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Product short description:
  • J, K, T, E, R, S, B Thermocouple Input
  • DC Voltage or DC Current Output

These models convert sensor inputs to proportional process current or voltage output signals. Excellent accuracy and stability ensure reliable measurements in harsh industrial environments.

 

 

250T-TC, 350T-TC, 450T-TC Loop, DC, or AC-Power Transmitter Description

These models convert sensor inputs to proportional process current or voltage output signals. Excellent accuracy and stability ensure reliable measurements in harsh industrial environments. 3-way isolation. Input, output, and power circuits are isolated from each other.

Models

250T: Loop-powered transmitter series
350T: DC-powered transmitter series
450T: AC-powered transmitter series

Performance Specifications

Input Ranges
Thermocouple types J, K, T, R, S, E, B.
Linearized thermocouple (custom ranges).

Output Ranges
DC Current: 4 to 20mA.
DC voltage: 0 to 5V or 0 to 10V.

Power Requirements: 250T: 12 to 50V DC @ 20mA (loop-powered).

350T: DC Voltage Source
Output Range                Power
4 to 20mA               10 to 36V DC @ 30mA
0 to 5V                      10 to 36V DC @ 9mA
0 to 10V                12.5 to 36V DC @ 9mA

450T: 115V or 230V AC, ±10%, 50 to 60Hz
Output Range                 Power
4 to 20mA                  115V AC @ 0.050A
4 to 20mA                  230V AC @ 0.025A
0 to 5V, 0 to 10V       115V AC @ 0.020A
0 to 5V, 0 to 10V      230V AC @ 0.010A

Ambient Temperature Range
Operating: -13 to 185°F (-25 to 85°C).
Storage: -40 to 185°F (-40 to 85°C).

Accuracy: ±0.1% of calibrated span or ±0.01mV, whichever is greater. Includes repeat-ability, hysteresis, terminal point linearity, and adjustment resolution.

Ambient Temperature Effect:
Less than ±0.01% of output span per °F (±0.018% per °C).
±0.025% of output span per °F (±0.045% per °C) for narrow span units.
(Specification includes the combined effects of zero and span over temperature).

Noise Resistance:
RFI: Less than ±0.5% ,of output span effect.
EMI: Less than ±0.25% of output span effect.

Noise Rejection:
Common Mode: 130dB at 60Hz, 100 ohm unbalance.
Normal Mode: 30dB at 60Hz, 100 ohm source.

Response Time: Output reaches 98% of output span in 300mS.

Bandwidth: -3dB at 3 Hz, typical.

Output Compliance:
250T: RLOAD (max.) = (VSUPPLY – 12V) / 20mA.
350T: RLOAD (max.) = (VSUPPLY – 2.5V) / 20mA.
450T: RLOAD = 600 ohms.

Linearization (-xLxx) Option: 5-segment TC linearizer provides minimum 10 to 1 improvement ±0.1% in the linearity curve.

 

 

  • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments
  • Field-selectable input types reduce stocking requirements
  • Thermocouple reference junction compensation reduces drift and corrects non-linearity
  • TC linearizer (5-slope) improves accuracy
  • TC break detection indicates open circuit failures with selectable up/downscale operation
  • RFI and EMI resistance minimize the effects of environmental noise
  • 75% span adjustment enables precise application calibration
  • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops
    • 250T models: Input isolated from output/power
    • 350T models:Input isolated from output and power. Output and power share a common
    • 450T models: 3-way isolation. Input, output, and power circuits are isolated from each other
  • Operating temperature range: -13 to 185°F (-25 to 85°C)
  • DIN rail G or T mount
  • No certification/approval required

 

 

How to Minimize Thermocouple to Transmitter Measurement Errors - 8500926 (Log in to view the file)
Preventing Temperature Measurement Error in Thermocouple to Transmitter Connections The nature of thermocouple (TC) circuits is that they’re prone to produce error when mating them to a measurement device; unless you have some insight into how these TCs and their components work. This paper reviews thermocouple behavior and outlines common problems encountered when connecting them...
How to use Thermocouples for Temperature Measurement - 8500911 (Log in to view the file)
Criteria for Temperature Selection of T/C and RTD Sensor Types This is part two of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types.   The Basics of Temperature Measurement Using Thermocouples You are probably somewhat familiar with the thermocouple, or...

Manuals

250T-TCx User Manual (Log in to download the file)

350T-TCx User Manual (Log in to download the file)

450T-TCx User Manual (Log in to download the file)

Additional information

Weight 16 oz
Dimensions 3 × 1 × 3.2 in
Part Number

250T-TC1-DIN-NCR: 12 to 50V DC @ 20mA (loop-power) power, 350T-TC1-Y-DIN-NCR: DC-power; 4 to 20mA DC output, 450T-TC1-Y-1-DIN-NCR: AC-power; 4 to 20mA DC output; 115V AC power

Product Series

FlatPack Series

Configuration

Factory Calibration

  • Description

    250T-TC, 350T-TC, 450T-TC Loop, DC, or AC-Power Transmitter Description

    These models convert sensor inputs to proportional process current or voltage output signals. Excellent accuracy and stability ensure reliable measurements in harsh industrial environments. 3-way isolation. Input, output, and power circuits are isolated from each other.

