ABB ATNT-02
ABB ATNT-02
ABB ATNT-02
ABB ATNT-02

ABB ATNT-02 | Field Mounted Temperature Transmitter for RTD/TC Sensors

  • Brand: ABB
  • Model: ATNT-02
  • Product Type: Temperature Transmitter
  • Series: ABB Field Instrument Series (Temperature Measurement)
  • Core Function: Converts signals from RTD (PT100) or thermocouple (J/K-type) sensors to 4-20mA analog output with HART protocol overlay; enables remote configuration and diagnostics for process temperature monitoring.
  • Key Specs: ±0.1% accuracy, -200°C to +850°C measurement range, 24V DC supply, -40°C to +85°C operating temperature.
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Part number: ABB ATNT-02
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Description

ATNT-02: Product Overview
This device is a field-mounted temperature transmitter within ABB’s Field Instrument Series, designed for industrial process temperature measurement in distributed control systems (DCS) and programmable logic controllers (PLC). In an automation architecture, it functions as a signal converter, positioned near process sensors (e.g., in pipelines, reactors, or storage tanks) to bridge temperature sensors (RTDs, thermocouples) and control systems. Its role is to amplify, linearize, and isolate low-level sensor signals, converting them into standardized 4-20mA analog output with superimposed HART digital signals for enhanced system intelligence.
The core functionality involves signal conditioning for RTD (PT100, 2/3/4-wire) and thermocouple (J, K-type) inputs, including cold-junction compensation for thermocouples and lead resistance cancellation for RTDs. It processes raw sensor data via a 16-bit ADC, applies calibration coefficients for ±0.1% accuracy, and transmits results as 4-20mA current (proportional to temperature) alongside HART 7 protocol data for remote parameter adjustment (e.g., range scaling, damping) and diagnostics (e.g., sensor drift, process noise). The transmitter mounts directly to sensor assemblies or via extension cables, interfacing with ABB 800xA or third-party DCS/PLC systems via analog input modules.
It belongs to the ABB Field Instrument Series, optimized for reliability, long-term stability, and global compliance. The platform’s benefits include modular sensor compatibility (RTD/TC), adherence to IEC 60751 (RTD) and IEC 60584 (thermocouple) standards, and integration with ABB’s FieldCare software for centralized asset management—reducing lifecycle costs through predictive maintenance.

ABB ATNT-02

ABB ATNT-02

ATNT-02: Technical Specifications
  • Model Number: ATNT-02
  • Manufacturer: ABB
  • Product Type: Temperature Transmitter
  • Input Type: RTD (PT100, 2/3/4-wire), Thermocouple (Type J, K)
  • Output Signal: 4-20mA analog (2-wire), HART 7 digital overlay
  • Measurement Range: -200°C to +850°C (RTD); -270°C to +1372°C (thermocouple, type-dependent)
  • Accuracy: ±0.1% of span (including linearity, hysteresis, repeatability)
  • Power Supply: 12-30V DC (loop-powered)
  • Operating Temperature: -40°C to +85°C (ambient)
  • Storage Temperature: -50°C to +90°C
  • Electrical Isolation: 500Vrms (sensor-input to output)
  • Sensor Connection: Spring-loaded terminals (accepts 0.2-2.5mm² wire)
  • Protection Rating: IP65 (weatherproof, dust-tight enclosure)
  • Dimensions: 85mm x 65mm x 35mm (HxWxD, field-mount)
  • Weight: 0.25kg
Core Features & Customer Value​
The transmitter’s design emphasizes measurement precision, system integration flexibility, and operational resilience. The ±0.1% accuracy ensures reliable temperature monitoring in critical processes—for example, in a chemical reactor, it detects minor temperature deviations that could indicate catalyst depletion, enabling proactive adjustments to prevent batch failure. HART 7 protocol support allows engineers to reconfigure range or damping remotely via handheld communicators (e.g., ABB 475) or asset management software (e.g., FieldCare), avoiding costly field visits during process changes.
The 2-wire loop-powered design simplifies wiring, as it shares the same pair for power and signal—reducing installation costs in large facilities (e.g., oil refineries with hundreds of transmitters). The IP65 rating and wide ambient temperature tolerance (-40°C to +85°C) suit harsh environments, from outdoor pipeline monitoring in arctic regions to indoor exposure in chemical plants with acidic vapors.
Electrical isolation (500Vrms) prevents ground loops and transient voltage spikes from corrupting data—essential in environments with heavy machinery (e.g., steel mills), where electromagnetic interference is common. Integration with FieldCare software provides centralized diagnostics, including sensor health trends and process noise analysis. For maintenance teams, this reduces unexpected failures—for instance, detecting sensor drift in a boiler feedwater line before it causes temperature control instability. The modular design allows sensor head replacement without recalibration, minimizing downtime during repairs.

ABB ATNT-02

ABB ATNT-02

Typical Applications​
In a natural gas processing plant, the transmitter monitors suction temperature at a compressor inlet. Its -200°C to +850°C range and HART diagnostics alert operators to icing (indicated by sub-zero readings), preventing compressor damage. The 4-20mA signal feeds an ABB AC800M controller for automatic heating adjustments.
At a pharmaceutical bioreactor, it measures culture medium temperature to maintain sterility. The ±0.1% accuracy ensures compliance with FDA process validation requirements, while HART remote configuration allows adjusting the range during scale-up from lab to production batches.
In a power plant’s steam turbine system, the transmitter tracks main steam temperature. Its IP65 protection guards against moisture from nearby cooling towers, and diagnostics identify sensor aging, prompting timely replacement before efficiency drops.

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