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Product short description:
  • Dual inputs
  • 0±150V input
  • 4-20mA outputs (sink/source)
  • 7-32V DC loop/local power
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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 (pending)
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 61000-4-5

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)
  • Pending approvals: CE compliant. UL/cUL Class I Div 2, ATEX/IECEx Zone 2

Specs & Catalogs

Manuals

DT238 User Manual (Log in to download the file)

DT230 and DT330 Configuration Software (Log in to download the file)

Additional information

Weight 8 oz
Dimensions 2.4 × 1.85 × 0.925 in
Part Number

USB-Isolator: includes USB cable

  • Description

    This compact, industrial-grade isolator provides a high-voltage isolation barrier between a computer and a connected USB device.

    The isolation protects equipment from electrical surges and transient voltage spikes. It also eliminates ground loop currents flowing between the PC and peripherals which can cause damage and inaccurate measurements. Additionally, isolation minimizes conducted noise from static discharge, magnetic fields, and radio frequency interference.

    Acromag’s USB isolator is very easy to use. The isolator inserts in-line with the USB connection and operates transparently. No special software drivers are required. The unit receives power from the PC’s USB port and isolates that power to the connected device. High noise immunity and low radiated emissions ensure reliable data transfer in sensitive applications.

  • 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)
    • Pending approvals: CE compliant. UL/cUL Class I Div 2, ATEX/IECEx Zone 2
  • Specs & Data Sheets

    Specs & Catalogs

    Manuals

    DT238 User Manual (Log in to download the file)

  • Software

    DT230 and DT330 Configuration Software (Log in to download the file)
  • Accessories

  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 2.4 × 1.85 × 0.925 in
    Part Number

    USB-Isolator: includes USB cable