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Product short description:
  • Selectable RTD or linear resistance input type or 0-500 ohm input
  • 4-20mA output (sink/source)
  • 12-32V DC loop/local power
  • USB configuration

The TT235 model is a space-saving two-wire transmitter that isolates and converts an 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.

TT235: Isolated RTD Input, Loop Power, 2-Wire Transmitter Description

The TT235 model is a space-saving two-wire transmitter that isolates and converts an 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, -200 to 850°C input,
4-20mA output, upscale break detect, medium filter.

Input Configuration:
Two- three- or four-wire sensor input connections.
Programs in °C, °F, °K, or ohmic integer values only

Input Ranges
Input Type                                  Range                     Accuracy**
RTD, Pt 100Ω                          -200 to 850°C               ±0.25°C
RTD, Pt 200Ω                         -200 to 850°C                ±0.30°C
RTD, Pt 500Ω                         -200 to 850°C                ±0.50°C
RTD, Pt 1000Ω                       -200 to 850°C                ±1.00°C
Ni 120Ω (Minco 7-120)          -80 to 320°C                ±0.08°C
Cu 10Ω (Minco 16-9)           -200 to 270°C                 ±1.00°C
Resistance (linear)                     0 to 25Ω                    ±0.05Ω
Resistance (linear)                     0 to 450Ω                  ±0.10Ω
Resistance (linear)                     0 to 9000Ω               ±0.90Ω
Resistance (linear)                     0 to 2250Ω               ±2.25Ω
Resistance (linear) *                   0 to 4500Ω              ±4.50Ω

*Note 1: Linear resistance input range approaches but does not include 0Ω and 500Ω. If exactly 0Ω or 500Ω is measured, break detection is triggered.
**Note 2: Rated accuracy (in °C and % of span) applies for input spans greater than 5% of input full-scale.

Input Scaling Adjust:
Zero: 0 to 95% of range, typical.
Full scale: 5 to 100% of full scale range, typical.

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

Output

Output Range: 4 to 20mA DC.
Under-range capability 3.5mA.
Over-range capability 24mA.

Output Compliance:
Rload = (Vsupply – 11V) / 0.020A.
Rload = 0 to 650 ohms @ 24V DC.

Output DAC Resolution: 16-bit D/A converter.

Output Accuracy: Better than ±0.05% of span, typical (±0.1% max) for nominal input spans. Includes the effects of repeatability, 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)
No filter                 22ms
Low filter              50ms
Medium filter    160ms
High filter         1210ms

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: 12-32V DC SELV (Safety Extra Low Voltage), 24mA maximum.

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
  • Selectable RTD or linear resistance input type: Pt RTD (100Ω, 200Ω, 500Ω, or 1000Ω), Ni RTD (120Ω), Cu RTD (10Ω), or Resistance (0-450Ω)
  • 1500V isolation between input/output circuits
  • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
  • High accuracy, linearity, stability, and reliability
  • Supports normal or reverse-acting output
  • Supports sink or source output wiring
  • User-selectable filtering (none, low, med., high)
  • Fast response (as low as 22ms)
  • Selectable upscale or downscale operation for sensor errors and lead-break detection
  • NAMUR-compliant output loop current
  • Shock (25g) and vibration (4g) resistant
  • 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...

Manuals

TT235 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

    TTC-SIP: Software

    • Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
    • Includes configuration sofware CD-ROM (5040-xxx), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
    • Easy setup and digital calibration via USB with Windows configuration software.
    • Download the configuration software only - from the Software Tab
    Select options

Additional information

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

TT235-0600: Transmitter

Configuration

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

Product Series

TT230 Series

Power

Loop Power

  • Description

    TT235: Isolated RTD Input, Loop Power, 2-Wire Transmitter Description

    The TT235 model is a space-saving two-wire transmitter that isolates and converts an 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, -200 to 850°C input,
    4-20mA output, upscale break detect, medium filter.

    Input Configuration:
    Two- three- or four-wire sensor input connections.
    Programs in °C, °F, °K, or ohmic integer values only

    Input Ranges
    Input Type                                  Range                     Accuracy**
    RTD, Pt 100Ω                          -200 to 850°C               ±0.25°C
    RTD, Pt 200Ω                         -200 to 850°C                ±0.30°C
    RTD, Pt 500Ω                         -200 to 850°C                ±0.50°C
    RTD, Pt 1000Ω                       -200 to 850°C                ±1.00°C
    Ni 120Ω (Minco 7-120)          -80 to 320°C                ±0.08°C
    Cu 10Ω (Minco 16-9)           -200 to 270°C                 ±1.00°C
    Resistance (linear)                     0 to 25Ω                    ±0.05Ω
    Resistance (linear)                     0 to 450Ω                  ±0.10Ω
    Resistance (linear)                     0 to 9000Ω               ±0.90Ω
    Resistance (linear)                     0 to 2250Ω               ±2.25Ω
    Resistance (linear) *                   0 to 4500Ω              ±4.50Ω

    *Note 1: Linear resistance input range approaches but does not include 0Ω and 500Ω. If exactly 0Ω or 500Ω is measured, break detection is triggered.
    **Note 2: Rated accuracy (in °C and % of span) applies for input spans greater than 5% of input full-scale.

    Input Scaling Adjust:
    Zero: 0 to 95% of range, typical.
    Full scale: 5 to 100% of full scale range, typical.

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

    Output

    Output Range: 4 to 20mA DC.
    Under-range capability 3.5mA.
    Over-range capability 24mA.

    Output Compliance:
    Rload = (Vsupply – 11V) / 0.020A.
    Rload = 0 to 650 ohms @ 24V DC.

    Output DAC Resolution: 16-bit D/A converter.

    Output Accuracy: Better than ±0.05% of span, typical (±0.1% max) for nominal input spans. Includes the effects of repeatability, 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)
    No filter                 22ms
    Low filter              50ms
    Medium filter    160ms
    High filter         1210ms

    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: 12-32V DC SELV (Safety Extra Low Voltage), 24mA maximum.

    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
    • Selectable RTD or linear resistance input type: Pt RTD (100Ω, 200Ω, 500Ω, or 1000Ω), Ni RTD (120Ω), Cu RTD (10Ω), or Resistance (0-450Ω)
    • 1500V isolation between input/output circuits
    • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
    • High accuracy, linearity, stability, and reliability
    • Supports normal or reverse-acting output
    • Supports sink or source output wiring
    • User-selectable filtering (none, low, med., high)
    • Fast response (as low as 22ms)
    • Selectable upscale or downscale operation for sensor errors and lead-break detection
    • NAMUR-compliant output loop current
    • Shock (25g) and vibration (4g) resistant
    • 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

    Manuals

    TT235 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

      TTC-SIP: Software

      • Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
      • Includes configuration sofware CD-ROM (5040-xxx), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
      • Easy setup and digital calibration via USB with Windows configuration software.
      • Download the configuration software only - from the Software Tab
      Select options
  • Additional information

    Additional information

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

    TT235-0600: Transmitter

    Configuration

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

    Product Series

    TT230 Series

    Power

    Loop Power