7NG0450-0BA01-0BF0-ZE27 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

7NG0450-0BA01-0BF0-ZE27 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

The SIEMENS 7NG0450-0BA01-0BF0-ZE27 SITRANS TF420 is a highly reliable temperature transmitter engineered for demanding industrial applications. With its robust dual chamber enclosure, this device is specifically designed for wall or pipe mounting, ensuring secure and versatile installation in various operating conditions. It features two separately configurable inputs, along with a galvanically isolated 2-wire output, providing enhanced flexibility and operational safety. By utilizing the HART communication interface (4 … 20 mA), the SITRANS TF420 guarantees seamless integration into modern automation and process control systems.

Constructed with a durable die-cast aluminum housing, the transmitter is built to withstand harsh environments. It is certified for intrinsic safety (Ex i) and non-incendive field wiring (NIFW), further enhancing its reliability in critical settings. With 2 x M20 x 1.5 connections, a closed design, and NEPSI (China) certification, the SITRANS TF420 combines engineering excellence with user-oriented design.

Overview

The SITRANS TF420 offers a universal input that supports a wide range of temperature sensors, including RTDs, thermocouples, and resistance or voltage signals. Two independent input circuits allow for redundant operation, ensuring continuous monitoring and high input availability. Input drift detection, combined with automatic switchover between inputs, guarantees uninterrupted measurement accuracy even in the event of sensor failure.

Function

Communication and configuration are handled through HART protocol V7, SIMATIC PDM software, Profibus PA, or optional local operation. This flexibility allows easy parameterization via PC, handheld communicator, or directly on the device. The SITRANS TF420 amplifies and linearizes sensor signals, delivering a stable 4 to 20 mA current output that is temperature-linear and galvanically isolated. An internal cold junction compensates for thermocouple measurements, ensuring accurate and dependable results.

Principle of Operation

Engineered for continuous performance, the transmitter automatically detects sensor interruptions or short circuits. In case of primary sensor failure, the device seamlessly switches to the backup input without disrupting the output signal. This redundancy, along with diagnostic capabilities and test terminals for 4–20 mA verification, ensures maximum uptime and simplified maintenance. Whether in chemical plants, power facilities, or process industries, the SITRANS TF420 guarantees efficiency, reliability, and long-term durability.

Product Code: 7NG0450-0BA01-0BF0-ZE27

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