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Product short description:
  • TC (types J, K T, R, S, E, B, N), ±1V DC, selectable range/type input
  • 4 to 20mA DC output
  • 12-50V DC from output loop power
  • DIP-switch configuration, signal linearizer, push-button calibration

These units accept universal thermocouple and millivolt input signals, provide isolation, and output proportional DC current signals. The output can also be linearized to the input sensor signal.

 

655T, 656T: Single or Dual Channel, Thermocouple/milliVolt Input, Loop-powered Transmitter Description

These units accept universal thermocouple and millivolt input signals, provide isolation, and output proportional DC current signals. The output can also be linearized to the input sensor signal. Single-channel units are ideal for panel shops and end-users who require a high-density signal conditioner that can cover 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 setting the desired calibration, just press the mode/set toggle and your configuration settings are safely saved to nonvolatile memory.

Both models provide high-voltage input isolation (output and power circuits share a common). On dual channel units, each channel operates independently, with inputs isolated from each other, to prevent interaction between channels.

Input Ranges
TC types: J, K, T, R, S, E, B, N (DIP switch selection)
DC voltage: ±15.6mV to ±62.5mV, 0 to 1V DC

Output Ranges: 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 Over-voltage Protection: Bipolar Transient Voltage Suppressors (TVS)

Thermocouple Input

Input Ranges (switch-selectable)
TC Type         Temperature Range                   Accuracy
J                    -210 to 760°C (-346 to 1400°F)           ±0.5°C
K                     200 to 1372°C (-328 to 2502°F)        ±0.5°C
T                    -260 to 400°C (-436 to 752°F)             ±0.5°C
R                      -50 to 1768°C (-58 to 3214°F)           ±1.0°C
S                      -50 to 1768°C (-58 to 3214°F)           ±1.0°C
E                    -200 to 1000°C (-328 to 1832°F)        ±0.5°C
B                     260 to 1820°C (500 to 3308°F)          ±1.0°C
N                   -230 to 1300°C (-382 to 2372°F)        ±0.5°C
Span adjust: Full range. 100°C or 3mV minimum span recommended.
Zero adjust: 0 to 90 % of full range.

Thermocouple Linearization: On/off selectable.

Thermocouple Break Detection: TC sensor failure can be configured for either upscale or downscale.

Cold Junction Compensation (CJC) Control: On/off selectable.

milliVolt Input

Input Range
Ranges: ±15.6, ±31.3, ±62.5mV, 0 to 0.125, 0.25, 0.5, 1.0V DC.
Span adjust: 10 to 100% of range.
Zero adjust: 0 to 90% of range.

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: Inputs, outputs, and individual channels are isolated from each other for common-mode voltages up to 250V AC, or 354V DC off ground, on a continuous basis (will withstand 1500V AC dielectric strength test for one minute without breakdown).

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 thermocouple input types offer flexibility to fit many applications.
  • DIP switch-configuration and self-ranging technologies speed installation without pots, jumpers, or software.
  • Linearizer function provides an output that is linear to the temperature or millivolt signal.
  • Isolation eliminates ground loops, reduces noise, and blocks transient signals.
  • 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.
  • CJC control only requires a millivolt source to calibrate modules
  • High-resolution sigma-delta A/D converters deliver superior accuracy for reliable measurements.
  • Operating temperature range: -25 to 75°C (-13 to 167°F)

 

How to use Thermocouple Transmitters to Monitor Temperatures in Paint Systems - 8400818
This document illustrates using Acromag’s TT330 Series to monitor high temperatures in an automotive paint curing oven and transmit to the existing PLC 4-20mA input card/software setup. Defining the Problem The area around an auto manufacturer’s paint curing ovens is at elevated temperatures affecting the performance of locally installed instrumentation. Placing signal conditioners rated for...
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 & Catalogs

Manuals

655T, 656T User Manual (Log in to download the file)

Additional information

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

655T-0600: single I/O channel; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, 655T-0600-C: single I/O channel; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, with factory calibration. Specify ranges at checkout, 656T-0600: dual I/O channels; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, 656T-0600-C: dual I/O channels; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, with factory calibration, 656T-E600: dual I/O channel economy version; TC J, K and 0-125mV input (no linearization); 4 to 20mA DC output (no inverse proportional (reverse) output), 656T-E600-C: dual I/O channel economy version; TC J, K and 0-125mV input (no linearization); 4 to 20mA DC output (no inverse proportional (reverse) output, with factory calibration. Specify ranges at checkout

Product Series

600 Series

Configuration

DIP-Switch Configuration

Power

Loop Power

  • Description

    655T, 656T: Single or Dual Channel, Thermocouple/milliVolt Input, Loop-powered Transmitter Description

    These units accept universal thermocouple and millivolt input signals, provide isolation, and output proportional DC current signals. The output can also be linearized to the input sensor signal. Single-channel units are ideal for panel shops and end-users who require a high-density signal conditioner that can cover 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 setting the desired calibration, just press the mode/set toggle and your configuration settings are safely saved to nonvolatile memory.

