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Product short description:
  • 4-20mA DC input
  • 4-20mA DC output
  • 12 to 50V DC @ 20mA (loop-powered)
  • 1500V AC peak isolation DC prevents ground loops

The 270i accepts a process current input and provides an isolated 4 to 20mA process current output signal. Power is received from the input signal current.

270i: Input Loop-Power Isolator Description

The 270i accepts a process current input and provides an isolated 4 to 20mA process current output signal. Power is received from the input signal current.

These isolators use transformer isolation to effectively break the electrical path between the transmitted signal and the receiving device. This eliminates ground loops, reduces noise, and helps protect against transients for more accurate and reliable measurements.

This product is also extremely easy to install. All units are factory calibrated for loads up to 600 ohms to eliminate any need for load trim adjustments.

Approvals
CSA
Class I; Division 2; Groups A, B, C, D

270i Loop Powered Isolator Features & Benefits

  • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments.
  • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops.
  • RFI and EMI resistance minimize the effects of environmental noise.
  • Calibration is independent of the load to eliminate load compensation adjustments
  • Zero and span adjustment enable precise calibration.
  • Compact, 1-inch wide housing uses less space for easier installation in control panels.
  • Input current sense resistor simplifies field diagnostics.
  • Operating temperature range -13 to 185°F (-25 to 85°C).
Why Do I Need Electrical Isolation? - 8500988 (Log in to view the file)
Why do we need signal isolation? Acromag is in the business of signal conditioning. We manufacture circuits that amplify, isolate, filter, and convert one signal form to another. Most of these circuits also provide electrical isolation. However, added isolation has a cost. Thus, sometimes customers either question their need for isolation or fail to recognize...
How to Select a 4-20mA Isolator - 8400850 (Log in to view the file)
Click here to download How to Select a 4-20mA Isolator Introduction Acromag manufactures a variety of isolators to provide a cost effective solution for many applications. The main reasons for using an isolator are to: eliminate bucking power supplies; protect expensive control room equipment from transient spikes; and break ground loops that may exist between...

Specifications

Manuals

270i Series User Manual (Log in to download the file)

Additional information

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

270i-20MA-DIN-NCR: DIN rail G or T mount; no certification/approval required, 270i-20MA-DIN-DT1: DIN rail G or T mount; CSA approval Div 2 hazardous locations

Product Series

FlatPack Series

  • Description

    270i: Input Loop-Power Isolator Description

    The 270i accepts a process current input and provides an isolated 4 to 20mA process current output signal. Power is received from the input signal current.

    These isolators use transformer isolation to effectively break the electrical path between the transmitted signal and the receiving device. This eliminates ground loops, reduces noise, and helps protect against transients for more accurate and reliable measurements.

    This product is also extremely easy to install. All units are factory calibrated for loads up to 600 ohms to eliminate any need for load trim adjustments.

    Approvals
    CSA
    Class I; Division 2; Groups A, B, C, D

    270i Loop Powered Isolator Features & Benefits

    • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments.
    • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops.
    • RFI and EMI resistance minimize the effects of environmental noise.
    • Calibration is independent of the load to eliminate load compensation adjustments
    • Zero and span adjustment enable precise calibration.
    • Compact, 1-inch wide housing uses less space for easier installation in control panels.
    • Input current sense resistor simplifies field diagnostics.
    • Operating temperature range -13 to 185°F (-25 to 85°C).
  • Tech Papers

    Why Do I Need Electrical Isolation? - 8500988 (Log in to view the file)
    Why do we need signal isolation? Acromag is in the business of signal conditioning. We manufacture circuits that amplify, isolate, filter, and convert one signal form to another. Most of these circuits also provide electrical isolation. However, added isolation has a cost. Thus, sometimes customers either question their need for isolation or fail to recognize...
    How to Select a 4-20mA Isolator - 8400850 (Log in to view the file)
    Click here to download How to Select a 4-20mA Isolator Introduction Acromag manufactures a variety of isolators to provide a cost effective solution for many applications. The main reasons for using an isolator are to: eliminate bucking power supplies; protect expensive control room equipment from transient spikes; and break ground loops that may exist between...
  • Specs & Data Sheets

    Specifications

    Manuals

    270i Series User Manual (Log in to download the file)

  • Additional information

    Additional information

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

    270i-20MA-DIN-NCR: DIN rail G or T mount; no certification/approval required, 270i-20MA-DIN-DT1: DIN rail G or T mount; CSA approval Div 2 hazardous locations

    Product Series

    FlatPack Series