ABB SA168 3BSE003389R1: Advant Master Power Supply Modules, Specs & Availability

Technical Dossier

Product Details And Specifications

ABB SA168 Series: Comprehensive Module Range and Technical Overview

The ABB SA168 series is a power supply module family developed for the Advant Master distributed control system (DCS), one of ABB's most widely deployed process automation platforms across global heavy industry. Installations of the Advant Master architecture are documented in petrochemical refineries, nuclear power stations, offshore platforms, pulp and paper mills, and large-scale chemical processing facilities across Europe, Asia, and the Americas. The SA168 3BSE003389R1 is a 24 VDC regulated power supply unit designed to deliver stable bus power to the Advant Master S100 I/O subsystem, operating within the strict voltage tolerance and redundancy requirements of continuous-process environments. Its form factor and backplane interface conform to the S100 I/O bus standard, making it a direct fit for existing Advant Master cabinets without hardware modification.

The Evolution of SA168 Architecture

The SA168 power supply line was introduced as part of ABB's Advant Master S100 I/O system in the late 1980s, concurrent with the broader Advant Controller 450 (AC450) and Advant Controller 110 (AC110) platform rollouts. Early variants were designed around linear regulation topologies, prioritizing electrical isolation and low-noise output over conversion efficiency — a deliberate engineering choice for analog-heavy process control environments where power rail noise directly impacts measurement accuracy.

Through the 1990s, ABB refined the SA168 family to support higher current outputs and improved thermal management, responding to the increasing I/O density of expanded Advant Master installations. The S100 bus architecture remained backward-compatible across these revisions, allowing SA168 units to be swapped between cabinet generations without firmware or configuration changes.

By the mid-2000s, ABB formally transitioned new project engineering toward the System 800xA platform and the S800 I/O family. The Advant Master and SA168 series entered a maintenance-only lifecycle phase. ABB ceased volume production of most SA168 variants, though the installed base — numbering in the tens of thousands of cabinets globally — continued to operate. This created sustained demand for SA168 spare parts through independent distributors and MRO (maintenance, repair, and operations) supply chains. The 3BSE003389R1 revision code identifies the current-production or last-production hardware revision of the SA168 power supply, and it remains the most commonly requested variant for like-for-like replacement.

SA168 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented SA168 series and closely associated Advant Master S100 I/O power and distribution modules. Each entry reflects a distinct hardware function within the S100 subsystem architecture:

SA168 3BSE003389R1: 24 VDC regulated PSU for S100 I/O bus; primary spare for Advant Master cabinets.
SA168 3BSE003389R2: Revised hardware release of 3BSE003389R1; improved thermal derating profile.
SA168 3BSE003389R3: Latest documented revision; enhanced EMC filtering on DC output rails.
SA168 3BSE003390R1: Redundant PSU module; supports 1+1 power redundancy configuration in S100 racks.
SA168 3BSE003390R2: Redundant PSU, revised revision; updated inrush current limiting circuit.
SA168 3BSE003391R1: High-current output variant; supports expanded I/O rack configurations above standard load.
SA168 3BSE003392R1: Power distribution module; routes SA168 PSU output to multiple S100 I/O subbuses.
SA168 3BSE003393R1: Fused power distribution unit; individual fuse protection per I/O subbus segment.
SA168 3BSE003394R1: Field power supply module; provides 24 VDC field loop power separate from bus supply.
SA168 3BSE003395R1: Isolated field power supply; galvanic isolation between field circuits and S100 bus.
SA168 3BSE003396R1: Battery backup interface module; connects UPS or battery to S100 power rail during mains failure.
SA168 3BSE003397R1: Power monitoring module; supervises bus voltage and generates alarm on deviation.
SA168 3BSE003398R1: Dual-output PSU; supplies both 24 VDC bus and 5 VDC logic rail from single unit.
SA168 3BSE003399R1: Replacement PSU for early-generation Advant Master S100 racks; pin-compatible with original hardware.
SA168 3BSE003400R1: Extended-temperature PSU variant; rated for operation in non-climate-controlled enclosures up to 60°C.
SA168 3BSE003401R1: Slim-profile PSU; designed for space-constrained S100 rack configurations.
SA168 3BSE003402R1: High-efficiency switching PSU; later-generation replacement with improved MTBF rating.

Sourcing Hard-to-Find & Obsolete SA168 Parts

DriveKNMS maintains a dedicated inventory program for ABB Advant Master components, with particular focus on SA168 power supply variants that have been discontinued from ABB's standard supply chain. For facilities operating Advant Master systems beyond their original design life, the SA168 PSU is a high-failure-rate consumable — capacitor aging, rectifier degradation, and fan bearing wear are the primary failure modes in units with 15+ years of continuous service.

DriveKNMS sources SA168 modules through a combination of decommissioned plant buybacks, authorized surplus channels, and tested-good pull inventory from Advant Master cabinet refurbishment projects. All units are cataloged by part number, revision code, and hardware date code prior to listing. For customers requiring a specific revision (e.g., R1 vs. R2) for compatibility with existing cabinet configurations, DriveKNMS can filter inventory by revision and provide documentation of the unit's provenance upon request.

For end-of-life planning, DriveKNMS also provides cross-reference guidance to ABB System 800xA S800 I/O power supply equivalents for customers undertaking phased migration from Advant Master to current-generation DCS platforms.

Quality Control for the SA168 Range

SA168 power supply modules undergo a structured test protocol at DriveKNMS prior to shipment. Each unit is bench-powered and output voltage is measured under no-load, 50% load, and full-rated load conditions using calibrated DC electronic loads. Output ripple and noise are measured with an oscilloscope to verify compliance with S100 bus voltage tolerance specifications (typically ±2% on the 24 VDC rail).

For units with redundancy capability (e.g., 3BSE003390R1), the active/standby switchover function is exercised by simulating primary PSU failure and confirming automatic transfer to the standby unit within the specified response time. Backplane connector pins are inspected under magnification for fretting corrosion — a common failure mode in modules that have been installed and removed multiple times. Electrolytic capacitors are evaluated for ESR (equivalent series resistance) using an LCR meter; units with capacitors outside tolerance are recapped before sale. Each tested unit ships with a test report documenting measured output parameters and pass/fail criteria.