Mitsubishi MR-J2S-350CP-S084 AC Servo Drive

Description

💡 “CP” = Built-in Positioning — the key differentiator:

• MR-J2S-350A​ = Pulse-input type — requires PLC to generate pulse train for position control
• MR-J2S-350CP​ (this unit) = Built-in positioning function​ — stores multiple target positions, speeds, and acceleration/deceleration times in internal tables; DI signals select and trigger positioning operations. No pulse generator needed from the host PLC .

This makes MR-J2S-350CP-S084 ideal for applications where you want to offload positioning logic from the PLC — the PLC simply sends a “go to point N” command via DI bits, and the drive executes the full motion profile autonomously.

• Model breakdown​ (Mitsubishi MELSERVO-J2S naming):
  • MR-J2S​ = MELSERVO J2-Super series (launched early 2000s, successor to MR-J2)
  • 350​ = 3500 W (3.5 kW)​ rated output
  • C​ = Command-type (built-in positioning function)
  • P​ = Reserved letter for CP-series
  • S084​ = Internal design/suffix code (designates the specific S084 hardware revision within the CP family)
  • → MR-J2S-350CP-S084 = 3.5kW J2-Super servo drive with built-in positioning, 200V class, 3-phase input, S084 design

⚠️ DISCONTINUED — but still heavily maintained via aftermarket: Mitsubishi has officially discontinued the MR-J2S series (including MR-J2S-350CP-S084) . Due to its massive installed base in 2000s–2010s machinery, the aftermarket (NOS/new-old-stock, refurbished, surplus) remains active. Many factories still run MR-J2S-350CP-S084 as the primary 3.5kW servo drive on conveyors, feeders, extruders, and mid-size machine tool axes. We maintain NOS inventory to support urgent replacement needs.

⚠️ J2S-CP is NOT a J4/JE drive!​ Despite being from the same Mitsubishi MELSERVO family, the MR-J2S-350CP-S084 is only compatible​ with:

• Servo motors: Mitsubishi HC-SFS301, HC-SFS352, HC-SFS353​ (3000 rpm class), HC-RFS203, HC-RFS202​ (2000 rpm class), HC-LFS202​ (2000 rpm class), HA-LFS202​ (2000 rpm class)
• NOT compatible​ with MR-J4, MR-JE, or MR-J3 servo motors — different encoder protocol, different power-stage tuning. Forcing a mismatch will throw alarm AL.E (encoder error) or AL.50 (overspeed).
• Regeneration: For MR-J2S-350CP-S084 and below, the regenerative brake resistor is factory-wired across P-D​ (built-in) . Unlike the 500CP and above (which use P-C), you cannot​ connect a regenerative converter or brake unit across P-N on the 350CP — attempting to do so will damage the drive . For high-inertia applications, you must either manage deceleration energy within the built-in resistor’s capacity, or consult Mitsubishi for optional configurations.

Key Features​

• 3.5 kW rated output​ — the mid-range power class of the J2S-CP family, driving 3500W-class servo motors (HC-SFS301/352/353, HC-RFS202/203, HC-LFS202, HA-LFS202)
• Built-in positioning function​ — onboard point tables store target position, speed, accel/decel; DI-triggered positioning eliminates PLC pulse generation
• RS-422 multi-drop​ — up to 32 MR-J2S-CP drives on a single RS-422 network; centralized motion coordination from a PC/PLC via MR Configurator
• 17-bit high-resolution encoder​ (131,072 pulses/rev) — absolute position detection; home return needed only once, then absolute tracking maintained
• Adaptive vibration suppression​ — auto-detection of mechanical resonance, automatic filter tuning to suppress vibration
• Auto-tuning​ — automatically adjusts gain to optimum based on load; superior to original MR-J2 series
• Built-in dynamic brake​ — integrated DB resistor for controlled deceleration (factory-wired P-D)
• Forced ventilation cooling​ — internal fan for thermal management
• Multiple control modes​ — position, speed, torque; online switchable
• Comprehensive protection​ — overcurrent, regeneration overvoltage, overload (electronic thermal), motor overheat, encoder fault, regeneration fault, undervoltage, sudden power loss, overspeed, excessive error
• Sine-wave PWM control / current control method​
• Compact dimensions: 168 × 90 × 195 mm (H×W×D), weight 2.0 kg

Technical Specifications (MR-J2S-350CP-S084 — 3.5kW Built-in Positioning Servo Drive)

⚠️ Critical compatibility & selection notes:

