LUST LTi CDB32.004.C2.4.SH Servo Drive for DC 24 to 48 V
The LUST LTi CDB32.004.C2.4.SH is a servo drive controller from the CDB32 series, a product family developed by LUST Antriebstechnik and later marketed under the LTi Drives brand. This variant is rated at 4 A output current and is designed for a DC supply voltage range of 24 to 48 V, which distinguishes it from the AC fed units in the same range. The revision 24 designation identifies the hardware revision level of the unit, while the C2.4.SH configuration code defines the control board variant, the interface options and the SH feature set.
DC supplied servo drives are used in applications where the machine operates from a battery, a DC bus or a low voltage power supply. Typical environments include mobile equipment, battery powered machinery, automated guided vehicles, laboratory instruments and compact automation systems where a 24 V or 48 V DC rail is already available.
Product Overview
The CDB32.004.C2.4.SH operates as a single axis servo controller. It converts the DC supply into a controlled output voltage and frequency that drives a servo motor. The internal power stage uses pulse width modulation with a high switching frequency, producing smooth current waveforms, low torque ripple and quiet motor operation. The control core executes current, velocity and position loops in a closed cascade, with each loop independently tunable to match the mechanical characteristics of the connected load.
The 4 A output rating suits small servo motors used in positioning tables, feed rollers, tool changers and auxiliary axes. The unit is intended for panel or cabinet mounting and can be installed alongside other drives in a multi axis arrangement. Because the supply is DC, several drives can share a common DC bus without additional rectifier stages, which simplifies the electrical architecture of the machine.
Key Features and Functional Highlights
Feedback support covers resolver, incremental encoder and absolute encoder interfaces, depending on the configuration code. Automatic commutation detection reduces commissioning effort when the motor and drive are paired for the first time. Parameter sets can be stored internally and transferred between units, which simplifies machine replication and spare parts handling.
Integrated monitoring functions continuously evaluate current, voltage, temperature and following error. When a limit is exceeded, the drive triggers a defined fault response and disables the output stage, protecting the motor and the mechanical system. Braking energy generated during deceleration is returned to the DC bus, where it can be absorbed by other drives or by a brake resistor if the bus voltage rises above the permissible limit.
Digital and analog inputs and outputs provide fast interfacing with machine signals such as enable, limit switches, reference pulses and brake control. A motor holding brake output is available for vertical axes. The unit is protected against overcurrent, overvoltage, undervoltage and overtemperature conditions, and it includes an electronic motor overload model that estimates winding temperature without additional sensors.
Technical Specifications
The CDB32.004.C2.4.SH is designed for a DC supply in the 24 to 48 V range. Its 4 A output stage provides sufficient current for small servo motors with short term overload capability for acceleration peaks. Output voltage is derived from the DC supply and modulated by the power stage, and the output frequency range extends across a wide band, supporting both standard servo motors and higher speed applications. The shared DC bus architecture allows several drives to operate from a single supply rail.
Communication with the higher level controller is handled through a fieldbus interface or through conventional analog and digital signals, depending on the configuration. Supported fieldbus protocols across the platform include CANopen, PROFIBUS, EtherCAT and others. This flexibility allows the drive to be used both in centralized motion architectures and in decentralized architectures where the drive performs positioning tasks locally.
Performance and Advantages
Short current loop cycle times produce fast response to torque commands and minimize following error during dynamic moves. The velocity loop can be tuned with adjustable gain, integral time and filter settings, so that resonance in the mechanical train can be suppressed without sacrificing bandwidth. Because the drive operates from a DC supply, it is well suited to mobile and battery powered systems where an AC mains connection is not available.
The compact housing reduces panel volume, and the consistent parameter structure across the CDB32 range means that engineering data can be reused when additional axes are added to a machine. The modular configuration coding system allows a single base platform to be adapted to different feedback types and fieldbus systems by selecting the appropriate ordering code.
Application Areas
The CDB32.004.C2.4.SH is used in mobile machinery, battery powered equipment, automated guided vehicles, laboratory instruments, small machine tools, packaging machinery, handling systems and general automation installations where a DC supply is available. Its compact dimensions and low voltage operation make it suitable for systems where safety or portability requirements favor a DC architecture.
Installation and Commissioning
Installation begins with verifying the DC supply voltage, the motor rating and the feedback type. The drive must be mounted with sufficient clearance to allow convection cooling, and the DC supply connections must observe the correct polarity. Shielding of the motor cable is essential for electromagnetic compatibility, and the shield should be bonded to the panel ground at both ends using a large contact area. Motor and feedback cables should be routed separately from supply and signal cables to reduce interference.
Commissioning typically starts with entering the motor data, either manually or by selecting a stored motor dataset. The feedback system is then checked for correct direction and resolution. After the current loop is verified, the velocity and position loops are tuned using step response tests or automatic tuning routines. Finally, the fieldbus parameters, limit values and fault responses are configured and stored in non volatile memory.
Maintenance and Diagnostics
The drive includes a diagnostic memory that records fault codes, operating hours and critical parameter values at the moment of a trip. Regular maintenance consists of checking panel cooling, verifying terminal torque, inspecting cable shields and clearing dust from heatsink surfaces. Fan units, where fitted, should be replaced according to the recommended service interval.
System Integration and Compatibility
The CDB32.004.C2.4.SH integrates into automation systems through its fieldbus interface or through conventional analog and digital signals. It can be combined with other drives in the same family on a shared DC bus, and it supports master slave torque distribution for mechanically coupled axes. Because the parameter structure is consistent across the CDB32 range, engineering effort can be reused when additional axes are added to a machine.
Selection Guidance
When selecting this drive, the key considerations are the available DC supply voltage, continuous and peak motor current, motor inductance, feedback type, required fieldbus protocol and the available panel space. The 4 A rating and 24 to 48 V DC supply of the CDB32.004.C2.4.SH suit small servo motors and compact axes in DC powered systems. For higher current requirements, other members of the same family provide larger ratings while retaining identical control functionality.
Conclusion
The LUST LTi CDB32.004.C2.4.SH is a compact servo drive designed for DC 24 to 48 V operation, offering precise closed loop control in a small package. Its configuration coding allows it to be tailored to specific machine requirements, while its diagnostic and monitoring features support reliable long term operation. For engineers designing or maintaining motion systems that operate from a DC supply, this drive remains a well understood and practical component.
