7NG0440-0BA01-0BF0-ZE27 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

7NG0440-0BA01-0BF0-ZE27 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

The SIEMENS 7NG0440-0BA01-0BF0-ZE27 SITRANS TF420 is a high-quality temperature transmitter designed to deliver maximum precision and reliability in industrial environments. Built with a rugged die-cast aluminum housing, this transmitter is suitable for both wall and pipe mounting applications, ensuring flexibility in installation across diverse process conditions. It supports two independently configurable inputs and a galvanically isolated 2-wire output, providing excellent versatility for monitoring and control tasks.

The SITRANS TF420 is equipped with HART communication protocol (4 … 20 mA), enabling seamless integration with process control systems and advanced diagnostic tools. The device supports a wide range of input types, including RTD Pt100 sensors according to IEC 60751, thermocouples, and voltage or resistance signals, making it adaptable to numerous temperature measurement applications. Thanks to intrinsic safety (Ex i) and non-incendive field wiring approvals, it is suitable for deployment in hazardous areas without compromising safety standards.

Overview

The transmitter is available in both dual chamber and single chamber enclosures, offering configurations to match specific installation needs. With universal inputs and support for redundant operation, the device ensures continuous measurement availability and reliable performance even in critical environments. Input drift detection provides early warnings of potential sensor failures, safeguarding process integrity.

Function

Configuration can be performed via PC using SIMATIC PDM, a HART communicator, or Profibus PA. An optional local operation interface on the unit allows quick setup of essential functions without additional tools. The SITRANS TF420 processes two independent sensor signals, amplifies and linearizes them, and provides galvanically isolated outputs. Cold junction compensation is integrated for thermocouple measurements, ensuring accuracy across varying conditions.

Principle of Operation

The device outputs a linear 4 to 20 mA signal while also offering digital communication through HART or Profibus PA for online diagnostics, measured value transmission, and parameter configuration. If the primary input fails, the transmitter seamlessly switches to the secondary input, maintaining uninterrupted operation. Built-in test terminals allow direct measurement of current without disturbing the loop, simplifying maintenance and calibration activities. The SITRANS TF420 is engineered to combine accuracy, robustness, and flexibility, making it an ideal choice for demanding industrial temperature measurement tasks.

Product Code: 7NG0440-0BA01-0BF0-ZE27

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