    Models

    250T: Loop-powered transmitter series
    350T: DC-powered transmitter series
    450T: AC-powered transmitter series

    Performance Specifications

    Input Ranges
    Thermocouple types J, K, T, R, S, E, B.
    Linearized thermocouple (custom ranges).

    Output Ranges
    DC Current: 4 to 20mA.
    DC voltage: 0 to 5V or 0 to 10V.

    Power Requirements: 250T: 12 to 50V DC @ 20mA (loop-powered).

    350T: DC Voltage Source
    Output Range                Power
    4 to 20mA               10 to 36V DC @ 30mA
    0 to 5V                      10 to 36V DC @ 9mA
    0 to 10V                12.5 to 36V DC @ 9mA

    450T: 115V or 230V AC, ±10%, 50 to 60Hz
    Output Range                 Power
    4 to 20mA                  115V AC @ 0.050A
    4 to 20mA                  230V AC @ 0.025A
    0 to 5V, 0 to 10V       115V AC @ 0.020A
    0 to 5V, 0 to 10V      230V AC @ 0.010A

    Ambient Temperature Range
    Operating: -13 to 185°F (-25 to 85°C).
    Storage: -40 to 185°F (-40 to 85°C).

    Accuracy: ±0.1% of calibrated span or ±0.01mV, whichever is greater. Includes repeat-ability, hysteresis, terminal point linearity, and adjustment resolution.

    Ambient Temperature Effect:
    Less than ±0.01% of output span per °F (±0.018% per °C).
    ±0.025% of output span per °F (±0.045% per °C) for narrow span units.
    (Specification includes the combined effects of zero and span over temperature).

    Noise Resistance:
    RFI: Less than ±0.5% ,of output span effect.
    EMI: Less than ±0.25% of output span effect.

    Noise Rejection:
    Common Mode: 130dB at 60Hz, 100 ohm unbalance.
    Normal Mode: 30dB at 60Hz, 100 ohm source.

    Response Time: Output reaches 98% of output span in 300mS.

    Bandwidth: -3dB at 3 Hz, typical.

    Output Compliance:
    250T: RLOAD (max.) = (VSUPPLY – 12V) / 20mA.
    350T: RLOAD (max.) = (VSUPPLY – 2.5V) / 20mA.
    450T: RLOAD = 600 ohms.

    Linearization (-xLxx) Option: 5-segment TC linearizer provides minimum 10 to 1 improvement ±0.1% in the linearity curve.

     

     

  • Features & Benefits

    • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments
    • Field-selectable input types reduce stocking requirements
    • Thermocouple reference junction compensation reduces drift and corrects non-linearity
    • TC linearizer (5-slope) improves accuracy
    • TC break detection indicates open circuit failures with selectable up/downscale operation
    • RFI and EMI resistance minimize the effects of environmental noise
    • 75% span adjustment enables precise application calibration
    • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops
      • 250T models: Input isolated from output/power
      • 350T models:Input isolated from output and power. Output and power share a common
      • 450T models: 3-way isolation. Input, output, and power circuits are isolated from each other
    • Operating temperature range: -13 to 185°F (-25 to 85°C)
    • DIN rail G or T mount
    • No certification/approval required

     

     

  • Tech Papers

    How to Minimize Thermocouple to Transmitter Measurement Errors - 8500926 (Log in to view the file)
    Preventing Temperature Measurement Error in Thermocouple to Transmitter Connections The nature of thermocouple (TC) circuits is that they’re prone to produce error when mating them to a measurement device; unless you have some insight into how these TCs and their components work. This paper reviews thermocouple behavior and outlines common problems encountered when connecting them...
    How to use Thermocouples for Temperature Measurement - 8500911 (Log in to view the file)
    Criteria for Temperature Selection of T/C and RTD Sensor Types This is part two of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types.   The Basics of Temperature Measurement Using Thermocouples You are probably somewhat familiar with the thermocouple, or...
  • Specs & Data Sheets

    Manuals

    250T-TCx User Manual (Log in to download the file)

    350T-TCx User Manual (Log in to download the file)

    450T-TCx User Manual (Log in to download the file)

  • Accessories

  • Additional information

    Additional information

    Weight 16 oz
    Dimensions 3 × 1 × 3.2 in
    Part Number

    250T-TC1-DIN-NCR: 12 to 50V DC @ 20mA (loop-power) power, 350T-TC1-Y-DIN-NCR: DC-power; 4 to 20mA DC output, 450T-TC1-Y-1-DIN-NCR: AC-power; 4 to 20mA DC output; 115V AC power

    Product Series

    FlatPack Series

    Configuration

    Factory Calibration