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Product short description:
  • Dual inputs
  • 0±150V input
  • 4-20mA outputs (sink/source)
  • 7-32V DC loop/local power

The DT238 model is a two-wire dual transmitter that isolates and converts high-level DC voltage inputs to proportional 4-20mA control signals. Power is received from the output loop current or a DC supply when using a three-wire connection.

Click here to watch a short video highlighting the features of the DT238.

 

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DT238: High DC Voltage Input Two-Wire Dual Transmitter Description

DT230 series signal conditioners provide two independent I/O channels in a single, space-saving unit. The DT238 model is a two-wire dual transmitter that isolates and converts high-level DC voltage inputs to proportional 4-20mA control signals. Power is received from the output loop current or a DC supply when using a three-wire connection.

High-voltage isolation separates all input and output circuits from each other. Isolation protects from surges, reduces noise, and eliminates ground loop errors.

Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software. The Android app enables setup with mobile devices.

Advanced signal processing capabilities, variable range input/output, and convenient USB programming make this instrument very versatile. 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 ground loop error between a grounded PC and a grounded input signal, Acromag strongly recommends use of a USB isolator like Acromag’s USB-Isolator when configuring a DT230 Series transmitter.

USB Interface

USB Connection
Type: USB Mini-B type socket, 5-pin.
Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.
Maximum cable length: 5.0 meters.
Transient voltage suppression on power and data lines.

Input (two channels)

Default Configuration/Calibration:
Input: ±150V, medium filter.
Output: 4 to 20mA.

Scaling Adjust: Full range.

Input Impedance:
Path A: 15MΩ.
Path B: 1MΩ.

Input Over-Voltage Protection: Bipolar Transient Voltage Suppression (TVS) and diode clamping.

Input Filter: RC filter plus variable digital filter (none, low, medium, high).

Input Bandwidth: -3dB @ 16Hz (no filtering).

Noise Rejection (@ 60Hz, no filter):
Common Mode: 70dB no filter (113dB high filter).
Normal Mode: Path A 32dB, Path B 51dB no filter (>80dB high filter).

Output (two channels)

D/A Converters (DAC): Two 16-bit D/A converters.

Output Ranges: 4-20mA DC 3.5-24mA under/over-range capability.

Output Accuracy: ±0.05%, typical. ±0.1%, maximum.

Output Compliance:
Rload = (Vsupply – 7V) / 0.020A.
Rload = 0 to 850 ohms @ 24V DC.

Output Response Time (for step input change)

Time to reach 98% of output value (typical)
No filtering               34 milliseconds
Low filter                  62 milliseconds
Medium filter         195 milliseconds
High filter             1109 milliseconds

Output Ripple: Less than ±0.1% of output span.

Environmental

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

Storage: -40 to 85°C (-40 to 185°F).

Relative humidity: 5 to 95% non-condensing.

Power Requirement: Loop-powered, 7-32V DC SELV, 24mA max.

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.

Approvals 
CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2, II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C.

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.1000-4-5

Physical

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

Case Material: Self-extinguishing polyamide, UL94 V-0 rated.

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

Dimensions: 17.5 x 114.5 x 99.0 mm (0.7 x 4.51 x 3.90 inches).

Unit weight: 0.16 kg (0.35 pounds).

Shipping Weight: 0.22 kg (0.5 pounds) packed.

 

  • Operate as a dual transmitter, a single transmitter, or a signal splitter
  • Easy configuration via USB with Windows software or Agility™ app for Android
  • Independently adjustable and scalable input and output ranges
  • Selectable voltage input ranges: ±15V, ±75V, ±150V, 0-15V, 0-75V, 0-150V DC
  • 4-20mA current loop outputs support sinking or sourcing circuit configurations
  • Supports reverse-acting (inverse) output
  • User-configurable output range clamp levels support NAMUR-compliant operation
  • Very low 7V two-wire loop burden
  • High accuracy, linearity, stability, and reliability
  • User-selectable filtering (none, low, med, high)
  • Space-saving 17.5mm (0.7 inch) unit with pluggable terminals for convenient wiring
  • 1500V isolation, 4-way (inputs/outputs)
  • Wide ambient operation (-40 to 80°C)
  • Approvals: CE compliant. UL/cUL Class I Div 2, ATEX/IECEx Zone 2

 

 

 

Specifications

Manuals

DT238 User Manual (Log in to download the file)

DT230 and DT330 Configuration Software (Log in to download the file)
Agility Config Tool (Tethered) (Log in to download the file)
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Additional information

Weight 16 oz
Dimensions 13 × 12 × 3 in
Part Number

DT238-0600: Isolated 4-20mA Loop-Powered Outputs

Configuration

Agility Mobile App, Windows Software Configuration

Product Series

DT230 Series

  • Description

    DT238: High DC Voltage Input Two-Wire Dual Transmitter Description

    DT230 series signal conditioners provide two independent I/O channels in a single, space-saving unit. The DT238 model is a two-wire dual transmitter that isolates and converts high-level DC voltage inputs to proportional 4-20mA control signals. Power is received from the output loop current or a DC supply when using a three-wire connection.

