LUST LTI CDB34 Servo Drives: CDB34.014.W2.4.BR.SH.OL.HF

Technical Dossier

Product Details And Specifications

LUST LTI CDB34 Series: Comprehensive Module Range and Technical Overview

The LUST LTI CDB34 series is a compact, application-specific servo drive platform developed by LUST Antriebstechnik GmbH (later integrated under LTI Motion / Rexroth lineage). It has accumulated significant installed base across global heavy industry sectors including chemical processing plants, nuclear auxiliary systems, oil refinery conveyance lines, and continuous web-handling machinery. The CDB34 platform is characterized by its integrated motion controller architecture, which consolidates position control, velocity loop, and current regulation into a single compact housing — reducing panel footprint and simplifying commissioning in space-constrained control cabinets. Its deployment in safety-critical and continuous-process environments has made long-term parts availability a primary concern for maintenance engineers worldwide.

The Evolution of CDB34 Architecture

The CDB34 series was introduced as part of LUST's second-generation compact drive family, succeeding the CDA and CDB3x platforms. Early CDB34 variants (circa late 1990s–early 2000s) supported RS-232/RS-485 serial communication and basic analog ±10V command interfaces. Mid-generation revisions introduced CANopen and PROFIBUS-DP fieldbus options, enabling integration into distributed control architectures common in PLC-based SCADA environments. The suffix coding system encodes the full hardware configuration: current rating (e.g., 014 = 1.4A continuous), voltage class (W2 = 230VAC single/three-phase), feedback type (BR = resolver, SH = SinCos encoder), operating mode (OL = open-loop capable), and feature set (HF = high-frequency PWM). Later production runs added enhanced EMC filtering and UL/CE dual certification. As the CDB34 series has entered its end-of-life and obsolescence phase, no direct drop-in successor exists within the LUST/LTI catalog; migration paths typically involve the LTI CDD3000 or Rexroth IndraDrive Cs series, requiring full re-parameterization and mechanical adapter brackets.

CDB34 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the CDB34 series. Each unit is a self-contained servo amplifier unless otherwise noted.

CDB34.014.W2.4.BR.SH.OL.HF: 1.4A cont., 230V, resolver+SinCos, open-loop/HF PWM mode
CDB34.014.W2.4.BR.OL: 1.4A cont., 230V, resolver feedback, standard open-loop variant
CDB34.014.W2.4.SH.OL: 1.4A cont., 230V, SinCos encoder, open-loop configuration
CDB34.024.W2.4.BR.SH.OL.HF: 2.4A cont., 230V, resolver+SinCos, open-loop/HF PWM
CDB34.024.W2.4.BR.OL: 2.4A cont., 230V, resolver feedback, standard open-loop
CDB34.024.W2.4.SH.OL: 2.4A cont., 230V, SinCos encoder, open-loop
CDB34.040.W2.4.BR.SH.OL.HF: 4.0A cont., 230V, resolver+SinCos, open-loop/HF PWM
CDB34.040.W2.4.BR.OL: 4.0A cont., 230V, resolver feedback, standard open-loop
CDB34.040.W2.4.SH.OL: 4.0A cont., 230V, SinCos encoder, open-loop
CDB34.060.W2.4.BR.SH.OL.HF: 6.0A cont., 230V, resolver+SinCos, open-loop/HF PWM
CDB34.060.W2.4.BR.OL: 6.0A cont., 230V, resolver feedback, standard open-loop
CDB34.014.W4.4.BR.SH.OL.HF: 1.4A cont., 400V three-phase, resolver+SinCos, HF PWM
CDB34.024.W4.4.BR.SH.OL.HF: 2.4A cont., 400V three-phase, resolver+SinCos, HF PWM
CDB34.040.W4.4.BR.SH.OL.HF: 4.0A cont., 400V three-phase, resolver+SinCos, HF PWM
CDB34.060.W4.4.BR.SH.OL.HF: 6.0A cont., 400V three-phase, resolver+SinCos, HF PWM
CDB34.014.W2.4.IN.OL: 1.4A cont., 230V, incremental encoder (TTL), open-loop
CDB34.024.W2.4.IN.OL: 2.4A cont., 230V, incremental encoder (TTL), open-loop
CDB34.040.W2.4.IN.OL: 4.0A cont., 230V, incremental encoder (TTL), open-loop

Sourcing Hard-to-Find & Obsolete CDB34 Parts

The CDB34 series has been formally discontinued by LTI Motion. OEM spare stock is depleted at most authorized distribution channels. DriveKNMS maintains a dedicated obsolete-parts inventory program for the CDB34 platform, sourcing units from decommissioned plant equipment, verified surplus channels, and controlled factory-refurbishment pipelines. For facilities operating CDB34 drives in long-lifecycle applications (10–25 year plant horizons), DriveKNMS provides: (1) unit-level exchange programs where a failed drive is replaced with a tested equivalent, (2) cross-reference consultation to identify compatible substitute models where exact replacements are unavailable, and (3) bulk reservation agreements for maintenance departments requiring guaranteed stock over multi-year service contracts. All sourced units are accompanied by full traceability documentation and test records.

Quality Control for the CDB34 Range

CDB34 drives incorporate a multi-layer internal bus architecture connecting the power stage, DSP control board, and feedback interface card. Standard incoming inspection at DriveKNMS includes: (1) visual inspection of PCB assemblies for capacitor bulge, corrosion, and solder joint integrity; (2) powered bench test under no-load conditions verifying DC bus regulation, PWM output symmetry, and fault relay function; (3) feedback interface verification using a reference resolver or SinCos encoder signal source to confirm signal conditioning accuracy; (4) communication port validation via RS-232/CANopen loopback test; (5) thermal cycling to confirm gate driver and IGBT module stability across operating temperature range (0–45°C ambient). Units that fail any stage are quarantined and not offered for resale. Test records are retained for 36 months and available upon request.