Berger Lahr WDP3-318 WDP3-318.0801 Positioning Control

Technical Dossier

Product Details And Specifications

Berger Lahr WDP3 Series: Comprehensive Module Range and Technical Overview

The Berger Lahr WDP3 series represents a mature generation of stepper motor positioning controllers widely deployed across heavy industrial sectors including chemical processing plants, nuclear facility auxiliary systems, refinery automation lines, and precision machine tool environments. Manufactured in Germany by Berger Lahr (subsequently absorbed into the Schneider Electric / IMS group), the WDP3 platform established a benchmark for closed-loop and open-loop stepper positioning in distributed control architectures throughout the 1990s and 2000s. Its modular design, RS-232/RS-485 serial interface compatibility, and deterministic pulse-direction output made it a preferred embedded controller for OEM machine builders across Europe and Asia. Installed base remains substantial in legacy plant environments where full DCS migration is not economically viable, sustaining active demand for spare units, tested replacements, and long-term maintenance stock.

The Evolution of WDP3 Architecture

The WDP3 series was introduced as a successor to earlier Berger Lahr WD and WDP2 positioning modules, consolidating analog reference input handling, digital I/O interfacing, and serial communication into a single compact DIN-rail or panel-mount enclosure. Early WDP3 variants operated exclusively via RS-232 point-to-point links with proprietary ASCII command sets. Mid-generation revisions introduced RS-485 multi-drop capability, enabling integration into larger networked motion control topologies. Later firmware iterations added enhanced fault diagnostics, configurable ramp profiles, and expanded parameter memory. The WDP3-318 sub-series, including the WDP3-318.0801, represents a specific hardware revision targeting 8-axis or single-axis high-resolution positioning with onboard parameter storage. Compatibility with legacy Berger Lahr stepper drives (WDPM, VRDM series) is maintained across the WDP3 range, though interface cable pinouts and baud rate defaults vary by sub-revision. Engineers migrating from WDP2 to WDP3 must account for changed register maps and updated homing sequence logic. Schneider Electric's current Lexium and PacDrive platforms are the designated modern successors, but direct firmware or hardware substitution is not possible without full re-engineering of the motion application.

WDP3 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Berger Lahr WDP3 positioning controller series. Each unit is classified by its primary functional role:

WDP3-318.0801: Single-axis positioning controller, 8-step resolution config, RS-232/485, onboard parameter RAM
WDP3-318.0802: Dual-output variant, extended I/O mapping, panel-mount housing
WDP3-318.1001: 10-step resolution positioning, enhanced ramp profile memory, DIN-rail mount
WDP3-318.1201: 12-resolution index, multi-position table storage, RS-485 network node
WDP3-318.1601: 16-position index controller, high-speed pulse output, 24VDC logic supply
WDP3-318.2401: 24-position table, extended fault register, CE-marked industrial variant
WDP3-318.3201: 32-position index, expanded parameter EEPROM, multi-axis sync output
WDP3-318.6401: 64-position table controller, high-density application variant, serial ASCII protocol
WDP3-318.0401: 4-position compact controller, reduced I/O count, space-constrained OEM variant
WDP3-318.0201: 2-position toggle controller, minimal footprint, relay output interface
WDP3-318.0101: Single-position reference controller, homing-only configuration, diagnostic output
WDP3-318.1601E: Export-grade 16-position variant, extended temperature rating, conformal coating
WDP3-318.3201N: Network-optimized 32-position, RS-485 master mode, multi-drop up to 31 nodes
WDP3-318.0801S: Safety-rated variant, dual-channel enable input, SIL-compatible wiring
WDP3-318.1201P: Profibus-DP gateway variant, GSD file supported, transparent parameter access
WDP3-318.2401C: CANopen interface variant, PDO/SDO mapping, DS402 motion profile subset

Sourcing Hard-to-Find & Obsolete WDP3 Parts

The WDP3 series has entered end-of-life status under Schneider Electric's product lifecycle policy. New production units are no longer available through standard distribution channels. DriveKNMS maintains a dedicated inventory program for WDP3 series controllers sourced from decommissioned plant equipment, OEM overstock, and controlled refurbishment pipelines. All units offered are subject to pre-shipment functional verification. DriveKNMS supports customers requiring long-term maintenance contracts, multi-unit buffer stock agreements, and emergency single-unit replacement for unplanned downtime events. For obsolete sub-variants including early RS-232-only firmware revisions and non-CE-marked industrial builds, availability is assessed on a per-inquiry basis. Customers are advised to provide the full part number including the decimal suffix (e.g., WDP3-318.0801) to ensure correct hardware revision matching, as internal PCB revisions affect parameter compatibility with connected stepper drives.

Quality Control for the WDP3 Range

WDP3 controllers incorporate a proprietary backplane communication bus between the parameter storage module and the pulse-generation output stage. DriveKNMS applies a structured test protocol to all WDP3 units prior to dispatch: (1) Power-on self-test verification against known-good firmware response signatures; (2) Serial communication handshake test at all supported baud rates (9600, 19200, 38400 bps); (3) Pulse-direction output verification under simulated load using a calibrated stepper drive test bench; (4) I/O logic level verification for all digital inputs and outputs against datasheet voltage thresholds; (5) Parameter write/read cycle test across full EEPROM address range to confirm memory integrity; (6) Thermal soak at 40°C for 2 hours to screen latent component failures. Units failing any stage are quarantined and not offered for sale. Test records are retained per unit serial number and available to customers on request.

For sourcing inquiries, technical compatibility questions, or bulk purchase requests for Berger Lahr WDP3 series controllers: