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Product short description:
  • 100 ohm Pt RTD or 0-900 ohm input
  • 4-20mA output (sink/source)
  • 12-32V DC loop/local power
  • USB configuration

The TT231 model is a space-saving two-wire transmitter that converts a 100 ohm Platinum RTD sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection.

Click here to watch a short AcroMaggie video highlighting the TT230 Series.

TT231: RTD / Resistance Input Two-Wire Transmitter Description

The TT231 model is a space-saving two-wire transmitter that converts a 100 ohm Platinum RTD sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection. The transmitter provides sensor excitation plus performs linearization, lead-wire compensation, and lead-break detection.

Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.

Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile temperature measurement device. These transmitters can withstand harsh industrial environments and operate reliably across a wide temperature range with very low drift. They feature RFI, EMI, ESD, EFT, and surge protection plus low radiated emissions.

Performance Specifications

IMPORTANT: To prevent damage or errors from grounded PCs and surges, Acromag strongly recommends the use of their USB-ISOLATOR when configuring a TT230 Series transmitter.

USB Interface

USB Connector: USB Mini-B type socket, 5-pin.

USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.

USB Transient Protection: Transient voltage suppression on power and data lines.

USB Cable Length: 5.0 meters maximum.

Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.

Input

Default Configuration: 100Ω Pt RTD, α=0.00385 Ω/Ω/°C, 0-200°C input, 4-20mA output, upscale break detection.

Input Configuration: Two-, three- or four-wire sensor input connections.

Input Ranges
100 ohm Platinum RTD, alpha = 375-393, 385 (default), -50 to 850°C (-58 to 1562°F)
0 to 900 ohms linear resistance
Programs in °C, °F, or ohmic integer values only.

Zero Adjust
RTD 3/4 wire: -50, -17.78, or 0°C (-58, 0, 32°F).
RTD 2 wire: 0°C (32°F) fixed.
RES: 0 or 100 ohms.

Full-Scale Adjust:
RTD: up to 850°C (1562°F), 50°C (58°F) span minimum.
Resistance: up to 900 ohms, 8 ohm span minimum.

Excitation Current: 0.5mA, nominal, each ± lead.

Lead-Wire Compensation: 25 ohms per lead.

Lead Break (Sensor Burnout) Detection: Configurable for either upscale or downscale.

Input Filter Bandwidth: -3dB at 700Hz, typical, normal mode filter.

Output

Output Range: 4 to 20mA DC.
Under-scale limit adjustable for 2.1 to 3.6mA, nominal.
Over-scale limit adjustable for 21 to 30mA, nominal.

Output Fault Limits (Sensor Fault): 0.4mA below selected under-scale threshold and 1.0mA above over-scale threshold, typical.

Output Compliance
Rload = (Vsupply – 8.6V) / 0.020A.
Rload = 0 to 750 ohms @ 24V DC.

Output Accuracy: Better than ±0.1% of span, typical for spans less than 500°C. Includes the effects of repeat-ability, terminal point conformity, and linearization, but does not include sensor error.

Ambient Temperature Effect: Better than ±0.008% per °C of input span or ±80ppm/°C, typical. Includes the combined effects of zero and span drift over temperature.

Output Response Time (for step input change): 500μS, typical with 250 ohm load (to reach 98% of final output value).

Environmental

Operating temperature: -40 to 80°C (-40° to 176°F).

Storage temperature: -40 to 85°C (-40 to 185°F).

Relative humidity: 5 to 95% non-condensing.

Power Requirement: 9-32V DC SELV (Safety Extra Low Voltage), 30mA max.

Shock and Vibration Immunity
Vibration: 4g, per IEC 60068-2-6
Shock: 25g, per IEC 60068-2-27

Electromagnetic Compatibility (EMC) Compliance
Radiated Emissions: BS EN 61000-6-4, CISPR 16.
RFI: BS EN 61000-6-2, IEC 61000-4-3.
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
ESD: BS EN 61000-6-2, IEC 61000-4-2.
EFT: BS EN 61000-6-2, IEC 61000-4-4.
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.

Approvals: CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2.

Physical

General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.

Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.

I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.

Dimensions: 12.5 x 114.5 x 99.0 mm (0.5 x 4.51 x 3.90 inches).

Shipping Weight: 0.22 kg (0.5 pounds) packed.

