7NG0450-0BA01-0CF0-ZE27 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

7NG0450-0BA01-0CF0-ZE27 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

The SIEMENS SITRANS TF420 with product code 7NG0450-0BA01-0CF0-ZE27 is a highly reliable temperature transmitter designed for precision and safety in industrial applications. It is built with a robust dual-chamber die-cast aluminum enclosure that provides protection in harsh operating environments, including explosion-proof areas. The device supports two fully independent and configurable inputs, which can be used in redundant operation, ensuring high availability and increased reliability for continuous monitoring of temperature processes. With a galvanically isolated 2-wire output and HART communication protocol, the SITRANS TF420 ensures stable signal transmission and seamless integration into advanced automation systems.

Engineered for flexibility, the SITRANS TF420 can be configured through a PC, HART 7 communicator, Profibus PA, or optionally via local operation directly on the device. This versatile setup makes commissioning and adjustments straightforward. Advanced diagnostic functions such as input drift detection, sensor short-circuit monitoring, and automatic switching between dual inputs minimize downtime and safeguard critical operations.

Overview

The SITRANS TF420 is available in both single and dual-chamber versions. It is a 2-wire transmitter with a universal input that supports a wide range of temperature sensors, including RTDs, thermocouples, resistance, and millivolt signals. This universality makes it suitable for complex industrial applications requiring consistent and redundant temperature monitoring.

Function and Operation

The transmitter amplifies and linearizes sensor signals while providing galvanic isolation between input and output. In thermocouple applications, it incorporates an internal cold junction for accuracy. The device outputs a temperature-linear current from 4 to 20 mA, with digital communication available for diagnostics and online parameterization. If a sensor fails, the transmitter automatically switches to the backup input, maintaining uninterrupted operation. Practical test terminals allow technicians to measure current loops without affecting live processes, simplifying maintenance routines.

Product Code: 7NG0450-0BA01-0CF0-ZE27

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