Berger Lahr RDM 51122/50 LWC
Berger Lahr RDM 51122/50 LWC
Berger Lahr RDM 51122/50 LWC
Berger Lahr RDM 51122/50 LWC
Berger Lahr RDM 51122/50 LWC
Berger Lahr RDM 51122/50 LWC
Ask our team:
  • Phone: +86 181 0690 9650
  • E-Mail sales1@apterpower.com
How We Verify Your Order
Before dispatch, we confirm the exact model, revision, condition, inspection requirements and shipping documents for your order.
See a real on-site verification case >>

RDM 51122/50 LWC

/ 4.9
1001 reviews | Need a Specific Revision?
The RDM 51122/50 LWC is a phase stepping motor with 10-stranded wire technology, featuring a holding brake, integrated encoder, and power drive D 650 with 4.0 A winding current and 130 V DC supply.
Get a quick price for RDM 51122/50 LWC
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for RDM 51122/50 LWC

  • Manufacturer:
    Berger Lahr
  • Part Number:
    RDM 51122/50 LWC
  • Product Family:
    Berger Lahr
  • Motor Type:
    5-phase stepping motor
  • Size:
    110
  • Winding Technology:
    10-stranded wire
  • Power Drive:
    D 650
  • Winding Current:
    4.0 A
  • Supply Voltage:
    130 V DC
  • Holding Brake Torque:
    4 Nm
  • Brake Power Consumption:
    20 W
  • Brake Engage Time:
    15 ms
  • Brake Disengage Time:
    65 ms
  • Key Benefit:
    Solves the challenge of position holding without continuous power consumption—integrated holding brake locks the shaft when power is removed, while 10-stranded wire technology improves thermal performance and reliability.
  • Weight:
    1.98 kg
  • Estimated shipping dimensions:
    20.6x6x8cm
  • Tariff Code:
    8412291000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Application Firmware & Updates Configuration

Features:

  • Integrated holding brake with 4 Nm holding torque, 15 ms engagement, and 65 ms disengagement—locks the shaft when power is removed for vertical axis applications.
  • 10-stranded wire winding technology reduces copper losses and improves thermal performance, enabling sustained torque output at elevated temperatures.
  • 5-phase stepping motor design with encoder feedback provides smooth motion, high resolution, and precise position control for demanding automation applications.
The RDM 51122/50 LWC integrates a holding brake that delivers 4 Nm of locking torque, engaging in just 15 ms when power is removed. This feature is critical for vertical axes, gantry systems, and any application where the load must remain stationary during power-off conditions. The brake consumes 20 W during operation and disengages in 65 ms when power is applied, allowing the motor to move freely.

Traditional stepping motors use solid copper windings that generate significant heat under sustained operation. The RDM 51122/50 LWC employs 10-stranded wire technology, which reduces eddy current losses and improves heat dissipation. This results in lower operating temperatures for the same torque output, or higher torque capability within the same thermal envelope.

The RDM 51122/50 LWC is a 5-phase stepping motor designed for smooth motion with minimal torque ripple. The integrated encoder provides closed-loop feedback, enabling the drive to monitor actual position and adjust commutation for optimal performance. This eliminates the risk of missed steps—a common issue in open-loop stepping systems—and allows the motor to recover from transient overloads without losing position.

The RDM 51122/50 LWC Berger Lahr Phase Stepping Motor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

Berger Lahr RDM 51122/50 LWC Phase Stepping Motor Manuals, Datasheets, Drivers, Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Berger Lahr RDM 51122/50 LWC Phase Stepping Motor Specs

General

  • Manufacturer Berger Lahr
  • Model RDM 51122/50 LWC
  • Condition New Original ready stock
  • Product Family RDM 51117/50 LWC,RDM 51122/50 LT,RDM 51117/50 LT
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Printing and Packaging Machinery: Used for label tension control, paper feeding, and precision printhead positioning.
  • Textile Machinery: Control of yarn guiding devices and precision movements of weaving machines.
  • Medical Equipment: Moving axes for automated analyzers, liquid sampling systems, and scanning equipment.
  • Important Technical Details: The RDM 51122/50 LWC is a pure hardware stepper motor; it does not contain a microprocessor or flash memory.
  • No Firmware Updates: The motor itself does not require and does not support firmware updates.
  • Driver Level: If you are referring to the accompanying driver (e.g., D900, WD3, SD3 series), firmware updates typically occur at the driver level. Schneider Electric occasionally releases firmware for the driver's communication card (such as a Profibus or CANopen interface card), which requires a dedicated RS232/RS485 adapter cable and Motion Pro or related debugging software for updates.
  • Wiring Configuration: The RDM 51122 is a 3-phase motor and must be connected to a 3-phase stepper driver in the correct phase sequence (usually marked as U, V, W or similar symbols). Incorrect wiring will cause the motor to jitter or not turn.
  • Microstepping: Set the step angle on the driver (via DIP switches or software). The native step angle of a 3-phase motor is typically 1.2° or 0.6°; higher precision can be achieved through driver microstepping.
  • LWC versions typically have specific inductance and current characteristics (approximately 1.7A - 2A, depending on the specific circuit). The operating current must be correctly set on the driver to prevent the motor from overheating.
Description
The RDM 51122/50 LWC is a phase stepping motor from the size 110 series, incorporating 10-stranded wire technology for improved winding efficiency and reliability. It is designed for applications requiring precise positioning with holding brake functionality. The integrated encoder provides closed-loop feedback for enhanced motion control accuracy. 

Built for demanding motion control applications, the RDM 51122/50 LWC operates with a power drive D 650, delivering 4.0 A winding current at 130 V DC. The integrated holding brake provides 4 Nm holding torque with 20 W power consumption, engaging in 15 ms and disengaging in 65 ms. 

The 10-stranded wire technology used in the RDM 51122/50 LWC reduces copper losses and improves thermal performance compared to conventional winding methods. This allows the motor to maintain higher torque output at elevated temperatures, extending operational life in continuous duty applications. 

This stepping motor solves the challenge of maintaining position holding without continuous power consumption through its integrated holding brake. The RDM 51122/50 LWC combines high torque output, precise feedback, and energy-efficient braking in a compact package, ideal for vertical axes, gantry systems.
Alternative Names
RDM 51117/50 LWC RDM 51122/50 LT RDM 51117/50 LT VRDM 5913/50 LN
Exceptional Service

Our Mission

  • 100% Satisfaction

    We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.
  • Trust Guaranteed

    Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.
  • Expertise

    Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the advantage of 10-stranded wire technology in the RDM 51122/50 LWC?
It reduces copper losses and improves heat dissipation, allowing the motor to maintain higher torque output at elevated temperatures compared to conventional winding methods.
What is the holding torque of the integrated brake?
The holding brake provides 4 Nm of torque, engaging in 15 ms and disengaging in 65 ms, ensuring the shaft stays locked when power is removed.
What power drive is recommended for this motor?
The RDM 51122/50 LWC is designed to operate with a D 650 power drive, providing 4.0 A winding current at 130 V DC.