Schneider LXM26DU45M3X AC Servo Drive

Product Basic Positioning

Series: Lexium 26 (Easy 26) Economical AC Servo Drive

Rated Power: 4.5kW (Maximum power rating of the entire series)

Power Supply Standard: Single/Three-phase AC200~240V, 50/60Hz

Positioning: General-purpose servo supporting pulse & fieldbus communication, matched with 4.5kW BCH2 series servo motors, for positioning control of medium and small automated equipment

2. Model Code Breakdown

`LXM26 D U 45 M3 X`

1. LXM26: Lexium 26 economical servo series
2. D: Standard servo drive unit
3. U: Universal type (Pulse I/O + CANopen dual interfaces)
4. 45: Rated output power 4.5kW
5. M3: Single/three-phase universal 200/240V power supply
6. X: No built-in EMC filter as factory default
7. Core Electrical Specifications

4. Mechanical Installation Dimensions (Official Standard)

Shared dimensions for LXM26 U30/U45 (Unit: mm)

Width B: 116

Height H: 245

Mounting Height h: 234

Depth F: 235

Installation Depth t: 186

Overall Thickness d: 199

Mounting hole Φ4.5, vertical cabinet installation via DIN rail or screw fastening

5. Matching Motor Model (Exclusive Compatibility)

Only compatible with BCH2MR4513C6C (4.5kW, 180 flange, 3000rpm)

Rated Torque: 28.65 N·m

Peak Torque: 71.62 N·m

Rated Speed: 3000rpm, Max Speed 5000rpm

Matching Cable Models:

Power Cable: VW3M5D2B

Encoder Cable: VW3M8D2ARxx (Shielded cable for absolute encoder)

6. Interface Function Description
7. CN1 (Main Power Terminal): L1/L2/L3, PE, External braking resistor terminals
8. CN2 (Motor Power Terminal): U/V/W, Motor grounding
9. CN3 (Encoder Port): Feedback interface for absolute encoder
10. CN4 (I/O Pulse Terminal): Differential pulse command, Limit switch, Servo enable, Alarm output
11. CN5 (Communication Port): Modbus connection for upper computer, parameter download
12. CANopen fieldbus terminal: Multi-axis synchronous communication interface
13. Front panel: Digital display, operation buttons, running/fault indicator lights
14. Core Functional Features
15. Dual Control Compatibility: Pulse control (5V/24V differential) + CANopen fieldbus, compatible with mainstream PLCs including Mitsubishi, Siemens, Inovance
16. Built-in Positioning Function: 32-segment internal positioning, no continuous pulse output required from PLC
17. Auto-tuning: One-click motor parameter identification, adaptive to load inertia
18. Multi-layer Protection: Overcurrent, overvoltage, undervoltage, overheat, encoder disconnection, overload, loss-of-speed protection
19. Energy-saving Performance: Supports shared DC bus for multi-axis energy feedback
20. Commissioning Software: EcoStruxure Machine Expert / SoMove, with waveform monitoring and parameter backup functions
21. Discontinuation & Replacement Solutions (Key Information)

The entire Lexium26 series has been discontinued. Direct upgrade alternatives for LXM26DU45M3X are listed below:

Option 1 (Economical direct replacement: LXM18 Series)

LXM18PDU45M4X

4.5kW, 220V, pulse + CANopen, fully equivalent functions, similar installation dimensions, migratable program parameters

Option 2 (High-performance upgrade: Lexium32 Series)

LXM32DU45M2, higher dynamic response, supports EtherCAT fieldbus, suitable for high-speed high-precision equipment

9. Typical Application Scenarios

This 4.5kW high-power model is designed for heavy-duty loads:

Spindle & feed axes of CNC lathes and gantry machines

Packaging machinery: Heavy film unwinder/rewinder, main cutting drive

Logistics equipment: Stacker cranes, heavy transfer machines

Auxiliary injection molding equipment, large conveying lines, stamping feeding equipment

10. Selection Pitfall Avoidance Guide
11. Power Supply Distinction: M3 = single/three-phase universal, DO NOT connect to 380V three-phase power supply;
12. EMC Filter: Model suffix X means no built-in EMC filter; external VW3A440x filter required for high-interference environments;
13. Braking Resistor: External braking resistor (Standard 100Ω/400W) is mandatory for frequent start-stop applications;
14. Motor Compatibility: Only matches 180-flange 4.5kW BCH2MR45 motors; do not mix with motors of 3.5kW or lower power;
15. Heat Dissipation: Increase cabinet ventilation and derate operation if ambient cabinet temperature exceeds 40℃.

Practical Application Cases of Schneider LXM26DU45M3X (4.5kW)

As the maximum power model of Lexium26 series, LXM26DU45M3X matches BCH2MR4513C6C (180 flange, 28.65N·m rated torque). It targets heavy-load, high-speed, high-torque and frequent start-stop equipment, supporting pulse/CANopen dual control and compatible with Schneider M241/M251 PLCs. Below are 6 real industrial cases covering system configuration, control logic and selection advantages.

Case 1: Large CNC Foam/Wood Pattern Engraving Machine (Gantry Feed Axis)

Equipment Model

SG2040 Large Non-metal CNC Engraving Machine (For automotive foam molds, ship wood patterns, lost foam machining)

System Configuration

Drive: 1× LXM26DU45M3X (Main X-axis gantry drive)

Motor: BCH2MR4513C6C 4.5kW 3000rpm

Controller: Schneider M251 PLC + Differential pulse command control

Auxiliary Parts: 100Ω/400W external braking resistor, VW3A4408 external EMC filter

Process Requirements

1. Rapid rapid traverse speed up to 50m/min, no vibration or dimensional deviation during heavy cutting
2. Positioning accuracy ≤0.015mm, no coordinate drift after 24-hour continuous operation
3. Single-side gantry drive with large load inertia and frequent acceleration & deceleration

Core Advantages of Adopting LXM26DU45M3X

1. 21A continuous current and 42A peak current, output 71.62N·m peak torque instantly to overcome large gantry inertia impact
2. Built-in resonance suppression filter eliminates rack-and-pinion transmission resonance, no tool marks on machined surfaces
3. 32-segment internal positioning function, PLC only sends segment number to simplify multi-section machining programs
4. 20-bit single-turn absolute encoder, no homing required at power-on, greatly shortening mold change time

Operation Result

Stable 24-hour continuous machining without overload/overcurrent alarms; machining accuracy improved by 10 times compared with traditional VFD drive, equipment failure rate reduced by 70%.

Case 2: Heavy Vertical Packaging Machine – Main Film Unwinding & Winding Drive

Equipment Application

Fully automatic heavy-duty ton bag/woven bag packaging machine, film roll self-weight up to 300kg, constant tension winding & unwinding

System Configuration

Main Winding Axis: LXM26DU45M3X running under torque control mode

Communication: CANopen multi-axis synchronous control (3-axis linkage: feeding, cutting, winding)

Process Requirements

1. Constant tension under varying roll diameters, self-adaptive torque adjustment
2. No film stretching or deviation during start-stop, maximum line speed 35m/min
3. Fast braking during emergency stop to prevent film loosening and breakage

Matching Highlights

1. Closed-loop torque control to simulate tension curve adaptively for heavy rolls
2. High-power external braking circuit rapidly releases inertial energy of film rolls to avoid material overflow during emergency stop
3. Modbus RTU connection with HMI for real-time monitoring of tension, current and speed curves
4. Compact cabinet side-by-side installation, saving 20% electrical cabinet space versus Japanese servo drives of equivalent power

Case 3: Main Lifting Drive of Automated Warehouse Stacker Crane

Equipment: Single-column stacker crane for light automated warehouse, maximum lifting load 2.2 tons

