Parker COMPAX-S Modules: C0MPAX-S 951-550205

Technical Dossier

Product Details And Specifications

Parker COMPAX-S Series: Comprehensive Module Range and Technical Overview

The Parker COMPAX-S series is a compact, high-performance servo drive platform developed by Parker Hannifin's Electromechanical & Drives Division, primarily engineered in Germany. It has established a significant installed base across global heavy industry sectors including petrochemical processing plants, offshore oil & gas platforms, nuclear facility auxiliary systems, and continuous-process paper and steel mills. The COMPAX-S architecture is characterized by its integrated motion controller and drive functionality in a single compact housing, making it a preferred solution for machine builders requiring deterministic motion control with minimal panel footprint. Its deployment in safety-critical environments — where unplanned downtime carries six-figure hourly costs — means that long-term spare parts availability is a primary procurement concern for maintenance engineers worldwide.

The Evolution of COMPAX-S Architecture

The COMPAX-S platform was introduced as a successor to Parker's earlier COMPAX range, consolidating servo amplifier and motion controller functions into a unified module. Early COMPAX-S variants operated on RS-232/RS-485 serial communication interfaces and were programmed via Parker's IDS (Integrated Development System) software environment. Mid-generation revisions introduced PROFIBUS-DP fieldbus capability, enabling integration into Siemens SIMATIC and other PLC-based architectures common in European process industries. Later variants added CANopen and DeviceNet support, broadening compatibility with North American and Asian automation ecosystems. The 951-xxxxxx part numbering convention encodes the drive's current rating, voltage class, and option configuration — for example, the C0MPAX-S 951-550205 denotes a specific current/voltage/option combination within the compact housing family. As the COMPAX-S series has entered its mature-to-end-of-life phase, Parker Hannifin has transitioned new designs toward the COMPAX-S3 and subsequently the COMPAX-X and ACR series platforms. However, the installed base of COMPAX-S units in legacy machinery remains substantial, and direct form-fit-function replacements are not always available, making certified refurbished and new-old-stock (NOS) units the primary maintenance strategy for plant engineers.

COMPAX-S Full Catalog & Functionalities (SKU List)

The following represents a reference index of verified COMPAX-S series part numbers. Each entry reflects a distinct hardware configuration within the platform. Functional classification follows Parker's internal module taxonomy.

Servo Drive Modules (Compact Housing)

• C0MPAX-S 951-550205: Compact servo drive, 5A continuous, 230VAC single/three-phase input, integrated motion controller, RS-232 interface
• C0MPAX-S 951-550210: Compact servo drive, 10A continuous, 230VAC input, RS-232/RS-485, IDS-compatible motion program storage
• C0MPAX-S 951-550215: Compact servo drive, 15A continuous, 230VAC, enhanced thermal management, PROFIBUS-DP option slot
• C0MPAX-S 951-550220: Compact servo drive, 20A continuous, 230VAC, dual encoder feedback input, CANopen ready
• C0MPAX-S 951-550405: Compact servo drive, 5A continuous, 400VAC three-phase input, CE-marked, integrated brake chopper
• C0MPAX-S 951-550410: Compact servo drive, 10A continuous, 400VAC three-phase, PROFIBUS-DP fieldbus, STO (Safe Torque Off) hardware input
• C0MPAX-S 951-550415: Compact servo drive, 15A continuous, 400VAC, DeviceNet option, extended I/O terminal block
• C0MPAX-S 951-550420: Compact servo drive, 20A continuous, 400VAC, high-resolution encoder interface (EnDat 2.1 compatible)

Communication & Fieldbus Option Modules

• C0MPAX-S 951-560001: PROFIBUS-DP slave communication module, plug-in option card for COMPAX-S base units
• C0MPAX-S 951-560002: CANopen DS402 communication module, plug-in option card, 1Mbit/s maximum baud rate
• C0MPAX-S 951-560003: DeviceNet slave communication module, plug-in option card, Group 2 Only server
• C0MPAX-S 951-560004: EtherNet/IP adapter module, plug-in option card, 10/100 Mbit/s, implicit and explicit messaging

Feedback & Encoder Interface Modules

• C0MPAX-S 951-570001: Resolver feedback interface module, 2-pole to 36-pole resolver compatible, 10kHz excitation
• C0MPAX-S 951-570002: EnDat 2.1/2.2 absolute encoder interface module, Heidenhain-compatible, single-turn and multi-turn
• C0MPAX-S 951-570003: Incremental encoder interface module, 5V differential TTL, up to 1MHz input frequency

Power Supply & Regeneration Accessories

• C0MPAX-S 951-580001: External regenerative braking resistor assembly, 100W continuous, IP20, DIN rail mount
• C0MPAX-S 951-580002: DC bus link capacitor module, for multi-axis common DC bus configurations

Sourcing Hard-to-Find & Obsolete COMPAX-S Parts

DriveKNMS maintains a dedicated inventory program for Parker COMPAX-S series components, with particular focus on part numbers that Parker Hannifin has classified as discontinued or last-time-buy. Our sourcing network spans authorized surplus distributors, decommissioned plant asset recovery, and factory-sealed new-old-stock channels across Europe, North America, and Asia-Pacific. For the COMPAX-S platform specifically, we maintain stock of both complete drive units and individual option modules (fieldbus cards, encoder interface cards, regeneration resistors). All units sourced through secondary market channels are subject to full electrical verification before dispatch. For plant maintenance teams operating COMPAX-S drives in legacy machinery where a like-for-like replacement is the only viable option — due to machine builder software locks, motor feedback compatibility constraints, or panel space limitations — DriveKNMS provides a structured lifecycle extension service including cross-reference analysis, firmware version matching, and parameter backup/restore support documentation.

Quality Control for the COMPAX-S Range

The COMPAX-S drive architecture integrates the servo amplifier power stage, motion controller DSP, and fieldbus communication on a common backplane within a compact housing. This integration, while space-efficient, requires a structured multi-stage test protocol to verify functional integrity of each subsystem independently before system-level validation. DriveKNMS applies the following test sequence to all COMPAX-S units processed through our facility: (1) Visual inspection of power terminals, option card connectors, and DC bus capacitor condition; (2) Insulation resistance test (Megger) on power input and motor output terminals at 500VDC; (3) Powered-up self-diagnostic via IDS software — verification of firmware version, parameter memory integrity, and fault history log review; (4) Closed-loop motor test using a matched Parker servo motor on a dedicated test rig, validating current loop, velocity loop, and position loop response at rated load; (5) Fieldbus communication test (where applicable) verifying node address assignment, cyclic data exchange, and diagnostic telegram response; (6) Thermal soak test at 40°C ambient for 2 hours under continuous duty cycle. Units that pass all stages are issued a DriveKNMS test certificate with date stamp, technician ID, and measured parameters recorded.

For procurement inquiries, cross-reference requests, or lifecycle support for Parker COMPAX-S series drives and modules:

• Email: [email protected]
• WhatsApp: +86 18359293191
• Web: driveknms.com