1. Motor pairing is STRICT​ — Per Mitsubishi’s official combination table , MR-J2S-350CP-S084 pairs EXCLUSIVELY with:
   • HC-SFS301​ (3.5kW, 3000 rpm, no brake)
   • HC-SFS352​ (3.5kW, 2000 rpm variant)
   • HC-SFS353​ (3.5kW, 2000 rpm variant)
   • HC-RFS202 / HC-RFS203​ (2kW class — compatible per combination table )
   • HC-LFS202​ (2kW class)
   • HA-LFS202​ (2kW class)
   Pairing with any other motor (HC-SFS202, HC-SFS502, HC-KFS, etc.) will cause alarm. If your existing motor is HC-SFS301/352/353 → this drive is 100% compatible.
2. 3-phase 200–230VAC input REQUIRED​ — The 350CP does NOT support single-phase 230V​ (that’s only for ≤750W J2S-CP models) . You must supply 3-phase 200–230VAC​ (typical in industrial Japan, Asia, and parts of Europe). For 400V-class 3-phase regions (North America, etc.), a step-down transformer is required.
3. Built-in positioning vs pulse input​ — Because this is a -CP​ model, you CAN run it in two ways:
   • Standalone positioning: Load point tables via MR Configurator software, trigger via DI bits (no PLC pulse needed)
   • Traditional pulse mode: Also accepts differential pulse train input (up to 1Mpps) if you want PLC-based control
   This flexibility is the #1 reason engineers choose -CP over -A.
4. RS-422 multi-drop networking​ — Up to 32 MR-J2S-CP drives can share a single RS-422 bus. A PC running MR Configurator (or a PLC with RS-422 master) can coordinate all axes . This is a cost-effective alternative to SSCNET (which is the -B variant).
5. ⚠️ Regeneration limitation (CRITICAL for 350CP and below)​ — Unlike the MR-J2S-500CP and above (which wire the built-in regen resistor across P-C and CAN use external regen options across P-C ), the MR-J2S-350CP-S084 wires its built-in regen resistor across P-D​ . You CANNOT​ connect a regenerative converter or brake unit across P-N on the 350CP . If your application involves high-inertia loads with frequent deceleration (vertical lifts, large flywheels, rapid start-stop), the built-in resistor capacity may be exceeded, causing AL.16 (regen overvoltage) alarms. In such cases, you must either:
   • Reduce deceleration frequency / increase decel time to stay within built-in regen capacity
   • Upgrade to MR-J2S-500CP-S084 or higher​ (which supports external regen options)
   • Consult Mitsubishi for optional configuration (some configurations may allow external regen across P-C on 350CP — verify with the official MR-J2S-_CP-S084 manual)
6. Discontinued — verify NOS condition​ — Since Mitsubishi has discontinued this drive , ensure your supplier provides: (a) new-old-stock (NOS) with original packaging, or (b) professionally refurbished with full bench test report (no-alarm power-on, encoder comm test, positioning table execution, DI/DO verification, fan operation check). Clones and “compatible” drives will NOT work — the J2S encoder protocol is proprietary.

Distinguishing MR-J2S-350CP-S084 from Other J2S Variants

Warranty & After-Sales

• Factory new (NOS) units: 12 months warranty
• Refurbished units: 3-6 months warranty (bench: 3-phase 200VAC power-up → no-alarm self-test → connect HC-SFS352 motor dummy load → MR Configurator RS-422 link → load positioning point table → execute multi-point positioning sequence → verify 17-bit encoder feedback → DI/DO verification → fan operation check → verify P-D regen resistor continuity)
• Technical support for:
• Exact motor pairing​ (verify your existing motor is HC-SFS301/352/353, HC-RFS202/203, HC-LFS202, or HA-LFS202 — we cross-check the motor nameplate against Mitsubishi’s official combination table )
• MR-J2S-350A → 350CP upgrade​ (if your current drive is 350A and you want built-in positioning, the 350CP is a drop-in hardware replacement; you’ll need to configure point tables via MR Configurator — we guide you through it)
• MR-J2S-350B → 350CP migration​ (if you’re moving from SSCNET to RS-422 standalone positioning; wiring changes required — we provide the conversion schematic)
• Positioning point table setup​ (MR Configurator software: define point tables with target position, speed, accel/decel; map DI bits to point selection; we do remote screen-share assistance)
• RS-422 network configuration​ (up to 32 CP drives on one RS-422 bus; station ID setting via rotary switch; baud rate; master = PC with MR Configurator or PLC with RS-422 master)
• ⚠️ Regen limitation advisory​ (we explicitly warn: 350CP CANNOT use external regen converter/brake unit across P-N; if your load requires it, upgrade to 500CP-S084 or higher; we help assess your decel energy and advise)
• Alarm troubleshooting​ (AL.50 overspeed, AL.E encoder error, AL.16 regen overvoltage, AL.50 overload — we diagnose from your alarm code and provide corrective action)
• MR Configurator software​ (we supply MR Configurator and USB-RS-422 adapter for commissioning)
• Migration to MR-J4/JE​ (if you want to upgrade from discontinued J2S to current MR-J4-A or MR-JE-A — note: this requires new motor + new drive + rewiring + program conversion; we can scope the migration, but a like-for-like J2S-350CP-S084 replacement is far simpler for existing machines)
• Optional: HC-SFS301/352/353 servo motor (3.5kW, with/without brake), MR Configurator software + USB-RS-422 adapter, CN1 I/O cable (MR-J2S-CN1CBL), encoder cable, power cable, 24V DC control power supply, replacement cooling fan