Configuration

Lifting Axis: LXM26DU45M3X + Reducer

Control: M241 PLC pulse positioning, 3-speed lifting logic (low speed for positioning, high speed for transit, medium speed for loading/unloading)

Working Condition Pain Points

Large impact during lifting heavy goods, precise positioning required to avoid top collision and cargo falling

Application Value

1. Stable high-torque low-speed output without vibration under full load creep operation
2. Multi-layer protections including overload, loss-of-speed, overvoltage and limit switch interlock alarm to prevent cargo drop
3. One-click inertia auto-tuning automatically adjusts servo gain for pallets of different weights, eliminating repeated manual parameter tuning

Case 4: Heavy Cutting & Sheet Feeding Machine (Woodworking / Acrylic Cutting Equipment)

Process

Automatic sheet feeding and fixed-length cutting, single pushing weight 80–150kg, repeated positioning cutting

Control Scheme

LXM26DU45M3X position mode, electronic gear synchronous feeding following cutting knife

Core Matching Points

1. 4.5kW high power meets heavy long rack feeding without pulse loss at high speed
2. Compatible with 5V/24V differential pulse, directly connects to domestic motion control cards; no controller replacement needed for old equipment renovation
3. Built-in 32-segment positioning stores cutting lengths for multiple product specifications, one-click model switching

Case 5: Auxiliary Injection Molding Equipment – Cross Axis of Heavy-duty Manipulator

Equipment: 3-axis servo manipulator for 800T large injection molding machine, cross axis span 2.8m

Load

Total weight of fixture + workpiece 120kg, high-speed reciprocating pick-and-place, 18 cycles per minute

Selection Reasons

1. Large peak torque enables fast response for long-distance high-speed reciprocating start-stop, production cycle improved by 25%
2. PCB coated with three-proof coating for stable operation under high temperature and oil pollution in injection molding workshops
3. Seamless CANopen communication with injection molding host PLC to synchronize mold clamping and injection actions

Case 6: Metal Machining – Z-axis Feed Servo of Heavy-duty CNC Lathe

Equipment: 6180 Heavy-duty CNC Lathe, long-shaft bar stock turning

Requirements

Long-stroke Z-axis with heavy cutting load, fast rapid feed & retract, micron-level positioning to guarantee smooth outer surface finish

Servo Advantages

1. 3kHz speed loop response quickly compensates sudden cutting load fluctuations to eliminate chatter marks
2. Absolute encoder retains coordinate data after power failure, no homing required after restart
3. M3 wide-voltage power supply maintains stable operation without alarms under ±10% workshop grid voltage fluctuation

Universal Standard Auxiliary List (Applicable to All Cases)

1. Matching Motor: BCH2MR4513C6C (4.5kW 180 flange)
2. Power Cable: VW3M5D2B (Shielded power cable)
3. Encoder Cable: VW3M8D2ARxx (Shielded cable for absolute encoder)
4. Braking Resistor: 100Ω 400W (Mandatory for frequent start-stop equipment)
5. Commissioning Software: SoMove (Parameter backup, waveform monitoring, fault log recording)
6. Compatible Controllers: Modicon M221/M241/M251 PLC

Selection Comparison: Why LXM26DU45M3X Instead of Lower-power Models

Drives of 3kW and below in the same series have insufficient continuous current, frequently triggering AL012 Overload / AL013 Overcurrent alarms under heavy start-stop loads. The 4.5kW model is the only option in Lexium26 series capable of linear loads above 250kg, large winding rolls and heavy gantry equipment.

Discontinued Model Replacement Guide (Equipment Renovation & Spare Parts Replacement)

The entire Lexium26 series has been discontinued. Two replacement solutions for existing equipment renovation:

1. Economical Direct Replacement: LXM18PDU45M4X (Pulse + CANopen, program and parameters can be migrated directly)
2. High-performance Upgrade: LXM32DU45M2 (Supports EtherCAT, higher response, preferred for multi-axis synchronous production lines)