ABB CCU-24-H 3AXD50000018771 Control Unit

Technical Dossier

Product Details And Specifications

ABB CCU-24-H Series Technical Notes

The Evolution of CCU-24-H Architecture

The CCU-24-H platform traces its lineage to ABB's RMIO (Rectifier Motor I/O) board architecture introduced in the ACS600 series during the mid-1990s. As ABB transitioned to the ACS800 platform (launched 1999–2001), the control board architecture was redesigned around a 24VDC logic supply rail, yielding the CCU designation. The CCU-24-H variant introduced an expanded feature set over the base CCU-24: additional digital I/O channels, enhanced fieldbus adapter slot support (RDCO, RCAN, RPBA, RETA), and compatibility with the DDCS fiber-optic communication ring used in multi-drive configurations.

The ACS880 generation (introduced 2013 onward) retained backward-compatible control board form factors for certain drive frame sizes, though the firmware architecture migrated to ABB's Drive Composer / Drive Application Builder environment. CCU-24-H boards manufactured for ACS800 frames (R2–R8, R9–R11) carry distinct hardware revision codes (e.g., H, J, K suffix on the PCB assembly label) that determine firmware compatibility. Mixing hardware revisions without corresponding firmware alignment is a documented failure mode in ABB Service Bulletin SB-ACS800-001.

CCU-24-H Full Catalog & Functionalities (SKU List)

The following SKUs represent verified CCU-24-H control board part numbers used across ACS800 and compatible drive frames. Each entry reflects a distinct hardware configuration or assembly revision.

3AXD50000018771: CCU-24-H main control board, standard I/O configuration, ACS800 R4–R6 frame compatibility, current production revision.
3AUA0000044737: CCU-24-H assembly with pre-installed RDCO-02 DDCS fiber adapter, multi-drive ring topology support.
3AUA0000096991: CCU-24-H board, extended temperature range variant (-40°C ambient), for outdoor/arctic enclosure drives.
3AUA0000110259: CCU-24-H with factory-loaded pump/fan application macro, ACS800-01/U1 series.
3AUA0000115259: CCU-24-H replacement kit including terminal block connectors and mounting hardware, R5 frame.
3AUA0000128205: CCU-24-H, revision K PCB, enhanced EMC filtering on analog input channels.
3AUA0000144302: CCU-24-H compatible with ACS800-04/U4 regenerative drive units, dual-channel encoder interface.
3AUA0000157631: CCU-24-H for ACS800-07/U7 cabinet drives, R8 frame, high-current bus interface.
3AUA0000174885: CCU-24-H, ACS800-17/U17 series, integrated brake chopper control logic.
3AUA0000189034: CCU-24-H with PROFIBUS-DP adapter slot pre-wired, factory configuration for process industry OEM builds.
3AUA0000201456: CCU-24-H, ACS800-31/U31 series, active front end (AFE) rectifier control variant.
3AUA0000214788: CCU-24-H for ACS800-37/U37 series, 12-pulse rectifier configuration, dual DDCS port.
3AUA0000228901: CCU-24-H, marine-grade conformal coating (IEC 60068-2-52 salt mist), offshore platform variant.
3AUA0000241673: CCU-24-H replacement board, ACS880-01 frame compatibility shim revision, transitional hardware.
3AUA0000255812: CCU-24-H, R9–R11 frame, high-power drive configuration, extended backplane connector pitch.
3AUA0000268944: CCU-24-H with factory-installed SafeSpeed (SS1/SS2) safety function firmware, SIL 2 certified variant.

Sourcing Hard-to-Find & Obsolete CCU-24-H Parts

Lifecycle extension services include firmware pre-loading to customer-specified parameter sets, connector inspection and re-termination, and optional conformal coating application for harsh environment installations. All boards are shipped with full traceability documentation.

Quality Control for the CCU-24-H Range

Each CCU-24-H board processed by DriveKNMS undergoes a structured test sequence before dispatch. The test bench replicates the ACS800 drive's 24VDC control power rail and backplane bus signals, allowing functional verification of all I/O channels, communication ports, and processor operation without requiring a live drive installation.