ABB SPTU Series Modules: SPTU 240 R1 / SPTU240R1 Power Supply Module

Technical Dossier

Product Details And Specifications

ABB SPTU Series Technical Notes

The Evolution of SPTU Architecture

The SPTU series was introduced as part of ABB's Advant OCS (Open Control System) strategy, designed to standardize power distribution and I/O termination across the S100 bus. Early revisions (R0, R1) used discrete linear regulation components and passive backplane connectors. Subsequent revisions introduced improved EMC filtering, wider input voltage tolerance, and enhanced short-circuit protection. The SPTU 240 R1 specifically targets 24 VDC field supply applications with a 240 mA output rating, making it a standard building block in distributed I/O cabinets.

Compatibility across revisions is generally maintained at the backplane connector level, but firmware-dependent modules (such as communication adapters) require revision-matched replacements. As ABB transitioned to the System 800xA platform, the SPTU series entered end-of-life status. ABB ceased active production of most SPTU variants by the mid-2010s, shifting support to the 800xA S800 I/O family. Sites running legacy Advant systems must now source SPTU modules from certified aftermarket suppliers to maintain operational continuity.

SPTU Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly referenced modules within the ABB SPTU and associated Advant S100 power/termination range. Each entry reflects a distinct hardware function within the system architecture.

SPTU 240 R1 (SPTU240R1): 24 VDC / 240 mA regulated field power supply module, S100 bus mount.
SPTU 120 R1 (SPTU120R1): 24 VDC / 120 mA field supply module, reduced-current variant for low-load I/O groups.
SPTU 480 R1 (SPTU480R1): 24 VDC / 480 mA high-current field power supply for dense I/O configurations.
SPTU 240 R0 (SPTU240R0): First-revision 240 mA field supply; predecessor to R1, functionally equivalent with earlier PCB layout.
SPTD 240 R1 (SPTD240R1): Dual-channel 24 VDC power distribution module with independent fusing per channel.
SPTU 24 R1 (SPTU24R1): 24 VDC termination unit for analog I/O modules within the S100 bus segment.
SPTU 48 R1 (SPTU48R1): 48 VDC field supply termination unit for telecom-standard field devices.
SPTU 110 R1 (SPTU110R1): 110 VDC supply module for high-voltage field instrument loops.
SPTK 240 R1 (SPTK240R1): Power supply module with integrated surge protection for field wiring terminals.
SPTU 240 R2 (SPTU240R2): Second-revision 240 mA supply with enhanced EMC filtering and wider input range.
SPTU 120 R2 (SPTU120R2): Second-revision 120 mA supply; replaces R1 in new-build maintenance kits.
SPTU 480 R2 (SPTU480R2): Second-revision 480 mA high-current supply with improved thermal management.
SPIO 240 R1 (SPIO240R1): S100 I/O power interface module for inter-cabinet bus extension.
SPTU 240 R1A (SPTU240R1A): Regional variant of SPTU240R1 with modified terminal block configuration for specific market requirements.
SPBU 240 R1 (SPBU240R1): Bus power unit providing S100 backplane supply voltage regulation for multi-module subrack assemblies.
SPTU 240 R1B (SPTU240R1B): Variant with conformal coating for high-humidity environments (offshore, coastal installations).

Quality Control for the SPTU Range

SPTU modules undergo a structured verification process prior to dispatch. Each unit is inspected for physical integrity of the S100 bus connector pins, backplane locking tabs, and PCB surface condition. Power supply modules are bench-tested under load at rated output current (120 mA, 240 mA, or 480 mA as applicable) with output voltage measured against ABB specification tolerances (typically ±2% of nominal). Input voltage range compliance is verified across the specified operating band. Modules with integrated fusing are tested for fuse continuity and holder contact resistance. Units exhibiting signs of thermal stress, capacitor bulge, or corroded terminals are rejected and not offered for resale. All tested units are issued a DriveKNMS inspection record referencing the specific test parameters and measured values.