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Product short description:
  • 100 ohm Pt, 120 ohm Ni, 10 ohm Cu (selectable type) input
  • 4 to 20mA DC output
  • 12-50V DC from output loop power
  • DIP-switch configuration, push-button calibration

These units accept universal RTD or resistance input signals and output proportional DC current signals. The output can also be linearized to the input sensor signal.

 

 

657T, 658T: Single or Dual Channel, RTD Input, Loop-powered Transmitter Description

These units accept universal RTD or resistance input signals and output proportional DC current signals. The output can also be linearized to the input sensor signal. Single-channel 657T and dual-channel 658T units are ideal for panel shops and end-users who require a high-density signal conditioner that can accommodate a broad range of temperature measurement applications.

Configuration is fast and easy. First, you select the input type with a simple DIP switch. Then, you set your zero/full-scale output values using a toggle switch on the front panel to increase or decrease the signal until you read the desired output value on your voltmeter. The toggles make it easy to calibrate a normal (proportional) or reverse-acting (inverse) response in seconds. After completing the calibration, just press the mode/set toggle and your configuration settings are safely saved to nonvolatile memory.

Input Ranges
RTD: 100 ohm Pt, 120 ohm Ni, 10 ohm Cu.
Resistance: 0 to 500 ohms.

Output Range: 4 to 20mA DC.

Power Requirement: 12 to 50V DC (loop-powered). Two-wire transmitter.

Approvals: UL, cUL listed. Class I; Division 2; Groups A, B, C, D.

Performance Specifications

General Input

Analog to Digital Converter (ADC): 16-bit S-D A/D converter.

Noise Rejection
Normal Mode: Better than 40dB @ 60Hz.
Common Mode: Better than 100dB @ 60Hz.

Input Overvoltage Protection: Bipolar Transient Voltage Suppressors (TVS).

Input Impedance: 400K ohm at 10mV span; input current, ±25nA, typical (±30nA, max.).

RTD Input

RTD Input Ranges: 100 Ohms, 120W Ni, or 10W Cu; user-configured.

RTD           °C Range (°F Range)                    Accuracy
Pt1              -200 to 850°C (-328 to 1562°F)        ±0.25°C
Pt2             -200 to 850°C (-328 to 1562°F)         ±0.25°C
Ni               -80 to 320°C  (-112 to 608°F)             ±0.25°C
Cu            – 200 to 260°C (-328 to 500°F)            ±1.00°C
Alpha: Pt1 (a = 1.3850), Pt2 (a = 1.3911), Ni a = 1.6720), Cu (a = 1.4272)

2, 3, or 4-wire configurations supported. Module provides sensor excitation, linearization, lead-wire compensation, and sensor break detection.

RTD Excitation Current: 0.5mA DC typical, all types.

RTD Lead-Wire Compensation: 25 ohms per lead.

RTD Break Detection: Configurable for either upscale or downscale.

Resistance Input

Resistance Input Range: 0 to 500 ohms.

Resistance Accuracy: ±0.05 ohms.

Output

Output Range: Range: 4 to 20mA DC, 3.8 to 22mA range typical.

Output Compliance: Rload = (Vsupply – 12V) / 0.02A.

Output Response Control: Proportional/inverse selectable.

Ambient Temperature Effect: Better than ±0.006% of input span per °C or ±100ppm/°C, whichever is greater.

Output Response Time (for input step change): 700mS typical to 98% of final output value.

Environmental

Ambient Temperature
Operating: -25 to 75°C (-13 to 167°F).
Storage: -40 to 85°C (-40 to 185°F).

Relative Humidity: 5 to 95%, non-condensing.

Power Requirement: 12 to 50V DC @ 25mA for each output channel.

Isolation: Not isolated.

Radiated Field Immunity (RFI): Complies with EN61000-4-3 Level 3 and EN50082-1.

Electromagnetic Field Immunity (EMI): Less than ±0.25% of output span effect.

Electrical Fast Transient (EFT): Complies with EN61000-4-4 Level 3 and EN50082-1.

Electrostatic Discharge (ESD): Complies with EN61000-4-2 Level 3 and EN50082-1.

Radiated Emissions: Meets or exceeds EN50081-1 for Class B equipment.

Approvals: UL & cUL listed. Hazardous Locations: Class I: Div. 2; Groups A, B, C, D.

Physical

Enclosure: Case: Self-extinguishing NYLON type 6.6 polyamide thermoplastic UL94 V-2 NEMA Type 1 enclosure.

Connectors (Removable Terminal Blocks): Wire Range: AWG #12-24.

