Isolated DIN Rail Mounting Universal Input 4~20mA Transmitter

Product Code: TXDU2

The TXDU2 DIN rail mounting isolated transmitters are microprocessor based and fully linearised.

As standard they feature a universal 2-wire, 4~20mA output (loop power) and universal input which accepts the following:

  • RTD (Pt100 or Pt1000)
  • Thermocouple (Types K, J, T, N, E, R, S, B)
  • Millivolts (mV)
  • Milliamps (mA)
  • Voltage (V)
  • Potentiometer

The units are loop powered, 10-36 V DC and can be supplied pre-ranged to suit your application requirements. Alternatively they can be easily configured using the TX-USB configuration kit. Simply install the software (which is available for free download from our website), connect the USB configuration module and plug the lead into the transmitter. The software will then provide the necessary prompts.

  • Features
  • Technical
  • Documents
  • Software
    • Microprocessor based and fully linearised
    • Universal input
    • Universal 2-wire 4~20mA output (loop power)
    • Accepts RTD, thermocouple, Millivolts, Voltage, Potentiometer input
  • Technical Details (Common)
    Output 4~20mA, 2-wire (loop powered)
    Power Supply 10-36V DC
    Isolation Test Voltages Between input/output: 3750V AC for 1 minute
    Output Load Resistance 700Ω at 24V DC (50Ω/V above 10V DC)
    Maximum Output Currrent Limited to < 28mA (emission & immunity)
    Accuracy < ±0.03% FSO typical
    Ambient Drift < ±0.003%/°C FSO typical
    Noise Immunity 125dB CMRR average (2.0kV DC limit)
    R.F. Immunity <1% effect FSO typical
    Reponse Time 400ms typical (10-90% 300ms typical)
    USB Programmable Zero 0 to ±99% of the span (Potentiometer input N/A)
    Operating Temperature -20°C to +85°C
    Storage Temperature -20°C to +85°C
    Operating Humidity 5-85% RH max (non-condensing)
    Mounting 35mm symmetrical DIN rail
    Dimensions 20mm (W) x 79mm (H) x 68mm (D)
    EMC Compliance Emissions (EN 61326)
    Immunity (EN 61326)
    Safety (EN 61010-1)


    RTD Input Specifications
    Input Pt100 or Pt1000 DIN 3-wire type (2-wire can be used with offset calibration)
    Sensor Current 0.15mA nominal
    Lead Wire Resistance Pt100: 10Ω/wire max.
    Pt1000: 5Ω/wire max.
    0.02% FSO offset error per Ω of lead resistance
    Accuracy ≤ 0.1°C (0°C to +100°C)
    ≤0.3°C (-200°C to 0°C; +100°C to +850°C)
    USB Programmable Span -200°C to +850°C
    Sensor Break Output Drive Function high upscale/low downscale
    Linearity (Pt100) 0.02% FSO for span inputs ≤ +200°C
    0.1% FSO for span inputs ≤ +850°C
    Linearity (Pt1000) 0.02% FSO for span inputs ≤ +200°C
    0.2% FSO for span inputs ≤ +520°C


    Thermocouple Input Specifications
    Thermocouple Types K, J, T, N, E, R, S, B
    Input Impedance 1MΩ min
    Thermocouple Lead Resistance 100Ω max
    Cold Junction Compensation -20°C to +90°C
    Accuracy Types K, J, T, N, E: < ±1°C
    Types R, S, B: < ±2°C
    Temperature Drift Types K, J, T, N, E: < ±0.05°C
    Types R, S, B: < ±0.2°C
    Sensor Break Output Drive Function high upscale/low downscale
    CJC Error < ±1°C


    Current Input Specifications
    Field Programmable Span 1μA-24mA DC
    Input Resistance 10Ω
    Maximum Over-Range 50mA DC continuous
    Linearity and Repeatability < ±0.02% FSO typical


    Voltage Input Specifications
    USB Programmable Span 100mV to ±10V DC (bipolar)
    Input Resistance 300kΩ min
    Maximum Over-Range 60V DC continuous
    Linearity and Repeatability < ±0.02% FSO typical


    Potentiometer Input Specifications
    Potentiometer Input 3-wire potentiometer
    Excitation Voltage 1.2V DC
    Potentiometer Resistance 0-2KΩ low pot, 0-1MΩ high pot
    Field Programmable Zero 0-90% of the span
    Field Programmable Span 0.1-100%
    Linearity and Repeatability < ±0.02% FSO typical


  • No software available