Delivery Time

• Standard delivery: 3-5 working days (stock NOS)
• Express shipping available upon request
• Note: Mitsubishi Japan direct lead time = discontinued; we maintain NOS inventory globally for urgent replacement

Why Choose Our Store

• Genuine Mitsubishi Electric MR-J2S-350CP-S084 — not gray-market (the J2S proprietary encoder protocol ASIC, 17-bit absolute encoder interface, and built-in positioning engine firmware are factory-calibrated; clones fail encoder comm, throw AL.E, and cannot execute point tables)
• Global supply network with competitive pricing on full MELSERVO J2S-CP family (MR-J2S-10CP through 700CP-S084)
• Expertise in MR-J2S-350CP-S084 system (motor pairing verification against Mitsubishi combination table, CP vs A vs B differentiation, RS-422 32-axis networking, point-table configuration via MR Configurator, regen limitation awareness (P-D only, no external regen), alarm diagnostics, J2S→J4 migration scoping)
• Comprehensive technical documentation (MR-J2S-350CP-S084 dimensional drawing, CN1 I/O pinout, HC-SFS301/352/353 motor combination table, point-table setup guide, RS-422 networking topology, alarm code reference, MR-J2S-_CP-S084 instruction manual )
• Responsive customer service and support

Applications

• Mid-Size Machine Tool Axes: 3.5kW MR-J2S-350CP-S084 driving HC-SFS352 on a CNC milling machine’s feed axis or a medium-duty rotary table. Built-in positioning point tables handle tool changer sequencing, pallet shuttle, and index moves — all without consuming PLC pulse output resources. RS-422 networking coordinates with other J2S-CP axes on the same machine.
• Extrusion / Converting Lines: On plastic extrusion or paper converting lines, the MR-J2S-350CP-S084 drives a 3.5kW servo motor for precision pull rolls or cutter feeds. The built-in positioning engine executes multi-stage feed profiles (fast approach → slow feed → dwell → retract) triggered by simple DI signals from the line controller. No motion PLC needed.
• Conveyor / Material Handling: High-speed conveyor sorting systems using 3.5kW servo-driven transfer cars. MR-J2S-350CP-S084’s point tables define multiple stop positions; the warehouse control system sends a 4-bit DI code to select the destination, and the drive autonomously executes the S-curve profile. Up to 32 such axes can share one RS-422 network.
• Printing / Web Handling Machinery: Web-fed printing presses use MR-J2S-350CP-S084 to drive main web traction servos (3.5kW). Registration marks trigger point-table positioning for precise cutoff; adaptive vibration suppression eliminates web flutter at high speed. Absolute 17-bit encoder means no home return after power cycle — critical for continuous printing processes.
• Packaging Machines: Cartoning, case packing, and palletizing machines use 3.5kW servo axes for pick-and-place arms, servo pushers, and indexing dials. The built-in positioning engine handles complex multi-point sequences (e.g., “pick from pos A → rotate 90° → place at pos B → return to home”) triggered by a single DI start signal. This dramatically simplifies the PLC program and reduces scan-time overhead.
• Legacy Machine Retrofit Spare: For factories running 2000s–2010s machinery with MR-J2S-350CP-S084 as the original drive, keeping a genuine NOS unit on the shelf means a failed drive can be swapped in <30 minutes vs. weeks of lead time and costly J4 migration. The machine’s existing HC-SFS352 motor, CN1 I/O wiring, and RS-422 network remain 100% compatible.
• Multi-Axis RS-422 Motion Network: A packaging machine with 6 servo axes (mix of 1kW, 2kW, 3.5kW) all using MR-J2S-xxCP drives. A single RS-422 bus connects all 6 to a central PC running MR Configurator for coordinated motion. The 3.5kW MR-J2S-350CP-S084 handles the heaviest axis (e.g., film pull or case erector); lighter axes use 200CP/100CP drives. This architecture avoids the cost and complexity of SSCNET (-B drives) while delivering centralized motion control.
• Robotics / Automation Cells: 3.5kW servo axes in gantry robots, SCARA robots, and 6-axis articulating robots use MR-J2S-350CP-S084 for the primary lift/transfer axes. The built-in positioning engine handles joint homing sequences and teach-point execution; RS-422 networking allows centralized coordination from the robot controller.