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Product short description:
  • Platinum RTD or Copper RTD (resistance temperature sensor) Input
  • DC Voltage/Current Output

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

These models convert sensor inputs to proportional process current or voltage output signals.

Models

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

250T-RB, 350T-RB, 450T-RB: Features & Benefits

  • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments
  • RTD signal linearization improves accuracy and reduces drift
  • RTD break detection indicates open RTD failures with upscale operation
  • RTD lead wire compensation eliminates the effect of the wire’s resistance
  • RFI and EMI resistance minimize the effects of environmental noise
  • 75% span adjustment enables precise application calibration
  • Low power consumption (350T as low as 9mA)
  • 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
What is the 250T Two-wire RTD Transmitter Failsafe Hook-Up Approach? - 8401068
Two-wire Transmitters and Their “Hook-up” to Achieve a Failsafe Configuration The attached analysis references Acromag’s 250T series RTD (100 ohm platinum) This type of hook-up is typically not used because the effects of lead-wire resistance inaccuracies are additive to the RTD measurement. However, when addressing the problem of FAILSAFE, this configuration offers the most predictable...

Manuals

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

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

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

Additional information

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

250T-RBP1-DIN-NCR: RTD 100 ohm input: 25 to 100°C (45 to 180°F), loop-powered, 250T-RBP2-DIN-NCR: platinum RTD 100 ohm input: 50 to 200°C (90 to 360°F), loop-powered, 350T-RBP1-Y-DIN-NCR: RTD 100 ohm input: 25 to 100°C (45 to 180°F), 4 to 20mA DC output; DC-powered, 450T-RBP1-Y-1-DIN-NCR: RTD 100 ohm input: 25 to 100°C (45 to 180°F), 4 to 20mA DC output; 115V AC powered

Product Series

FlatPack Series

Power

AC Power, DC Power, Loop Power

  • Description

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

    These models convert sensor inputs to proportional process current or voltage output signals.

    Models

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

    250T-RB, 350T-RB, 450T-RB: Features & Benefits

    • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments
    • RTD signal linearization improves accuracy and reduces drift
    • RTD break detection indicates open RTD failures with upscale operation
    • RTD lead wire compensation eliminates the effect of the wire’s resistance
    • RFI and EMI resistance minimize the effects of environmental noise
    • 75% span adjustment enables precise application calibration
    • Low power consumption (350T as low as 9mA)
    • 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

    What is the 250T Two-wire RTD Transmitter Failsafe Hook-Up Approach? - 8401068
    Two-wire Transmitters and Their “Hook-up” to Achieve a Failsafe Configuration The attached analysis references Acromag’s 250T series RTD (100 ohm platinum) This type of hook-up is typically not used because the effects of lead-wire resistance inaccuracies are additive to the RTD measurement. However, when addressing the problem of FAILSAFE, this configuration offers the most predictable...
  • Specs & Data Sheets

    Manuals

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

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

    450T-RBPx 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-RBP1-DIN-NCR: RTD 100 ohm input: 25 to 100°C (45 to 180°F), loop-powered, 250T-RBP2-DIN-NCR: platinum RTD 100 ohm input: 50 to 200°C (90 to 360°F), loop-powered, 350T-RBP1-Y-DIN-NCR: RTD 100 ohm input: 25 to 100°C (45 to 180°F), 4 to 20mA DC output; DC-powered, 450T-RBP1-Y-1-DIN-NCR: RTD 100 ohm input: 25 to 100°C (45 to 180°F), 4 to 20mA DC output; 115V AC powered

    Product Series

    FlatPack Series

    Power

    AC Power, DC Power, Loop Power