    High-voltage isolation separates all input and output circuits from each other. Isolation protects from surges, reduces noise, and eliminates ground loop errors.

    Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software. The Android app enables setup with mobile devices.

    Advanced signal processing capabilities, variable range input/output, and convenient USB programming make this instrument very versatile. 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 ground loop error between a grounded PC and a grounded input signal, Acromag strongly recommends use of a USB isolator like Acromag’s USB-Isolator when configuring a DT230 Series transmitter.

    USB Interface

    USB Connection
    Type: USB Mini-B type socket, 5-pin.
    Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.
    Maximum cable length: 5.0 meters.
    Transient voltage suppression on power and data lines.

    Input (two channels)

    Default Configuration/Calibration:
    Input: ±150V, medium filter.
    Output: 4 to 20mA.

    Scaling Adjust: Full range.

    Input Impedance:
    Path A: 15MΩ.
    Path B: 1MΩ.

    Input Over-Voltage Protection: Bipolar Transient Voltage Suppression (TVS) and diode clamping.

    Input Filter: RC filter plus variable digital filter (none, low, medium, high).

    Input Bandwidth: -3dB @ 16Hz (no filtering).

    Noise Rejection (@ 60Hz, no filter):
    Common Mode: 70dB no filter (113dB high filter).
    Normal Mode: Path A 32dB, Path B 51dB no filter (>80dB high filter).

    Output (two channels)

    D/A Converters (DAC): Two 16-bit D/A converters.

    Output Ranges: 4-20mA DC 3.5-24mA under/over-range capability.

    Output Accuracy: ±0.05%, typical. ±0.1%, maximum.

    Output Compliance:
    Rload = (Vsupply – 7V) / 0.020A.
    Rload = 0 to 850 ohms @ 24V DC.

    Output Response Time (for step input change)

    Time to reach 98% of output value (typical)
    No filtering               34 milliseconds
    Low filter                  62 milliseconds
    Medium filter         195 milliseconds
    High filter             1109 milliseconds

    Output Ripple: Less than ±0.1% of output span.

    Environmental

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

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

    Relative humidity: 5 to 95% non-condensing.

    Power Requirement: Loop-powered, 7-32V DC SELV, 24mA max.

    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.

    Approvals 
    CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2, II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C.

    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.1000-4-5

    Physical

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

    Case Material: Self-extinguishing polyamide, UL94 V-0 rated.

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

    Dimensions: 17.5 x 114.5 x 99.0 mm (0.7 x 4.51 x 3.90 inches).

    Unit weight: 0.16 kg (0.35 pounds).

    Shipping Weight: 0.22 kg (0.5 pounds) packed.

     

  • Features & Benefits

    • Operate as a dual transmitter, a single transmitter, or a signal splitter
    • Easy configuration via USB with Windows software or Agility™ app for Android
    • Independently adjustable and scalable input and output ranges
    • Selectable voltage input ranges: ±15V, ±75V, ±150V, 0-15V, 0-75V, 0-150V DC
    • 4-20mA current loop outputs support sinking or sourcing circuit configurations
    • Supports reverse-acting (inverse) output
    • User-configurable output range clamp levels support NAMUR-compliant operation
    • Very low 7V two-wire loop burden
    • High accuracy, linearity, stability, and reliability
    • User-selectable filtering (none, low, med, high)
    • Space-saving 17.5mm (0.7 inch) unit with pluggable terminals for convenient wiring
    • 1500V isolation, 4-way (inputs/outputs)
    • Wide ambient operation (-40 to 80°C)
    • Approvals: CE compliant. UL/cUL Class I Div 2, ATEX/IECEx Zone 2

     

     

     

  • Specs & Data Sheets

    Specifications

    Manuals

    DT238 User Manual (Log in to download the file)

  • Software

    DT230 and DT330 Configuration Software (Log in to download the file)
    Agility Config Tool (Tethered) (Log in to download the file)
  • Accessories

    • Compare

      4001-252: DIN Rail End Stops

      • DIN rail end stop for hazloc approvals
      $10
      Select options
    • Compare

      Agility™ Config Tool (Tethered)

      • Tethered Agility™ Config Tool mobile application
      • For Acromag SP Series Signal Splitters and most TT Series Transmitters
      • Download available on Google Play for free.
      • Download Windows configuration software from the software tab below.
      Read more
    • Compare

      USB Cables

      Various USB cables
      $20
      Select options
    • Compare

      USB Isolator

      • USB-powered, USB 2.0 and 1.1 compatible
      • 1500V AC / 2100V DC isolation
      • No drivers required
      This compact, industrial-grade isolator provides a high-voltage isolation barrier between a computer and a connected USB device.  
      $110
      Select options
  • Additional information

    Additional information

    Weight 16 oz
    Dimensions 13 × 12 × 3 in
    Part Number

    DT238-0600: Isolated 4-20mA Loop-Powered Outputs

    Configuration

    Agility Mobile App, Windows Software Configuration

    Product Series

    DT230 Series