ABB UAD141 Modules – 3BHE012095R0002 UAD141A02 Power Supply

Technical Dossier

Product Details And Specifications

ABB UAD141 Series Technical Notes

The Evolution of UAD141 Architecture

The UAD141 designation traces its lineage to the ABB Asea Brown Boveri Harmony DCS platform, introduced in the late 1980s and progressively evolved through the Symphony and Symphony Plus generations. Early UAD141 variants were designed for the INFI-90 and Harmony H-series cabinets, providing 24 VDC and 48 VDC rail power to IMMFP, IMDSO, and IMASI module families. As ABB transitioned to the Symphony Plus architecture in the 2000s, the UAD141 form factor was retained for backward compatibility, while internal power conversion topologies were updated to meet IEC 61131-2 and IEC 61000-4 EMC immunity standards. The AC800M integration introduced stricter requirements for power sequencing and hot-swap capability, reflected in later UAD141 sub-variants. Current production units carry CE, UL, and cUL certifications. The series is now in a mature/end-of-active-production lifecycle phase; ABB continues to offer spare parts support under its Extended Lifecycle Program, but new design-ins are directed toward the Symphony Plus SD Series power infrastructure. Facilities maintaining legacy Symphony Harmony cabinets must source UAD141 units through authorized spare parts channels or certified third-party suppliers to sustain operational continuity.

UAD141 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly referenced part numbers within the ABB UAD141 power supply and distribution module family. Each entry reflects a distinct hardware configuration or revision level.

3BHE012095R0002 UAD141A02: 24 VDC regulated power supply module, Symphony Plus cabinet rail, dual-output configuration, current revision A02.
3BHE012095R0001 UAD141A01: 24 VDC power supply, initial production revision A01, functionally equivalent to R0002 with earlier PCB layout.
3BHE012095R0003 UAD141A03: 24 VDC power supply, revision A03, updated EMC filtering and improved thermal derating curve.
3BHE004573R0001 UAD141B01: 48 VDC output variant, designed for high-current I/O bus segments in large Symphony Plus cabinets.
3BHE004573R0002 UAD141B02: 48 VDC output, revision B02, enhanced short-circuit protection and soft-start circuitry.
3BHE023584R0001 UAD141C01: Redundant power supply module, supports 1+1 hot-standby configuration on Symphony Plus power bus.
3BHE023584R0002 UAD141C02: Redundant power supply, revision C02, improved switchover time under load transient conditions.
3BHE031245R0001 UAD141D01: Power distribution module, 8-channel fused output, 24 VDC, for field device loop power distribution.
3BHE031245R0002 UAD141D02: Power distribution, revision D02, added individual channel status LED indicators.
3BHE041872R0001 UAD141E01: Wide-input AC/DC power supply, 85–264 VAC input, 24 VDC output, for non-UPS-backed cabinet segments.
3BHE041872R0002 UAD141E02: Wide-input AC/DC, revision E02, updated inrush current limiting for cold-start conditions.
3BHE052310R0001 UAD141F01: Battery-backed power supply module, integrated 72-hour ride-through buffer for critical controller segments.
3BHE052310R0002 UAD141F02: Battery-backed, revision F02, lithium-ion cell replacement, extended service interval to 5 years.
3BHE063491R0001 UAD141G01: Power monitoring module, measures voltage, current, and power factor on Symphony Plus DC bus, PROFIBUS DP interface.
3BHE063491R0002 UAD141G02: Power monitoring, revision G02, added Modbus RTU secondary interface and expanded data logging buffer.
3BHE074820R0001 UAD141H01: High-density power supply, 40 A continuous output, for large-scale I/O expansion cabinets in refinery DCS installations.

Quality Control for the UAD141 Range

UAD141 power supply modules present specific test challenges due to their role in backplane power distribution and their interaction with the Symphony Plus bus architecture. DriveKNMS applies the following test protocol to all UAD141 units prior to shipment: (1) Visual inspection of PCB, capacitor banks, and connector pins under 10× magnification; (2) Powered bench test at rated input voltage with calibrated DC load bank, verifying output voltage regulation within ±1% across 10%–100% load range; (3) Ripple and noise measurement per IEC 61131-2 Section 6.4, maximum 200 mV peak-to-peak; (4) Thermal imaging under full load for 30 minutes to identify failing components not visible during static inspection; (5) Functional backplane integration test using a reference Symphony Plus cabinet segment to verify bus communication handshake and power sequencing behavior; (6) Final output parameter logging with calibration certificate issued for each unit. Units failing any stage are quarantined and not returned to inventory.