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Product short description:
  • Multi-range 0Hz to 100KHz frequency input
  • Multi-range 0Hz to 3KHz PWM input
  • 4-20mA output (sink/source)
  • 12-32V DC power
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The TT239 model is a space-saving two-wire transmitter that isolates and converts a frequency, pulse, or pulse-width modulation (PWM) input to a proportional 4-20mA signal. You can select to measure either the input frequency or the duty cycle. Power is received from the output loop current or a DC supply when using a three-wire connection.

High-voltage isolation separates the input from the output circuit. Isolation protects from surges, reduces noise, and eliminates ground loop errors.

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 frequency 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/Calibration:
±5.0V Square Wave
Input Threshold = Bipolar 0.0V
Hysteresis ±25mV
Measurement = Frequency
Pull Up/Down = Disabled
Excitation = Enabled
0Hz Cutoff = 0.5Hz
Sample Average = 1
Output Range = 4-20mA
I/O Scaling = 0Hz to 10KHz, Normal Acting
Output Update = 100ms

Frequency Input: Configurable for any range from 0Hz to 100KHz. Accepts unipolar (non-zero crossing) or bipolar (zero crossing) input signals. 0.5Hz minimum span. 10μs minimum pulse width.

Input Ranges
Frequency Input          Output Update      Input Resolution     Typical Accuracy
0 to 100Hz                                 Any rate               1 part in 60000                  ±0.05Hz
0 to 1KHz                                   Any rate               1 part in 6000                     ±0.5Hz
0 to 5KHz                                   Any rate               1 part in 1200                     ±1Hz
0 to 10KHz                                   10ms                  1 part in 60000                   ±200Hz
0 to 10KHz                                 100ms                  1 part in 600000                ±20Hz
0 to 10KHz                               1000ms                  1 part in 6000000             ±2Hz
0 to 100KHz                                 10ms                  1 part in 60000                   ±400Hz
0 to 100KHz                               100ms                  1 part in 600000                ±40Hz
0 to 100KHz                             1000ms                 1 part in 6000000              ±4Hz

PWM Input                            Cycle                            Input                             Typical
Carrier Freq                         Range                        Resolution                   Accuracy
0 to 100Hz                                1 to 99%               1 part in 60000                  ±0.02%
0 to 1KHz                                10 to 90%              1 part in 6000                     ±0.2%
0 to 3KHz                               20 to 80%               1 part in 1200                     ±2.0%

Input Scaling Adjust:
Zero: Adjustable over 0 to 99% of full-scale input
Full scale: Adjustable over 0.5Hz to 100KHz
Cut-off frequency: Adjustable over 0.01Hz to 100KHz
Input Pull-up/Pull-down (internal, software-select):
Configurable 12.4KΩ pull-up to +4V and 1KΩ pulldown to –FRTN, or disabled. 15V DC maximum input
4V pull-up with ±28mV hysteresis or 3V when ±84mV
Unipolar Signal Configuration:
Amplitude: 0 to 3V DC min., 0 to 170V DC max
Thresholds: Configurable for 1.6V DC (±25mV hysteresis) or 5V DC (±83mV hysteresis), typical
Bipolar Signal Configuration:
Amplitude: ±50 to ±200mV min. (depending on range and hysteresis), 120Vrms max. (±170V DC)
Thresholds: 0mV nominal (±25 or ±83mV hysteresis)

Output

Output Range: 4 to 20mA DC, wired as sink or source
Under-range capability 3.6mA
Over-range capability 24mA
Output Compliance:
Rload = (Vsupply – 12V) / 0.020A
Rload = 0 to 600 ohms @ 24V DC
Output DAC Resolution: 16-bit D/A converter
Output Update: Software configurable from 10ms to 5000ms. Determines the rate at which the output signal is updated, unless optionally overridden.
Output Settling Time: 1ms, 0% to 98% for a step-change in input, typical
Output Accuracy: Better than ±0.05% of span, typical (±0.1% max) for 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 ±0.0020% per °C of input span or ±20ppm/°C, typical. Includes the combined effects of zero and span drift over temperature

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
Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input and output circuits
Shock and Vibration Immunity:
Vibration: 4g, per IEC 60068-2-64
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
  • Measures frequency or duty cycle and interfaces many input types up to 100KHz
  • Accepts input amplitudes up to 120Vrms (±170V DC, unipolar or bipolar)
  • Adjustable 0Hz cut-off, sample averaging, debounce, and output update time
  • Software configurable pull-up/down resistors ( 4V DC input pull-up for sensors/tranducers)
  • 1500V isolation between input/output circuits
  • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
  • Fast response time and high accuracy
  • Supports normal or reverse-acting output
  • Supports sink or source output wiring
  • 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

Specifications

Manuals

TT239 User Manual (Log in to download the file)

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

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    • Download available on Google Play and iTunes for free.
    • Download Windows configuration software from the software tab below.
    Read more
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    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
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    USB Isolator

    • USB-powered, USB 2.0 and 1.1 compatible
    • 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.

  • Features & Benefits

    • Easy setup and digital calibration via USB with Windows configuration software
    • Measures frequency or duty cycle and interfaces many input types up to 100KHz
    • Accepts input amplitudes up to 120Vrms (±170V DC, unipolar or bipolar)
    • Adjustable 0Hz cut-off, sample averaging, debounce, and output update time
    • Software configurable pull-up/down resistors ( 4V DC input pull-up for sensors/tranducers)
    • 1500V isolation between input/output circuits
    • Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
    • Fast response time and high accuracy
    • Supports normal or reverse-acting output
    • Supports sink or source output wiring
    • 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

    Specifications

    Manuals

    TT239 User Manual (Log in to download the file)

  • Software

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

    • Compare

      Agility Config Tool

      • Agility Config Tool mobile application.
      • Download available on Google Play and iTunes 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