7NG0450-0BA01-0AF0-ZE00 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

7NG0450-0BA01-0AF0-ZE00 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

The SIEMENS 7NG0450-0BA01-0AF0-ZE00 SITRANS TF420 is a premium temperature transmitter designed for high reliability in industrial applications. Built with a rugged dual-chamber die-cast aluminum enclosure, this unit offers secure wall or pipe mounting, making it suitable for a wide range of demanding environments. Its galvanically isolated 2-wire output with HART (4 … 20 mA) ensures consistent measurement signals and dependable integration into process automation systems.

Engineered for flexibility, the SITRANS TF420 allows configuration of two separate input circuits, enabling redundant operation for higher availability and improved safety. Input drift detection ensures measurement reliability over time, while its universal compatibility supports resistance thermometers (RTDs), thermocouples, millivolt, and resistance signals. The transmitter is globally approved for industrial use, with certifications including CE, UKCA, and RCM, making it a trusted solution across diverse industries.

Overview

The SITRANS TF420 is available in both dual-chamber and single-chamber enclosures. It features a two-wire HART communication interface, offering universal input support for virtually all common temperature sensors. Its design allows the connection of independent circuits, making it ideal for applications requiring redundancy and reliable performance. With its robust construction and intelligent electronics, the device ensures long-term stability in temperature monitoring and control.

Function

Configuration is seamless via PC, HART Communicator, or SIMATIC PDM software. Optional local operation enables fast adjustment of key parameters directly on the device. The transmitter’s operation principle involves amplification and linearization of sensor signals, with galvanic isolation between input and output. An internal cold junction is included for thermocouple measurements. The SITRANS TF420 outputs a stable current from 4 to 20 mA, and its HART/Profibus PA version supports advanced digital communication for diagnostics, measured value transmission, and online configuration.

Principle of Operation

The transmitter continuously monitors sensor inputs and automatically switches to the secondary input in case of interruption or short-circuit detection. This built-in backup functionality prevents downtime and ensures uninterrupted operation. Direct measurement of 4 to 20 mA signals can be performed using its test terminals without breaking the output loop, simplifying maintenance and calibration.

Product Code: 7NG0450-0BA01-0AF0-ZE00

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