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Product short description:
  • Potentometer/slidewire: 100 to 100k ohms
  • Thermistor: 0 to 100k ohms, -50 to 200°C
  • 4 to 20mA DC
  • 12-32V DC power
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The TT234 model is a space-saving two-wire transmitter that isolates and converts a resistive sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection. The transmitter provides sensor excitation plus performs linearization, lead-wire compensation, and lead-break detection.

Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.

Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile temperature measurement device. These transmitters can withstand harsh industrial environments and operate reliably across a wide temperature range with very low drift. They feature RFI, EMI, ESD, EFT, and surge protection plus low radiated emissions.

Performance Specifications

IMPORTANT: To prevent damage or errors from grounded PCs and surges, Acromag strongly recommends the use of their USB-ISOLATOR when configuring a TT230 Series transmitter.

USB Interface

USB Connector: USB Mini-B type socket, 5-pin
USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible
USB Transient Protection: Transient voltage suppression on power and data lines
USB Cable Length: 5.0 meters maximum
Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system

Input

Default Configuration: Pot/slidewire, 0% to 100% input, 4-20mA output, downscale break detect, medium filter.
Input Configuration:
Two- or three-wire sensor input connections.
User-configurable thermistor linearization table has preset curves for resistances below at 25°C.
Programs in °C, °F, °K, or ohmic integer values only

Input Ranges
Input  Type                             Input Range                                     Accuracy
Potentiometer                  0 to 100% (100 to 100KΩ)         < ±0.01% of span
Rheostat                         100 to 1MΩ                                          < ±0.5% of input
Thermistor 2252Ω       -40 to 100°C (-40 to 212°F)           < ±0.05°C (±0.09°F)
Thermistor 2752Ω       -40 to 100°C                                       < ±0.05°C (±0.09°F)
Thermistor 2795Ω       -40 to 100°C                                       < ±0.05°C (±0.09°F)
Thermistor 3kΩ            -40 to 100°C                                       < ±0.05°C (±0.09°F)
Thermistor 5kΩ            -40 to 100°C                                       < ±0.05°C (±0.09°F)
Thermistor 10kΩ         -40 to 100°C                                        < ±0.05°C (±0.09°F)
Thermistor 30kΩ         -40 to 100°C                                        < ±0.05°C (±0.09°F)
Custom thermistor    100 to 1MΩ                                           < ±0.5% of input

Input Scaling Adjust:
Zero: 0 to 95% of range, typical
Full scale: 5 to 100% of full scale range, typical
Excitation Voltage:
Thermistor/rheostat: 1.25V DC, typical
Potentiometer: 0.3V DC, limited to 3.35mA, typical
Lead Break (Sensor Burnout) Detection: Configurable for either upscale or downscale on thermistor or rheostat inputs. Downscale only on potentiometer/slidewire inputs.

Output

Output Range: 4 to 20mA DC
Under-range capability 3.5mA
Over-range capability 24mA
Output Compliance:
Rload = (Vsupply – 11V) / 0.020A
Rload = 0 to 650 ohms @ 24V DC
Output DAC Resolution: 16-bit D/A converter
Output Accuracy: Better than ±0.05% of span, typical (±0.1% max) for nominal input spans. Includes the effects of repeatability, terminal point conformity, and
linearization, but does not include sensor error.
Ambient Temperature Effect: Better than ±0.008% per °C of input span or ±80ppm/°C, typical. Includes the combined effects of zero and span drift over temperature.

Output Response Time (for step input change)
No filter                 11ms
Low filter              40ms
Medium filter    150ms
High filter         1200ms

Environmental

Operating temperature: -40 to 80°C (-40° to 176°F)
Storage temperature: -40 to 85°C (-40 to 185°F)
Relative humidity: 5 to 95% non-condensing
Power Requirement: 12-32V DC SELV (Safety Extra Low Voltage), 24mA maximum
Shock and Vibration Immunity:
Vibration: 4g, per IEC 60068-2-6
Shock: 25g, per IEC 60068-2-27
Electromagnetic Compatibility (EMC) Compliance:
Radiated Emissions: BS EN 61000-6-4, CISPR 16
RFI: BS EN 61000-6-2, IEC 61000-4-3
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6
ESD: BS EN 61000-6-2, IEC 61000-4-2
EFT: BS EN 61000-6-2, IEC 61000-4-4
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5
Approvals:
CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2. II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C

Physical

General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail
Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure
I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire
Dimensions: 12.5 x 114.5 x 99.0 mm (0.5 x 4.51 x 3.90 inches)
Shipping Weight: 0.22 kg (0.5 pounds) packed

  • Easy setup and digital calibration via USB with Windows configuration software
  • Interfaces 100-100kΩ potentiometer/slidewire and 100-1MΩ NTC thermistor/rheostat inputs
  • Customizable thermistor linearization table with preset curves for popular resistances
  • 1500V isolation between input/output circuits
  • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
  • High accuracy, linearity, stability, and reliability
  • Supports normal or reverse-acting output
  • Supports sink or source output wiring
  • User-selectable filtering (none, low, med., high)
  • Fast response (as low as 11ms)
  • Selectable upscale or downscale operation for sensor errors and lead-break detection
  • NAMUR-compliant output loop current
  • Shock (25g) and vibration (4g) resistant
  • Wide ambient operation (-40 to 80°C)
  • CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals

Manuals

TT234 User Manual (Log in to download the file)

TT230 Series Windows Configuration Software (Log in to download the file)
Agility Config Tool (Tethered) (Log in to download the file)
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    • 1500V AC / 2100V DC isolation
    • No drivers required
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Additional information

Weight 8 oz
Dimensions 2.4 × 1.85 × 0.925 in
Part Number

USB-Isolator: includes USB cable

  • Description

    This compact, industrial-grade isolator provides a high-voltage isolation barrier between a computer and a connected USB device.

    The isolation protects equipment from electrical surges and transient voltage spikes. It also eliminates ground loop currents flowing between the PC and peripherals which can cause damage and inaccurate measurements. Additionally, isolation minimizes conducted noise from static discharge, magnetic fields, and radio frequency interference.

    Acromag’s USB isolator is very easy to use. The isolator inserts in-line with the USB connection and operates transparently. No special software drivers are required. The unit receives power from the PC’s USB port and isolates that power to the connected device. High noise immunity and low radiated emissions ensure reliable data transfer in sensitive applications.

    A number of high-performance features help provide convenient and dependable operation. The green LED indicates that power is being received and blinks if the connected device draws too much current. An internal jumper lets you switch from Full Speed (12 Mbps) to Low Speed (1.5 Mbps) communication. The reset button offers a simple way to reinitialize a connected device without breaking the cable connection. High-retention USB sockets keep cables securely attached under shock and vibration.

  • Features & Benefits

    • Easy setup and digital calibration via USB with Windows configuration software
    • Interfaces 100-100kΩ potentiometer/slidewire and 100-1MΩ NTC thermistor/rheostat inputs
    • Customizable thermistor linearization table with preset curves for popular resistances
    • 1500V isolation between input/output circuits
    • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
    • High accuracy, linearity, stability, and reliability
    • Supports normal or reverse-acting output
    • Supports sink or source output wiring
    • User-selectable filtering (none, low, med., high)
    • Fast response (as low as 11ms)
    • Selectable upscale or downscale operation for sensor errors and lead-break detection
    • NAMUR-compliant output loop current
    • Shock (25g) and vibration (4g) resistant
    • Wide ambient operation (-40 to 80°C)
    • CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals
  • Specs & Data Sheets

    Manuals

    TT234 User Manual (Log in to download the file)

  • Software

    TT230 Series Windows Configuration Software (Log in to download the file)
    Agility Config Tool (Tethered) (Log in to download the file)
  • Accessories

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      • Tethered Agility Config Tool mobile application
      • For Acromag SP Series Signal Splitters and most TT Series Transmitters
      • Download available on Google Play for free.
      • Download Windows configuration software from the software tab below.
      Read more
    • 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
      $95$245
      Select options
    • Compare

      TTC-SIP: Software

      • Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
      • Includes configuration sofware CD-ROM (5040-944), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
      • Easy setup and digital calibration via USB with Windows configuration software.
      • Download the configuration software only from the Software Tab below
      $40$160
      Select options
    • Compare

      USB Isolator

      • USB-powered, USB 2.0 and 1.1 compatible
      • 1500V AC / 2100V DC isolation
      • No drivers required
      $99
      Select options
  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 2.4 × 1.85 × 0.925 in
    Part Number

    USB-Isolator: includes USB cable