  • Easy setup and digital calibration via USB with Windows configuration software
  • Flexible RTD or linear resistance input ranges (any 100 ohm Pt RTD with 375-393 alpha)
  • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
  • High accuracy, linearity, stability, and reliability
  • Advanced analog signal conditioning ASIC eliminates digitization errors
  • Low temperature drift (<80ppm/°C)
  • Supports sink or source output wiring
  • Programmable over/under-range limits
  • Selectable upscale or downscale operation for sensor errors and lead-break detection
  • NAMUR-compliant output loop current
  • Shock (50g) and vibration (5g) resistant
  • Mounts on Type T DIN-rail
  • Wide ambient operation (-40 to 80°C)
  • CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals

 

The Best Temperature Sensor for Process Control: Thermocouple vs RTD - 8500918 (Log in to view the file)
Criteria for Temperature Selection of T/C and RTD Sensor Types This is part three of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types. Thermocouple vs RTD Many users simply look to fill the basic needs of their application and do...
How to use RTDs for Temperature Measurement - 8500917 (Log in to view the file)
Criteria for Temperature Selection of T/C and RTD Sensor Types This is part two of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types. The Basics of Temperature Measurement Using RTDs A Resistance Temperature Detector (RTD) is a passive circuit element...

Specifications

Manuals

TT231 User Manual (Log in to download the file)

TTC-SIP: Software Interface Package Information Page (Log in to download the file)
TT230 Series Windows Configuration Software (Log in to download the file)
Agility Config Tool (Tethered) (Log in to download the file)
  • Compare

    TT230-Config/Cal: Calibration Service

    • Factory custom configuration/calibration service.
    • Specify input type, input/output zero and full-scale values, filtering, and sensor fault settings on order.
    Select options
  • Compare

    TTBus-Kit: DIN Rail Bus Power Connector

    • One kit supports multiple TT330 series transmitters.
    • For multiple DT330/351 or SP330 transmitters, one TTBUS-KIT is required for each transmitter to be DC Power wired via the bus rail power connections.
       
    Select options
  • Compare

    TTC-SIP: Software

    Select options

Additional information

Weight 8 oz
Dimensions 4.51 × 0.5 × 3.9 in
Part Number

TT231-0600: Transmitter

Configuration

Agility Mobile App, Factory Calibration, USB Configuration, Windows Software Configuration

Product Series

TT230 Series

Power

Loop Power

  • Description

    TT231: RTD / Resistance Input Two-Wire Transmitter Description

    The TT231 model is a space-saving two-wire transmitter that converts a 100 ohm Platinum RTD sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection. The transmitter provides sensor excitation plus performs linearization, lead-wire compensation, and lead-break detection.

    Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.

    Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile temperature measurement device. These transmitters can withstand harsh industrial environments and operate reliably across a wide temperature range with very low drift. They feature RFI, EMI, ESD, EFT, and surge protection plus low radiated emissions.

    Performance Specifications

    IMPORTANT: To prevent damage or errors from grounded PCs and surges, Acromag strongly recommends the use of their USB-ISOLATOR when configuring a TT230 Series transmitter.

    USB Interface

    USB Connector: USB Mini-B type socket, 5-pin.

    USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.

    USB Transient Protection: Transient voltage suppression on power and data lines.

    USB Cable Length: 5.0 meters maximum.

    Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.

    Input

    Default Configuration: 100Ω Pt RTD, α=0.00385 Ω/Ω/°C, 0-200°C input, 4-20mA output, upscale break detection.

    Input Configuration: Two-, three- or four-wire sensor input connections.

    Input Ranges
    100 ohm Platinum RTD, alpha = 375-393, 385 (default), -50 to 850°C (-58 to 1562°F)
    0 to 900 ohms linear resistance
    Programs in °C, °F, or ohmic integer values only.

    Zero Adjust
    RTD 3/4 wire: -50, -17.78, or 0°C (-58, 0, 32°F).
    RTD 2 wire: 0°C (32°F) fixed.
    RES: 0 or 100 ohms.

    Full-Scale Adjust:
    RTD: up to 850°C (1562°F), 50°C (58°F) span minimum.
    Resistance: up to 900 ohms, 8 ohm span minimum.

    Excitation Current: 0.5mA, nominal, each ± lead.

    Lead-Wire Compensation: 25 ohms per lead.

    Lead Break (Sensor Burnout) Detection: Configurable for either upscale or downscale.

    Input Filter Bandwidth: -3dB at 700Hz, typical, normal mode filter.

