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Product short description:
  • Multi-range ±15V, ±75V or ±150V DC input
  • 4-20mA ouput (sink/source)
  • 12-32 V DC loop power

The TT238 model is a space-saving two-wire transmitter that isolates and converts a high level DC voltage input to a proportional 4-20mA control signal. A single unit supports multiple voltage input ranges for extra flexibility. Power is received from the output loop current or a local DC supply when using a three-wire connection.

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

TT238: High Voltage Input, Loop-Powered, 2-Wire Transmitter Description

The TT238 model is a space-saving two-wire transmitter that isolates and converts a high level DC voltage input to a proportional 4-20mA control signal. A single unit supports multiple voltage input ranges for extra flexibility. Power is received from the output loop current or a local DC supply when using a three-wire connection.

High-voltage isolation separates the input from the output circuit. Isolation protects from surges, reduces noise, and eliminates ground loop errors.

Setup and calibration is 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/Calibration
Input: ±150V, medium filtering.
Output: 4 to 20mA.

Input Ranges and Accuracy
Range                   Accuracy
±15V DC            ±0.05% of span
±75V DC            ±0.05% of span
±150V DC         ±0.05% of span
Error includes the effects of repeatability, terminal point conformity, and linearization.

Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C).

Zero Scaling Adjust: 0 to 95% of range, typical.

Full Scale Adjust: 5 to 100% of full scale range, typical.

Input Impedance: Greater than 1M ohms.

Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 220V working typical.

Input Resolution
Bipolar input: 1 part in 50000 (±25000).
Unipolar input: 1 part in 25000.

Input Filter: Selectable digital filtering settings (low, medium, high).

Input Filter Bandwidth: Normal mode plus digital filtering within the ADC Bandwidth (-3dB) varies with digital filter setting from 4Hz without filtering to 0.33Hz with high filtering.

Noise Rejection (Common Mode, High Filter): 130dB @ 60Hz, typical with 100 ohm input unbalance.

Output

Output Range: 4 to 20mA DC.

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

Output Response Time (for step input change)

Time to reach 98% of output value (typical)
Low filter                   50 milliseconds
Medium filter        150 milliseconds
High filter             1200 milliseconds

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.

Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input and output circuits.

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
  • Single unit supports ±15V, ±75V, and ±150V DC input ranges
  • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
  • High accuracy, linearity, stability, and reliability
  • User-selectable filtering (low, medium, high)
  • Supports sink or source output wiring
  • Supports reverse-acting (inverse) output
  • Selectable upscale or downscale operation for sensor errors and lead-break detection
  • 1500V input isolation
  • 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

Manuals

TT238 User Manual (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

TT238-0600: High voltage input

Configuration

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

Product Series

TT230 Series

Power

Loop Power

  • Description

    TT238: High Voltage Input, Loop-Powered, 2-Wire Transmitter Description

    The TT238 model is a space-saving two-wire transmitter that isolates and converts a high level DC voltage input to a proportional 4-20mA control signal. A single unit supports multiple voltage input ranges for extra flexibility. Power is received from the output loop current or a local DC supply when using a three-wire connection.

    High-voltage isolation separates the input from the output circuit. Isolation protects from surges, reduces noise, and eliminates ground loop errors.

    Setup and calibration is 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/Calibration
    Input: ±150V, medium filtering.
    Output: 4 to 20mA.

    Input Ranges and Accuracy
    Range                   Accuracy
    ±15V DC            ±0.05% of span
    ±75V DC            ±0.05% of span
    ±150V DC         ±0.05% of span
    Error includes the effects of repeatability, terminal point conformity, and linearization.

    Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C).

    Zero Scaling Adjust: 0 to 95% of range, typical.

    Full Scale Adjust: 5 to 100% of full scale range, typical.

    Input Impedance: Greater than 1M ohms.

    Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 220V working typical.

    Input Resolution
    Bipolar input: 1 part in 50000 (±25000).
    Unipolar input: 1 part in 25000.

    Input Filter: Selectable digital filtering settings (low, medium, high).

    Input Filter Bandwidth: Normal mode plus digital filtering within the ADC Bandwidth (-3dB) varies with digital filter setting from 4Hz without filtering to 0.33Hz with high filtering.

    Noise Rejection (Common Mode, High Filter): 130dB @ 60Hz, typical with 100 ohm input unbalance.

    Output

    Output Range: 4 to 20mA DC.

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

    Output Response Time (for step input change)

    Time to reach 98% of output value (typical)
    Low filter                   50 milliseconds
    Medium filter        150 milliseconds
    High filter             1200 milliseconds

    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.

    Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input and output circuits.

    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
    • Single unit supports ±15V, ±75V, and ±150V DC input ranges
    • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
    • High accuracy, linearity, stability, and reliability
    • User-selectable filtering (low, medium, high)
    • Supports sink or source output wiring
    • Supports reverse-acting (inverse) output
    • Selectable upscale or downscale operation for sensor errors and lead-break detection
    • 1500V input isolation
    • 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
  • Specs & Data Sheets

    Manuals

    TT238 User Manual (Log in to download the file)

  • Software

    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

    TT238-0600: High voltage input

    Configuration

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

    Product Series

    TT230 Series

    Power

    Loop Power