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Product short description:
  • DC current input
  • Single, dual, or quad I/O loop-powered isolators

These units receive 4-20mA process current inputs and provide isolated 4-20mA output signals. Power is derived from the input signal current. Each channel operates independently and is isolated from the others to prevent interaction between channels.

671T, 672T, 674T: Multi-Channel, Two-Wire Isolators Description

The 67xT Series units receive 4-20mA process current inputs and provide isolated 4-20mA output signals. Power is derived from the input signal current.

Each channel operates independently and is isolated from the others to prevent interaction between channels.

For easy troubleshooting, each unit has LEDs and diagnostic test points. Fault LEDs identify output open loop conditions and load compliance problems.

The precision 10 ohm sense resistor enables monitoring of the output signal without disturbing field wiring.

Learn more about the 600T Series and view all models

671T, 672T, 674T: Multi-Channel, Two-Wire Isolators Features & Benefits

  • Multiple channels on a single unit saves space and reduces costs.
  • Galvanic isolation eliminates ground loops, reduces noise, and blocks transient signals.
  • Independent channels prevent signal interaction and offer spares for later use.
  • Fault LEDs provide a clear visual warning of open or failed process loops.
  • Single calibration pot per channel enables one-step, precise calibration.
  • Operating Temperature range 25 to 70°C (-13 to 158°F).

Learn more about the 600T Series and view all models

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...
How to Use Acromag 600T Series Isolated Transmitters - 8401028
Application 1 Re-transmitting a signal from a two-wire loop to a second location. Solution Use either a model 651T-0600 (single channel) or 652T-0600 (dual channel) transmitter. Application 2 Splitting a signal from a two-wire loop: two outputs for different locations. Solution Use either a 653T-0600 (single input, dual output) or 652T-0600 (dual input, dual output)...

Manuals

671T, 672T, 674T User Manual (Log in to download the file)

  • Compare

    PS5R: Slim Line Power Supplies

    • 10W, 15W, 30W, 60W, 90W, 120W, and 240W models
    • Universal Input (85-264V AC / 100-370V DC)
    • Lightweight and compact size
     
    Select options

Additional information

Weight 8 oz
Dimensions 1.5 × 5 × 4.5 in
Part Number

671T-0600: Single I/O Channel, 672T-0600: Dual I/O Channel, 674T-0600: Quad I/O Channel

Product Series

600 Series

Power

Loop Power

  • Description

    671T, 672T, 674T: Multi-Channel, Two-Wire Isolators Description

    The 67xT Series units receive 4-20mA process current inputs and provide isolated 4-20mA output signals. Power is derived from the input signal current.

    Each channel operates independently and is isolated from the others to prevent interaction between channels.

    For easy troubleshooting, each unit has LEDs and diagnostic test points. Fault LEDs identify output open loop conditions and load compliance problems.

    The precision 10 ohm sense resistor enables monitoring of the output signal without disturbing field wiring.

    Learn more about the 600T Series and view all models

    671T, 672T, 674T: Multi-Channel, Two-Wire Isolators Features & Benefits

    • Multiple channels on a single unit saves space and reduces costs.
    • Galvanic isolation eliminates ground loops, reduces noise, and blocks transient signals.
    • Independent channels prevent signal interaction and offer spares for later use.
    • Fault LEDs provide a clear visual warning of open or failed process loops.
    • Single calibration pot per channel enables one-step, precise calibration.
    • Operating Temperature range 25 to 70°C (-13 to 158°F).

    Learn more about the 600T Series and view all models

  • 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...
    How to Use Acromag 600T Series Isolated Transmitters - 8401028
    Application 1 Re-transmitting a signal from a two-wire loop to a second location. Solution Use either a model 651T-0600 (single channel) or 652T-0600 (dual channel) transmitter. Application 2 Splitting a signal from a two-wire loop: two outputs for different locations. Solution Use either a 653T-0600 (single input, dual output) or 652T-0600 (dual input, dual output)...
  • Specs & Data Sheets

    Manuals

    671T, 672T, 674T User Manual (Log in to download the file)

  • Accessories

    • Compare

      PS5R: Slim Line Power Supplies

      • 10W, 15W, 30W, 60W, 90W, 120W, and 240W models
      • Universal Input (85-264V AC / 100-370V DC)
      • Lightweight and compact size
       
      Select options
  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 1.5 × 5 × 4.5 in
    Part Number

    671T-0600: Single I/O Channel, 672T-0600: Dual I/O Channel, 674T-0600: Quad I/O Channel

    Product Series

    600 Series

    Power

    Loop Power