7NG0420-1BB00-0NA0 SIEMENS Exclusive SITRANS TR420 Temperature Transmitter Original Brand New

7NG0420-1BB00-0NA0 SIEMENS Exclusive SITRANS TR420 Temperature Transmitter Original Brand New

The SIEMENS 7NG0420-1BB00-0NA0 SITRANS TR420 is a versatile rail-mounted temperature transmitter designed for accurate, stable, and reliable process measurement in demanding industrial environments. Built to deliver exceptional performance, this advanced device supports two independent configurable inputs with a galvanically isolated 2-wire output, ensuring maximum availability and safety. With HART communication (4 to 20 mA), the SITRANS TR420 provides seamless integration into automation systems, making it an ideal choice for industries that require precise monitoring and dependable temperature control.

This transmitter supports a wide variety of input signals, including RTD Pt100 sensors according to IEC 60751 in 3-wire configuration, offering excellent compatibility across applications. In addition to its universal input flexibility, the unit also supports redundant operation with dual input circuits, guaranteeing uninterrupted operation even in case of sensor failure. Safety is at the core of the SITRANS TR420, featuring intrinsic safety (Ex i), increased safety for zone 2 (Ex ec), and compliance with multiple global certifications such as ATEX, IECEx, EACEx, CSA, FM, NEPSI, Inmetro, and UKEX.

Overview

The 2-wire transmitter is designed for rail installation with full HART 7 communication capability. Key advantages include input drift detection, redundant input connections, and universal sensor support, making it suitable for a wide range of process industries. Its compact design ensures easy integration, while the high reliability reduces maintenance needs.

Function

The SITRANS TR420 can be configured using a handheld communicator, HART modem, or SIMATIC PDM software. All configurations are stored securely in non-volatile memory (EEPROM). Once connected, it delivers a temperature-linear output signal, while diagnostic LEDs provide immediate status indication. A green LED confirms proper operation, flashing red signals external sensor faults, and solid red indicates internal device errors. The built-in test terminals allow users to connect an ammeter for real-time current verification without interrupting the control loop, ensuring smooth plant operation and easy troubleshooting.

Product Code: 7NG0420-1BB00-0NA0

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