    Both models provide high-voltage input isolation (output and power circuits share a common). On dual channel units, each channel operates independently, with inputs isolated from each other, to prevent interaction between channels.

    Input Ranges
    TC types: J, K, T, R, S, E, B, N (DIP switch selection)
    DC voltage: ±15.6mV to ±62.5mV, 0 to 1V DC

    Output Ranges: 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 Over-voltage Protection: Bipolar Transient Voltage Suppressors (TVS)

    Thermocouple Input

    Input Ranges (switch-selectable)
    TC Type         Temperature Range                   Accuracy
    J                    -210 to 760°C (-346 to 1400°F)           ±0.5°C
    K                     200 to 1372°C (-328 to 2502°F)        ±0.5°C
    T                    -260 to 400°C (-436 to 752°F)             ±0.5°C
    R                      -50 to 1768°C (-58 to 3214°F)           ±1.0°C
    S                      -50 to 1768°C (-58 to 3214°F)           ±1.0°C
    E                    -200 to 1000°C (-328 to 1832°F)        ±0.5°C
    B                     260 to 1820°C (500 to 3308°F)          ±1.0°C
    N                   -230 to 1300°C (-382 to 2372°F)        ±0.5°C
    Span adjust: Full range. 100°C or 3mV minimum span recommended.
    Zero adjust: 0 to 90 % of full range.

    Thermocouple Linearization: On/off selectable.

    Thermocouple Break Detection: TC sensor failure can be configured for either upscale or downscale.

    Cold Junction Compensation (CJC) Control: On/off selectable.

    milliVolt Input

    Input Range
    Ranges: ±15.6, ±31.3, ±62.5mV, 0 to 0.125, 0.25, 0.5, 1.0V DC.
    Span adjust: 10 to 100% of range.
    Zero adjust: 0 to 90% of range.

    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: Inputs, outputs, and individual channels are isolated from each other for common-mode voltages up to 250V AC, or 354V DC off ground, on a continuous basis (will withstand 1500V AC dielectric strength test for one minute without breakdown).

    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 thermocouple input types offer flexibility to fit many applications.
    • DIP switch-configuration and self-ranging technologies speed installation without pots, jumpers, or software.
    • Linearizer function provides an output that is linear to the temperature or millivolt signal.
    • Isolation eliminates ground loops, reduces noise, and blocks transient signals.
    • 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.
    • CJC control only requires a millivolt source to calibrate modules
    • High-resolution sigma-delta A/D converters deliver superior accuracy for reliable measurements.
    • Operating temperature range: -25 to 75°C (-13 to 167°F)

     

  • Tech Papers

    How to use Thermocouple Transmitters to Monitor Temperatures in Paint Systems - 8400818
    This document illustrates using Acromag’s TT330 Series to monitor high temperatures in an automotive paint curing oven and transmit to the existing PLC 4-20mA input card/software setup. Defining the Problem The area around an auto manufacturer’s paint curing ovens is at elevated temperatures affecting the performance of locally installed instrumentation. Placing signal conditioners rated for...
    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

    Specs & Catalogs

    Manuals

    655T, 656T User Manual (Log in to download the file)

  • Accessories

  • Additional information

    Additional information

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

    655T-0600: single I/O channel; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, 655T-0600-C: single I/O channel; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, with factory calibration. Specify ranges at checkout, 656T-0600: dual I/O channels; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, 656T-0600-C: dual I/O channels; TC (J, K, T, R, S, E, B, N) or ±1V DC input, 4 to 20mA DC output, with factory calibration, 656T-E600: dual I/O channel economy version; TC J, K and 0-125mV input (no linearization); 4 to 20mA DC output (no inverse proportional (reverse) output), 656T-E600-C: dual I/O channel economy version; TC J, K and 0-125mV input (no linearization); 4 to 20mA DC output (no inverse proportional (reverse) output, with factory calibration. Specify ranges at checkout

    Product Series

    600 Series

    Configuration

    DIP-Switch Configuration

    Power

    Loop Power