    Output

    Output Range: 4 to 20mA DC.
    Under-scale limit adjustable for 2.1 to 3.6mA, nominal.
    Over-scale limit adjustable for 21 to 30mA, nominal.

    Output Fault Limits (Sensor Fault): 0.4mA below selected under-scale threshold and 1.0mA above over-scale threshold, typical.

    Output Compliance
    Rload = (Vsupply – 8.6V) / 0.020A.
    Rload = 0 to 750 ohms @ 24V DC.

    Output Accuracy: Better than ±0.1% of span, typical for spans less than 500°C. Includes the effects of repeat-ability, terminal point conformity, and linearization, but does not include sensor error.

    Ambient Temperature Effect: Better than ±0.008% per °C of input span or ±80ppm/°C, typical. Includes the combined effects of zero and span drift over temperature.

    Output Response Time (for step input change): 500μS, typical with 250 ohm load (to reach 98% of final output value).

    Environmental

    Operating temperature: -40 to 80°C (-40° to 176°F).

    Storage temperature: -40 to 85°C (-40 to 185°F).

    Relative humidity: 5 to 95% non-condensing.

    Power Requirement: 9-32V DC SELV (Safety Extra Low Voltage), 30mA max.

    Shock and Vibration Immunity
    Vibration: 4g, per IEC 60068-2-6
    Shock: 25g, per IEC 60068-2-27

    Electromagnetic Compatibility (EMC) Compliance
    Radiated Emissions: BS EN 61000-6-4, CISPR 16.
    RFI: BS EN 61000-6-2, IEC 61000-4-3.
    Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
    ESD: BS EN 61000-6-2, IEC 61000-4-2.
    EFT: BS EN 61000-6-2, IEC 61000-4-4.
    Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.

    Approvals: CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2.

    Physical

    General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.

    Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.

    I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.

    Dimensions: 12.5 x 114.5 x 99.0 mm (0.5 x 4.51 x 3.90 inches).

    Shipping Weight: 0.22 kg (0.5 pounds) packed.

  • Features & Benefits

    • Easy setup and digital calibration via USB with Windows configuration software
    • Flexible RTD or linear resistance input ranges (any 100 ohm Pt RTD with 375-393 alpha)
    • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
    • High accuracy, linearity, stability, and reliability
    • Advanced analog signal conditioning ASIC eliminates digitization errors
    • Low temperature drift (<80ppm/°C)
    • Supports sink or source output wiring
    • Programmable over/under-range limits
    • Selectable upscale or downscale operation for sensor errors and lead-break detection
    • NAMUR-compliant output loop current
    • Shock (50g) and vibration (5g) resistant
    • Mounts on Type T DIN-rail
    • Wide ambient operation (-40 to 80°C)
    • CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals

     

  • Tech Papers

    The Best Temperature Sensor for Process Control: Thermocouple vs RTD - 8500918 (Log in to view the file)
    Criteria for Temperature Selection of T/C and RTD Sensor Types This is part three of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types. Thermocouple vs RTD Many users simply look to fill the basic needs of their application and do...
    How to use RTDs for Temperature Measurement - 8500917 (Log in to view the file)
    Criteria for Temperature Selection of T/C and RTD Sensor Types This is part two of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types. The Basics of Temperature Measurement Using RTDs A Resistance Temperature Detector (RTD) is a passive circuit element...
  • Specs & Data Sheets

    Specifications

    Manuals

    TT231 User Manual (Log in to download the file)

  • Software

    TTC-SIP: Software Interface Package Information Page (Log in to download the file)
    TT230 Series Windows Configuration Software (Log in to download the file)
    Agility Config Tool (Tethered) (Log in to download the file)
  • Accessories

    • Compare

      TT230-Config/Cal: Calibration Service

      • Factory custom configuration/calibration service.
      • Specify input type, input/output zero and full-scale values, filtering, and sensor fault settings on order.
      Select options
    • Compare

      TTBus-Kit: DIN Rail Bus Power Connector

      • One kit supports multiple TT330 series transmitters.
      • For multiple DT330/351 or SP330 transmitters, one TTBUS-KIT is required for each transmitter to be DC Power wired via the bus rail power connections.
         
      Select options
    • Compare

      TTC-SIP: Software

      Select options
  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 4.51 × 0.5 × 3.9 in
    Part Number

    TT231-0600: Transmitter

    Configuration

    Agility Mobile App, Factory Calibration, USB Configuration, Windows Software Configuration

    Product Series

    TT230 Series

    Power

    Loop Power