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Product short description:
  • Potentiometer / slidewire input
  • Universal current/voltage output
  • 12-32V DC local/bus power
  • USB configuration

The TT334 model is a space-saving four-wire transmitter that isolates and converts a resistive sensor input to a proportional control signal. DC current and voltage output are both supported on a single model.

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The TT334 model is a space-saving four-wire transmitter that isolates and converts a resistive sensor input to a proportional control signal. DC current and voltage output are both supported on a single model. An optional DIN rail bus can deliver primary or redundant power to multiple units without wiring.

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 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 TT330 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.

Maximum Cable Length: 5.0 meters.

Driver: Not required. Uses Windows HID drivers.

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.

Lead Break (Sensor Burnout) Detection: Configurable for either upscale or downscale on thermistor or rheostat inputs. Downscale only on potentiometer/slidewire inputs.

Excitation Voltage
Thermistor/rheostat: 1.25V DC, typical.
Potentiometer: 0.3V DC, limited to 3.35mA, typical.

Output

Output Range:
Range                    Over-Range                 Resolution
±10V                            ±10.5V                       1 part in 62558
±5V                               ±5.25V                      1 part in 31278
0 to 10V              –0.5527 to +10.5V        1 part in 59293
0 to 5V              –0.27634 to +5.25V        1 part in 60414
±20mA                        ±21mA                      1 part in 62400
0 to 20mA          –1.1054 to 21mA          1 part in 58732
4 to 20mA          –1.1054 to 21mA          1 part in 46984

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.

Output Load
Voltage output: 1K ohms minimum.
Current output: 0-525 ohms.

Output Response Time (for step input change)
No filter: 21ms Medium filter: 150ms.
Low filter: 40ms High filter: 1200ms.

Output Ambient Temperature Drift
Better than ±80ppm/°C (±0.0080%/°C).

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), 1.3W maximum.

Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input, output, and power (3-way).

Shock and Vibration Immunity
Vibration: 4g, per IEC 60068-2-6.
Shock: 25g, per IEC 60068-2-27.

Approvals
CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD. ATEX / IECEx certified Zone 2. II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C.

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.

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: 17.5 x 114.5 x 99.0 mm (0.7 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 0-500KΩ NTC thermistor/rheostat inputs
  • Customizable thermistor linearization table with preset curves for popular resistances
  • Universal output connections support ranges up to ±21mA or ±10.5V DC without rewiring
  • Pluggable terminals for convenient wiring
  • High accuracy, linearity, stability, and reliability
  • User-selectable filtering (none, low, med., high)
  • Fast response (as low as 21ms)
  • Supports normal or reverse-acting output
  • Selectable upscale or downscale operation for sensor faults and lead-break detection
  • Bus power, local power, or both for redundant power supplies
  • 1500V isolation, 3-way (power, input, output)
  • 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

TT334 User Manual (Log in to download the file)

Agility Config Tool (Tethered) (Log in to download the file)
TT300 Series Windows Configuration Software (Log in to download the file)
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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 0-500KΩ NTC thermistor/rheostat inputs
    • Customizable thermistor linearization table with preset curves for popular resistances
    • Universal output connections support ranges up to ±21mA or ±10.5V DC without rewiring
    • Pluggable terminals for convenient wiring
    • High accuracy, linearity, stability, and reliability
    • User-selectable filtering (none, low, med., high)
    • Fast response (as low as 21ms)
    • Supports normal or reverse-acting output
    • Selectable upscale or downscale operation for sensor faults and lead-break detection
    • Bus power, local power, or both for redundant power supplies
    • 1500V isolation, 3-way (power, input, output)
    • 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

    TT334 User Manual (Log in to download the file)

  • Software

    Agility Config Tool (Tethered) (Log in to download the file)
    TT300 Series Windows Configuration Software (Log in to download the file)
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      Read more
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      • Download the configuration software only from the Software Tab
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  • Additional information

    Additional information

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

    USB-Isolator: includes USB cable