ABB DSTA133 Modules – DSTA133 57120001-KN Connection Unit

Technical Dossier

Product Details And Specifications

ABB DSTA133 Series Technical Notes

The ABB DSTA133 series is a family of connection units and interface modules developed for the ABB Advant Controller platform, encompassing the AC 450, AC 70, and Master Bus 300 (MB300) architectures. These modules serve as the physical and electrical interface layer between field wiring and the controller backplane, and have been deployed extensively in continuous-process industries including petrochemical refineries, pulp and paper mills, nuclear auxiliary systems, offshore oil and gas platforms, and large-scale power generation facilities. The DSTA133 range is characterized by its passive and semi-active termination design, enabling field cable connection without active signal conditioning, which reduces failure points in safety-critical environments. Installed base across global heavy industry remains substantial, with many sites operating original hardware beyond 20 years of service life.

The Evolution of DSTA133 Architecture

The DSTA133 designation belongs to ABB's Advant OCS (Open Control System) hardware taxonomy, introduced in the late 1980s as part of the Advant Controller 450 platform. The series was designed to interface with the S100 I/O bus and later adapted for compatibility with the S800 I/O family during ABB's transition toward the Industrial IT architecture in the late 1990s. Early DSTA133 variants used DIN-rail mounted screw-terminal blocks with direct backplane coupling via ribbon or D-sub connectors. As the Advant platform matured, sub-variants were introduced to support different cable entry configurations (top/bottom), increased channel density, and ATEX-rated installations for hazardous area compliance. The 57120001-KN suffix denotes a specific hardware revision and connector keying variant within the DSTA133 family. With ABB's migration toward the System 800xA platform and the AC 800M controller series from the mid-2000s onward, the DSTA133 series entered a maintenance-only lifecycle. ABB ceased active production of most DSTA133 variants by approximately 2010–2015, making third-party sourcing and certified refurbishment the primary supply channel for ongoing maintenance. Compatibility with legacy Advant systems means direct replacement with modern equivalents is rarely feasible without engineering rework, sustaining long-term demand for original hardware.

DSTA133 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the ABB DSTA133 and closely related Advant connection unit family. Models are grouped by functional category.

Connection Units — Field Termination

DSTA133 57120001-KN: Connection unit, MB300 bus, screw terminal, standard keying
DSTA133 57120001-AK: Connection unit, MB300 bus, alternative cable entry configuration
DSTA130 57120001-P: Basic connection unit, S100 I/O bus, passive termination
DSTA131 57120001-P: Connection unit with surge protection, S100 I/O bus
DSTA132 57120001-P: Connection unit, extended channel count, S100 I/O bus
DSTA134 57120001-P: Connection unit, high-density field termination, Advant AC 450

Digital Input (DI) Interface Modules

DSDI110A 57160001-P: 16-channel 24 VDC digital input module, S100 I/O
DSDI110B 57160001-P: 16-channel 24 VDC DI module, improved noise immunity revision
DSDI115A 57160001-P: 16-channel 48 VDC digital input module, S100 I/O
DSDI120A 57160001-P: 32-channel 24 VDC digital input, high-density S100 I/O

Digital Output (DO) Interface Modules

DSDO110A 57160001-P: 16-channel 24 VDC digital output, relay-isolated, S100 I/O
DSDO115A 57160001-P: 16-channel 48 VDC digital output module, S100 I/O
DSDO120A 57160001-P: 32-channel 24 VDC digital output, high-density S100 I/O

Analog Input (AI) Interface Modules

DSAI110A 57160001-P: 8-channel 4–20 mA analog input, 12-bit resolution, S100 I/O
DSAI130A 57160001-P: 8-channel thermocouple/RTD analog input, S100 I/O
DSAI155A 57160001-P: 16-channel 4–20 mA analog input, high-density S100 I/O

Analog Output (AO) Interface Modules

DSAO110A 57160001-P: 4-channel 4–20 mA analog output, 12-bit resolution, S100 I/O
DSAO120A 57160001-P: 8-channel 4–20 mA analog output, S100 I/O

Power Supply Modules

DSDP140 57360001-P: 24 VDC redundant power supply module, Advant AC 450 rack
DSDP150 57360001-P: 48 VDC power supply module, Advant controller backplane