Printed Circuit Boards: Military grade FR-4 epoxy glass circuit board.

Dimensions
1.05W x 4.68H x 4.35D inches, 26.7W x 118.9H x 110.5D millimeters.

Shipping Weight: 1 pound (0.45 Kg) packed.

  • Selectable RTD input types offer flexibility to fit many applications
  • DIP switch-configuration and self-ranging technologies speed installation without pots, jumpers, or software
  • Toggle-switch calibration simplifies field adjustments for faster and easier maintenance
  • Configuration lockout safety feature prevents tampering and accidental changes
  • Reverse-acting output capability enables inverse proportional control signals
  • Dual channel model saves space and reduces equipment costs
  • High-resolution sigma-delta A/D converters deliver superior accuracy for reliable measurements
  • Lead break detection supports upscale or downscale fail-safe mode
  • Operating temperature range: -25 to 75°C (-13 to 167°F)

 

 

How to Select the Best Temperature Sensor for Process Control Applications | Whitepaper (Log in to view the file)
How to Select the Best Temperature Sensor for Process Control Applications Thermocouples versus Resistance Temperature Detectors Many users simply look to fill the basic needs of their application and do not worry much about their choice of temperature sensing technology. That is, they will make a selection based simply on temperature range and their own...
How to use RTDs for Temperature Measurement | Whitepaper (Log in to view the file)
The Basics of Temperature Measurement Using RTDs Temperature reigns as the most often measured process parameter in industry. Most industrial applications require that a temperature be measured remotely, and that this signal be transmitted some distance. An industrial transmitter is commonly used to amplify, isolate, and convert the low-level sensor signal to a high level...

Manuals

657T, 658T User Manual (Log in to download the file)

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Additional information

Weight 16 oz
Dimensions 1.1 × 5 × 4.5 in
Part Number

657T-0600: Single channel, 657T-0600-C: Single channel, with factory calibration. Specify ranges at checkout, 658T-0600: Dual channel, 658T-0600-C: Dual channel, with factory calibration. Specify ranges at checkout

Product Series

600 Series

  • Description

    657T, 658T: Single or Dual Channel, RTD Input, Loop-powered Transmitter Description

    These units accept universal RTD or resistance input signals and output proportional DC current signals. The output can also be linearized to the input sensor signal. Single-channel 657T and dual-channel 658T units are ideal for panel shops and end-users who require a high-density signal conditioner that can accommodate a broad range of temperature measurement applications.

    Configuration is fast and easy. First, you select the input type with a simple DIP switch. Then, you set your zero/full-scale output values using a toggle switch on the front panel to increase or decrease the signal until you read the desired output value on your voltmeter. The toggles make it easy to calibrate a normal (proportional) or reverse-acting (inverse) response in seconds. After completing the calibration, just press the mode/set toggle and your configuration settings are safely saved to nonvolatile memory.

    Input Ranges
    RTD: 100 ohm Pt, 120 ohm Ni, 10 ohm Cu.
    Resistance: 0 to 500 ohms.

    Output Range: 4 to 20mA DC.

    Power Requirement: 12 to 50V DC (loop-powered). Two-wire transmitter.

    Approvals: UL, cUL listed. Class I; Division 2; Groups A, B, C, D.

    Performance Specifications

    General Input

    Analog to Digital Converter (ADC): 16-bit S-D A/D converter.

    Noise Rejection
    Normal Mode: Better than 40dB @ 60Hz.
    Common Mode: Better than 100dB @ 60Hz.

    Input Overvoltage Protection: Bipolar Transient Voltage Suppressors (TVS).

    Input Impedance: 400K ohm at 10mV span; input current, ±25nA, typical (±30nA, max.).

    RTD Input

    RTD Input Ranges: 100 Ohms, 120W Ni, or 10W Cu; user-configured.

    RTD           °C Range (°F Range)                    Accuracy
    Pt1              -200 to 850°C (-328 to 1562°F)        ±0.25°C
    Pt2             -200 to 850°C (-328 to 1562°F)         ±0.25°C
    Ni               -80 to 320°C  (-112 to 608°F)             ±0.25°C
    Cu            – 200 to 260°C (-328 to 500°F)            ±1.00°C
    Alpha: Pt1 (a = 1.3850), Pt2 (a = 1.3911), Ni a = 1.6720), Cu (a = 1.4272)

    2, 3, or 4-wire configurations supported. Module provides sensor excitation, linearization, lead-wire compensation, and sensor break detection.

    RTD Excitation Current: 0.5mA DC typical, all types.

    RTD Lead-Wire Compensation: 25 ohms per lead.

