DSAI133A 3BSE018290R1 | Isolated Analog Input Module

​Parameter ​Specification
​Product Model DSAI133A 3BSE018290R1
​Manufacturer ABB
​Type Isolated Analog Input Module
​Input Type TC (J/K/T/E/R/S)/RTD (Pt100/Cu50)/mV
​Channels 8 differential
​Resolution 16-bit (65,535 counts)
​Accuracy ±0.05% FSR @ 25°C
​Range -10 to +60 mV (±150 mV software-scalable)
​Isolation 1.5 kV channel-to-channel/bus
​CJC Accuracy ±0.5°C
​Scan Rate 50 ms/channel
​Power Supply 24 VDC ±10% (via Power Rail)
​Communication MODBUS RTU (RS-485)
​Operating Temperature -40°C to +85°C
​Certifications UL 61010, IEC 61326, ATEX Zone 2
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Description

Product Overview
The ​ABB DSAI133A 3BSE018290R1 is a high-precision analog input module designed for ABB’s Symphony™ Plus distributed control system. This module provides isolated measurement for low-level signals like thermocouples, RTDs, and millivolt sources, making it essential for temperature monitoring in critical industrial processes. With 16-bit resolution and automatic cold-junction compensation, the ​DSAI133A 3BSE018290R1 achieves ±0.05% FSR accuracy across its -10 to +60 mV range. Housed in a rugged DIN-rail mount enclosure, it withstands harsh environments (-40°C to +85°C) while offering galvanic isolation (1.5 kV) between channels and field wiring. Integration with ABB’s Asset Sentinel enables predictive maintenance through drift detection algorithms, reducing calibration downtime in power plants, refineries, and pharmaceutical facilities.

Technical Specifications

​Parameter ​Specification
​Product Model DSAI133A 3BSE018290R1
​Manufacturer ABB
​Type Isolated Analog Input Module
​Input Type TC (J/K/T/E/R/S)/RTD (Pt100/Cu50)/mV
​Channels 8 differential
​Resolution 16-bit (65,535 counts)
​Accuracy ±0.05% FSR @ 25°C
​Range -10 to +60 mV (±150 mV software-scalable)
​Isolation 1.5 kV channel-to-channel/bus
​CJC Accuracy ±0.5°C
​Scan Rate 50 ms/channel
​Power Supply 24 VDC ±10% (via Power Rail)
​Communication MODBUS RTU (RS-485)
​Operating Temperature -40°C to +85°C
​Certifications UL 61010, IEC 61326, ATEX Zone 2

Key Features & Advantages

Signal Integrity:

  • Automatic sensor break detection with <100 ms response
  • Adjustable digital filtering (10–1000 Hz noise rejection)
  • Intrinsic safety barriers support (Ex i via external isolators)

DSAI133A-3BSE018290R1

Diagnostics & Maintenance:

  • Onboard CJC sensor calibration via ABB Symphony™ Engineer
  • Historical drift logging for predictive calibration scheduling
  • Health status LEDs per channel (OK/Alarm/Fault)

Deployment Flexibility:

  • Hot-swappable without system shutdown
  • Independent channel configuration (mixed sensor types)
  • Spring-clamp terminals support 0.2–2.5 mm² wires

Cybersecurity:

  • Firmware signed with SHA-256 encryption
  • Configuration lockdown via physical key switch

Application Areas

  • ​Power Generation: Boiler tube thermocouple monitoring (>1000°C)
  • ​Oil & Gas: Wellhead RTD temperature profiles in ESP systems
  • ​Chemical Plants: Reactor jacket temperature control (SIL 2 loops)
  • ​Pharma: Freeze-dryer shelf temperature validation (FDA 21 CFR Part 11)
  • ​Metals: Molten metal temperature tracking in furnaces
  • ​Water Treatment: Thermal disinfection sensor arrays

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