Potentiometer / Thermistor Input 4-Wire Transmitter TT334

The TT334 models is four-wire transmitter that isolates and converts a resistive sensor input to a proportional 4-20mA signal. DC Current and Voltage output are both supported on single model.

The Acromag TT334 is a Potentiometer / Thermistor Input 4-Wire Transmitter.

Firstly, with a USB configuration, it isolates and converts Potentiometer / Slidewire Thermistor Inputs to a Universal Current/Voltage output. 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.

Secondly, Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software. A USB Isolator is strongly recommended when calibrating this unit.

Thirdly, 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.

Features of the Potentiometer / Thermistor Input 4-Wire Transmitter TT334 includes:

  • Easy setup and digital calibration via USB with Windows configuration software
  • Interfaces 100-100kΩ potentiometer/slidewire and 0-500KΩ NTC thermistor/thermostat inputs
  • Customisable thermistor linearisation 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



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