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Product short description:
  • Dual channels
  • RTD (Pt, Ni, Cu), 0-4500 ohm inputs
  • 4-20mA output (sink/source)
  • 7-32V DC loop power
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DT230 series signal conditioners provide two independent I/O channels in a single, space-saving unit. The DT235 model is a two-wire dual transmitter that isolates and converts RTD or linear resistance sensor inputs to a proportional 4-20mA control signal. 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
Input: 100Ω Pt RTD, 3-wire, =0.00385, -200 to 850°C, medium filter
Output: 4 to 20mA, upscale break detect

A/D Converters (ADC)
Two 24-bit Sigma Delta ADCs (only 16-bits used)

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                ±1.0°C
Ni 120Ω (Minco 7-120)          -80 to 320°C                ±0.08°C
Cu 10Ω (Minco 16-9)           -200 to 270°C                 ±1.0°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

Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C)
Scaling Adjust: Full range
Lead Break (Sensor Burnout) Detection: Upscale/downscale
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: 101dB no filter
Normal Mode: 11dB no 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                  80 milliseconds
Medium filter        214 milliseconds
High filter            1238 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 RTD and linear resistance input types: Pt 100/200/500Ω, Ni 120Ω, Cu 10Ω, 0-4500Ω
  • 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
  • Selectable up/downscale sensor break detection
  • 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

Specifications

Manuals

DT235 User Manual (Log in to download the file)

DT230 and DT330 Configuration Software (Log in to download the file)
Agility Config Tool (Log in to download the file)
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    TTC-SIP: Software

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    • Includes configuration sofware CD-ROM (5040-944), 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 below
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Additional information

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

USB-Isolator: includes USB cable

  • Description

  • 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 RTD and linear resistance input types: Pt 100/200/500Ω, Ni 120Ω, Cu 10Ω, 0-4500Ω
    • 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
    • Selectable up/downscale sensor break detection
    • 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

    Specifications

    Manuals

    DT235 User Manual (Log in to download the file)

  • Software

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

    • Compare

      4001-252: DIN Rail End Stops

      $10
      Read more
    • 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 (5040-944), 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 below
      $40$160
      Select options
    • Compare

      USB Cables

      $15
      Select options
    • Compare

      USB Isolator

      $99
      Select options
  • Additional information

    Additional information

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

    USB-Isolator: includes USB cable