of getting a counterfeit MR-J2S-70B-EB? Yes — counterfeit Mitsubishi servo drives exist in the market, particularly for high-demand models like the J2S series. Signs of a counterfeit unit include: inconsistent label printing quality, missing or incorrect CE/UL markings, absence of a Mitsubishi Electric holographic seal, and unusually low pricing. All units we supply carry genuine Mitsubishi Electric serial numbers that can be verified with Mitsubishi Electric's regional service centers.
Drive showing AL.32 or no display? Share your machine model, existing drive nameplate details, and alarm history — our technical team will confirm the correct replacement part and arrange priority shipment.
