The Mitsubishi INR-244-755 is a high-efficiency servo power supply unit from the MDS series, engineered to deliver stable, regulated DC bus power to servo amplifiers and CNC drive systems in demanding industrial environments. Designed for integration within Mitsubishi Electric’s broader motion control ecosystem, the INR-244-755 plays a critical role in reducing unnecessary energy consumption at the drive level — directly impacting factory-wide power efficiency, equipment uptime, and production line throughput.
In modern manufacturing, unplanned downtime at the power conversion stage is one of the most overlooked sources of operational cost. The INR-244-755 addresses this by providing a clean, consistent power supply to downstream servo amplifiers such as the MDS-D2-SP and MDS-EJ-SP units, ensuring that motor drives receive precisely conditioned power without voltage fluctuation or harmonic distortion. This directly reduces thermal stress on connected components, extends the service life of servo motors, and minimizes reactive power losses across the drive bus.
Product Specification Table
| Parameter |
Specification / Value |
| SKU / Part Number |
INR-244-755 |
| Brand |
Mitsubishi Electric |
| Series |
MDS (Motion Drive System) |
| Product Type |
Servo Power Supply Unit |
| Application Environment |
CNC Machining Centers, Multi-Axis Servo Systems, Industrial Automation Lines |
| Compatible Systems |
MDS-D2, MDS-EJ, MDS-B Series Servo Amplifiers; Mitsubishi CNC M70/M80/M800 Controllers |
| Energy Efficiency Value |
Stable DC bus output reduces reactive power loss; supports regenerative braking energy recovery |
| Power Input |
Three-phase AC (200–230V class, per MDS series specification) |
| Operating Temperature |
0°C to 55°C (standard industrial panel environment) |
| Origin |
Japan |
| Warranty |
12-Month Warranty |
| Stock Status |
In Stock — Pre-shipment functional testing included |
System Compatibility and Application
The INR-244-755 is not a standalone component — it functions as the energy backbone of a coordinated servo drive system. In a typical CNC machining center or multi-axis automation cell, the power supply unit feeds regulated DC bus voltage to multiple servo amplifiers simultaneously. When paired with MDS-D2-SP2-080 or MDS-EJ-SP-150 spindle amplifiers, the INR-244-755 ensures that spindle acceleration and deceleration cycles are powered without voltage sag, which is a common cause of positioning error and thermal overload in high-cycle production environments.
On the control side, the Mitsubishi M80 CNC controller or M800S series communicates with the servo system via high-speed SSCNET III/H fiber optic protocol, enabling real-time torque and speed feedback that allows the system to dynamically adjust power draw based on actual load demand. This closed-loop maintenance planning — from the INR-244-755 power supply through the servo amplifier to the servo motor — eliminates the over-provisioning of power that is common in open-loop drive configurations.
For facilities running mixed automation architectures, the INR-244-755 can coexist within panels that also house Mitsubishi FR-A800 series variable frequency drives for induction motor control. While the FR-A800 manages conveyor and pump loads through variable speed regulation, the INR-244-755 handles the precision servo axes — together forming a complementary maintenance planning layer across both positioning and process drive applications. Adding a Mitsubishi Q64AD analog input module to the control rack enables real-time power consumption monitoring at the I/O level, feeding data back to the PLC for energy logging and demand forecasting.
In larger system architectures, the Mitsubishi Q06UDEHCPU Q series PLC acts as the central coordinator, managing production scheduling, axis sequencing, and energy state transitions. When the line enters a low-demand period, the PLC can issue standby commands that reduce servo bus activity, allowing the INR-244-755 to operate at partial load — a significant contributor to idle-state operational stability. HMI visibility into these states is typically provided through a Mitsubishi GOT2000 series touch panel, giving operators real-time insight into drive status, power draw, and fault history without requiring separate SCADA infrastructure.
Maintenance and Replacement Notes
In high-throughput machining environments, the quality of servo power supply directly determines cycle time consistency and tool life. Voltage instability at the DC bus level causes micro-variations in servo torque output, which translates to surface finish degradation and increased tool wear — both of which carry hidden energy costs in the form of rework, scrap, and unplanned maintenance. The INR-244-755 eliminates this variability by maintaining a stable bus voltage even during rapid axis reversals and simultaneous multi-axis acceleration events.
Facilities that have integrated the INR-244-755 into their MDS-based servo systems report measurable reductions in unplanned downtime related to drive faults. Because the power supply unit provides clean, conditioned input to downstream amplifiers, nuisance trips caused by voltage spikes or harmonic interference are significantly reduced. This directly improves Overall Equipment Effectiveness (OEE) by increasing the ratio of productive machine time to total scheduled time.
From a predictive maintenance perspective, the INR-244-755’s stable operating characteristics make it easier to establish baseline power consumption profiles for connected servo axes. Deviations from these baselines — detectable through the Q series PLC’s condition monitoring functions or through an external power analyzer — serve as early indicators of mechanical wear in servo motors, ball screws, or spindle bearings. Catching these anomalies before they cause catastrophic failure reduces both repair costs and the unplanned downtime associated with degraded mechanical efficiency.
Every INR-244-755 unit shipped from ZYPLC undergoes pre-shipment functional testing to verify output voltage stability, ripple characteristics, and thermal performance under load. Units are sourced from verified supply channels and are backed by a 12-month warranty, ensuring that your production line investment is protected from day one. In-stock availability means reduced lead times and faster line recovery in the event of an unplanned drive failure.
Product Sourcing FAQ
Q1: How does the INR-244-755 contribute to operational stability compared to a standard power supply?
The INR-244-755 is designed specifically for MDS-series servo systems, providing a tightly regulated DC bus that minimizes reactive power losses and supports regenerative energy recovery during servo deceleration. Unlike general-purpose power supplies, it is optimized for the dynamic load profiles of CNC servo axes, reducing wasted energy during acceleration, deceleration, and idle phases.
Q2: Which servo amplifiers and CNC controllers is the INR-244-755 compatible with?
The INR-244-755 is compatible with Mitsubishi MDS-D2, MDS-EJ, and MDS-B series servo and spindle amplifiers. It is designed for use with Mitsubishi CNC platforms including the M70, M80, and M800 series controllers. For system integration questions specific to your machine configuration, contact our technical team before ordering.
Q3: Can the INR-244-755 replace a failed unit on an existing production machine without reconfiguration?
In most cases, yes. The INR-244-755 is a direct replacement unit within compatible MDS-series drive systems. No parameter reconfiguration is typically required at the power supply level, as servo parameters are stored in the CNC controller or amplifier. However, we recommend verifying the exact machine model and existing drive configuration with our team to confirm compatibility before installation.
Q4: What does the 12-month warranty cover, and what is the testing process before shipment?
The 12-month warranty covers manufacturing defects and functional failures under normal operating conditions. Prior to shipment, every INR-244-755 unit undergoes functional testing including output voltage verification, load response testing, and visual inspection for component integrity. A test report is available upon request. Warranty claims are handled directly through ZYPLC with fast replacement turnaround to minimize production disruption.
© 2026 ZYPLC. All rights reserved.
Original Source: https://zyplc.com
Contact: +86 19859288691 | plc.sales@zyplc.com
