Komax CPU2000 Modules: CPU2000.G400R04 Inverter SBP Encoder Board —

Technical Dossier

Product Details And Specifications

Komax CPU2000 Series: Comprehensive Module Range and Technical Overview

The Komax CPU2000 series represents a mature, field-proven platform deployed across heavy industrial sectors including chemical processing plants, nuclear power facilities, petroleum refineries, and large-scale manufacturing lines. The series encompasses inverter drive control boards, encoder feedback modules, signal processing units, and auxiliary interface cards designed for high-reliability continuous-duty environments. Installed base across Europe, Asia, and the Middle East remains substantial, making lifecycle parts support a critical operational requirement for plant maintenance teams.

The Evolution of CPU2000 Architecture

The CPU2000 platform was developed as a modular inverter control architecture, enabling field-replaceable board-level components rather than full drive replacement. Early revisions of the series used parallel backplane communication with discrete signal conditioning per axis. Subsequent generations introduced serial encoder feedback interfaces (SBP — Serial Bus Protocol), reducing wiring complexity and improving noise immunity in high-EMI industrial environments.

The CPU2000.G400R04 represents the SBP encoder board variant within the G400 sub-family, designed to interface resolver or incremental encoder signals from the motor shaft back to the main inverter control CPU. This architecture is common in wire processing machinery, winding equipment, and precision motion control applications where Komax drives are integrated into automated production lines.

Compatibility considerations: CPU2000 boards are generation-specific. G400-series boards are not directly interchangeable with earlier G200 or G300 variants without firmware and parameter verification. Replacement of encoder boards requires re-commissioning of encoder offset parameters via the drive's commissioning software.

CPU2000 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Komax CPU2000 inverter drive platform, organized by functional category:

Encoder & Feedback Interface Boards

• CPU2000.G400R04: SBP serial encoder interface board for G400-series inverter, resolver/incremental encoder input, current product on this page.
• CPU2000.G400R03: Prior revision SBP encoder board, G400 platform, functionally equivalent with earlier firmware baseline.
• CPU2000.G300R02: Encoder feedback board for G300-series inverter drives, parallel interface architecture, predecessor to SBP design.
• CPU2000.G200R01: First-generation encoder interface card, G200 platform, discrete signal conditioning, now obsolete.

Main CPU / Control Boards

• CPU2000.G400C01: Main inverter control CPU board, G400 platform, DSP-based motion control, CAN/SBP communication master.
• CPU2000.G400C02: Revised main CPU board with extended memory and enhanced diagnostic logging capability.
• CPU2000.G300C01: Main control board for G300-series drives, earlier DSP generation, limited fieldbus options.
• CPU2000.G200C01: Legacy main CPU board, G200 platform, analog reference input, no fieldbus support.

Power Supply & Gate Drive Boards

• CPU2000.G400P01: Auxiliary power supply board, G400 platform, generates ±15V and +5V logic rails for control electronics.
• CPU2000.G400G01: IGBT gate drive interface board, G400 platform, isolated gate signal distribution to power stage.
• CPU2000.G300P01: Power supply board for G300-series, earlier topology, compatible with G300 chassis only.

I/O & Interface Modules

• CPU2000.G400I01: Digital I/O expansion board, G400 platform, 16DI/8DO, 24VDC logic, terminal block interface.
• CPU2000.G400A01: Analog I/O board, G400 platform, 4x ±10V analog inputs, 2x analog outputs, 12-bit resolution.
• CPU2000.G400F01: Fieldbus communication adapter board, G400 platform, PROFIBUS-DP slave interface.
• CPU2000.G400F02: CANopen communication adapter board, G400 platform, DS402 drive profile support.
• CPU2000.G400F03: EtherCAT communication adapter board, G400 platform, CoE (CANopen over EtherCAT) protocol.

Sourcing Hard-to-Find & Obsolete CPU2000 Parts

The Komax CPU2000 series has entered the mature-to-declining phase of its product lifecycle. Komax AG has progressively reduced factory stock availability for earlier G200 and G300 sub-family components. For plants operating legacy Komax inverter systems, unplanned board failures present significant production risk when OEM channels cannot supply replacement parts within acceptable lead times.

DriveKNMS maintains a dedicated inventory of CPU2000 series boards sourced through verified industrial surplus and decommissioned equipment channels. Stock is inspected, tested, and catalogued by part number and revision level. For obsolete variants such as CPU2000.G200R01, CPU2000.G300C01, and CPU2000.G300P01, DriveKNMS provides lifecycle extension support including cross-reference analysis to identify compatible replacement options where direct substitution is not available.

Customers operating Komax CPU2000 drives in critical continuous-process environments are advised to establish a strategic spare parts buffer. DriveKNMS can assist with bill-of-materials (BOM) analysis and recommended stocking levels based on installed drive count and criticality classification.

Quality Control for the CPU2000 Range

CPU2000 series boards present specific test challenges due to their integrated SBP serial communication bus, DSP-based control architecture, and multi-rail power supply dependencies. DriveKNMS applies the following test protocol to all CPU2000 inventory:

• Visual inspection: Component-level examination for capacitor degradation, solder joint integrity, and connector pin condition.
• Power rail verification: All supply voltages measured under load against OEM specification tolerances before functional test.
• SBP communication test: Encoder board variants including CPU2000.G400R04 are tested for serial bus signal integrity using a dedicated Komax-compatible test fixture that simulates encoder feedback signals.
• DSP firmware verification: Main CPU boards are verified for correct firmware version and parameter memory integrity.
• Burn-in cycle: Boards are subjected to a thermal cycling burn-in period to screen for latent component failures prior to shipment.
• Final functional test: Where test rigs permit, boards are validated in a representative drive assembly under simulated load conditions.

All tested units are issued a DriveKNMS inspection report documenting test results, revision level, and warranty terms.