    RTD Break Detection: Configurable for either upscale or downscale.

    Resistance Input

    Resistance Input Range: 0 to 500 ohms.

    Resistance Accuracy: ±0.05 ohms.

    Output

    Output Range: Range: 4 to 20mA DC, 3.8 to 22mA range typical.

    Output Compliance: Rload = (Vsupply – 12V) / 0.02A.

    Output Response Control: Proportional/inverse selectable.

    Ambient Temperature Effect: Better than ±0.006% of input span per °C or ±100ppm/°C, whichever is greater.

    Output Response Time (for input step change): 700mS typical to 98% of final output value.

    Environmental

    Ambient Temperature
    Operating: -25 to 75°C (-13 to 167°F).
    Storage: -40 to 85°C (-40 to 185°F).

    Relative Humidity: 5 to 95%, non-condensing.

    Power Requirement: 12 to 50V DC @ 25mA for each output channel.

    Isolation: Not isolated.

    Radiated Field Immunity (RFI): Complies with EN61000-4-3 Level 3 and EN50082-1.

    Electromagnetic Field Immunity (EMI): Less than ±0.25% of output span effect.

    Electrical Fast Transient (EFT): Complies with EN61000-4-4 Level 3 and EN50082-1.

    Electrostatic Discharge (ESD): Complies with EN61000-4-2 Level 3 and EN50082-1.

    Radiated Emissions: Meets or exceeds EN50081-1 for Class B equipment.

    Approvals: UL & cUL listed. Hazardous Locations: Class I: Div. 2; Groups A, B, C, D.

    Physical

    Enclosure: Case: Self-extinguishing NYLON type 6.6 polyamide thermoplastic UL94 V-2 NEMA Type 1 enclosure.

    Connectors (Removable Terminal Blocks): Wire Range: AWG #12-24.

    Printed Circuit Boards: Military grade FR-4 epoxy glass circuit board.

    Dimensions
    1.05W x 4.68H x 4.35D inches, 26.7W x 118.9H x 110.5D millimeters.

    Shipping Weight: 1 pound (0.45 Kg) packed.

  • Features & Benefits

    • Selectable RTD input types offer flexibility to fit many applications
    • DIP switch-configuration and self-ranging technologies speed installation without pots, jumpers, or software
    • Toggle-switch calibration simplifies field adjustments for faster and easier maintenance
    • Configuration lockout safety feature prevents tampering and accidental changes
    • Reverse-acting output capability enables inverse proportional control signals
    • Dual channel model saves space and reduces equipment costs
    • High-resolution sigma-delta A/D converters deliver superior accuracy for reliable measurements
    • Lead break detection supports upscale or downscale fail-safe mode
    • Operating temperature range: -25 to 75°C (-13 to 167°F)

     

     

  • Tech Papers

    How to Select the Best Temperature Sensor for Process Control Applications | Whitepaper (Log in to view the file)
    How to Select the Best Temperature Sensor for Process Control Applications Thermocouples versus Resistance Temperature Detectors Many users simply look to fill the basic needs of their application and do not worry much about their choice of temperature sensing technology. That is, they will make a selection based simply on temperature range and their own...
    How to use RTDs for Temperature Measurement | Whitepaper (Log in to view the file)
    The Basics of Temperature Measurement Using RTDs Temperature reigns as the most often measured process parameter in industry. Most industrial applications require that a temperature be measured remotely, and that this signal be transmitted some distance. An industrial transmitter is commonly used to amplify, isolate, and convert the low-level sensor signal to a high level...
  • Specs & Data Sheets

    Manuals

    657T, 658T User Manual (Log in to download the file)

  • Accessories

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      20RM-16-DIN: 19” rack-mount kit with DIN rail

      • 19" rack-mount kit with DIN rail
      $200
      Select options
    • Compare

      DIN Rail: Type T

      • DIN Rail Strip, Type T
      $25$35
      Select options
    • 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
       
      $100$255
      Select options
    • Compare

      Terminal Block Replacements

      • Simplifies wiring connections on Acromag I/O Modules
      • Barrier strip or spring clamp terminal block kits
      • Provide safe and secure wiring connections
      $40$50
      Select options
  • Additional information

    Additional information

    Weight 16 oz
    Dimensions 1.1 × 5 × 4.5 in
    Part Number

    657T-0600: Single channel, 657T-0600-C: Single channel, with factory calibration. Specify ranges at checkout, 658T-0600: Dual channel, 658T-0600-C: Dual channel, with factory calibration. Specify ranges at checkout

    Product Series

    600 Series