MR-J2-200CT AC Servo Amplifier Module MRJ2200CT Genuine New
Product Overview
The Mitsubishi MR-J2-200CT is a 2.0kW servo amplifier from Mitsubishi Electric's MR-J2 Series, distinguished from the standard MR-J2-200A pulse train input variant by its built-in positioning controller. This makes the CT model a genuinely self-contained motion control solution for a broad range of industrial automation tasks.
While standard servo amplifiers require an external controller (PLC, motion controller, or CNC) to generate position commands, the MR-J2-200CT houses its own positioning logic. It can store up to 16 pre-programmed target positions in the amplifier's internal point table, then trigger each position via contact input signals from a simple PLC digital output or relay—eliminating the need for pulse train generators or complex motion programming.
This architecture represents the MR-J2 CT series' defining advantage in cost-sensitive automation applications. Dedicated indexing tables, rotary actuators with multiple positions, and conveyor systems requiring precise stopping points are ideal applications where the MR-J2-200CT eliminates the need for dedicated positioning controllers.
Key Specifications
| Rated Output |
2.0 kW |
| Rated Current |
Approx. 11.4A |
| Input Supply |
3-phase 200-230VAC |
| Input Range |
170-253VAC |
| Speed Frequency Response |
250Hz |
| Built-In Positioning |
Up to 16 points |
| Communication |
RS-422 / RS-232C |
| Dynamic Brake |
Built-in |
| Operating Temperature |
0-55°C |
| Weight |
4.4 kg |
| Status |
Discontinued |
Built-In Positioning – The CT Series Advantage
The MR-J2-200CT's positioning capability operates from a point table stored in the amplifier's non-volatile memory. Each of the 16 point table entries defines a target position (in encoder pulses or user-defined units), movement speed, and acceleration/deceleration ramp parameters.
During operation, the controller selects which point table entry to execute by activating contact inputs from the machine's PLC or relay panel. The amplifier reads the selected point number, executes the move to the corresponding position, and signals completion through a digital output contact.
For single-axis applications or simple multi-axis machines where axes operate independently, the MR-J2-200CT's built-in positioning eliminates the need for dedicated motion controllers entirely, creating a streamlined three-level hierarchy: PLC → MR-J2-200CT → servo motor.
250Hz Speed Frequency Response – Performance in Dynamic Applications
The 250Hz speed frequency response of the MR-J2-200CT's velocity control loop defines the amplifier's ability to track rapid speed command changes. This specification determines how aggressively the servo can reject load disturbances and follow velocity profiles without overshoot or instability.
At 250Hz response, the MR-J2-200CT can reject load torque disturbances occurring faster than approximately 4ms, providing stiff mechanical response in applications with cutting forces, material resistance, or friction impulses that create rapid load variations.
Communication Interfaces – RS-422 and RS-232C
The MR-J2-200CT includes two serial communication interfaces serving different purposes:
- RS-422: Used for connection to Mitsubishi's CR-series operator panels or for PC-based parameter and point table configuration using MR Configurator software. The differential interface supports reliable communication over longer cable runs (up to approximately 30m).
- RS-232C: Supports direct connection to a PC for single-unit programming and diagnostics. MR Configurator software connects via RS-232C to read/write amplifier parameters, upload/download point tables, monitor real-time operating variables, and perform graphical tuning diagnostics.
Frequently Asked Questions
Q1: What is the difference between the MR-J2-200CT and the MR-J2-200A, and how do I choose between them?
The MR-J2-200A is the general-purpose pulse train input variant that accepts position command pulses from an external controller. The MR-J2-200CT has built-in positioning from a stored point table and is triggered by contact inputs. Choose the CT for discrete point-to-point positioning without an external motion controller, and the A variant when the application needs full multi-axis interpolation or arbitrary trajectory following.
Q2: Can the MR-J2-200CT be used with a standard Mitsubishi PLC to implement more than 16 positions?
The MR-J2-200CT's internal point table stores exactly 16 positions accessible via contact inputs. For applications requiring more positions, use the RS-422/232C serial interface to download new point table entries from the PLC before executing moves, or upgrade to a Mitsubishi motion controller that provides unlimited positioning capability.
Q3: Does the MR-J2-200CT support absolute position detection, so that homing is not required at power-up?
The MR-J2-200CT uses an incremental encoder standard. Absolute position data is not retained when power is removed, so a home return operation is required at each power-up. Mitsubishi's later MR-J2S series introduced absolute encoder compatibility with battery-backed position retention.
Q4: What regenerative resistor (braking resistor) is required with the MR-J2-200CT?
The MR-J2-200CT includes a built-in regenerative circuit sufficient for applications with moderate regenerative energy. For high-inertia loads, frequent deceleration cycles, or high-speed braking requirements, an external regenerative resistor option may be required to safely dissipate regenerative energy without triggering overvoltage protection.
Q5: Is the MR-J2-200CT directly interchangeable with the MR-J2S-200CT (the Super series successor)?
The MR-J2 and MR-J2S series are not directly pin-compatible—connector positions and signal assignments differ. The MR-J2S-200CT provides enhanced performance but requires wiring adaptation if substituted into an existing MR-J2 installation. For maintenance replacement in existing MR-J2 installations, use another MR-J2-200CT.
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