7NG0420-1BB00-0AA0 SIEMENS Exclusive SITRANS TR420 Temperature Transmitter Original Brand New

7NG0420-1BB00-0AA0 SIEMENS Exclusive SITRANS TR420 Temperature Transmitter Original Brand New

The SIEMENS 7NG0420-1BB00-0AA0 SITRANS TR420 is a premium rail-mounted temperature transmitter designed for reliable industrial measurement applications. This device combines advanced functionality with robust design, ensuring accurate and consistent readings across a wide variety of temperature sensors. Built for demanding environments, the TR420 features two independent input circuits that allow redundant operation, offering high input availability and improved reliability in critical processes. With HART 7 communication, this transmitter can be integrated seamlessly into modern automation systems while supporting efficient configuration and diagnostics.

The transmitter offers a universal input for RTD sensors, including Pt100 IEC 60751 three-wire configurations, enabling flexible installation options for engineers and plant operators. Thanks to galvanic isolation and a stable 2-wire output, the SITRANS TR420 ensures signal integrity while protecting against interference. The absence of a housing makes it suitable for both head-mounted and rail-mounted applications, enhancing versatility across industrial settings where space optimization and adaptability are crucial.

Overview

Key highlights of the SITRANS TR420 include its robust HART communications interface, simple rail mounting, and the ability to detect input drift for enhanced accuracy. Two configurable input channels can operate independently, ensuring continuous availability even if one sensor fails. The transmitter complies with international certifications including CE, RCM, FM, KC, EAC, and CSA, making it suitable for global operations.

Function

Configuration of the SITRANS TR420 is achieved through HART, either via handheld communicators or SIMATIC PDM software connected with a HART modem. Settings are stored securely in non-volatile memory (EEPROM), guaranteeing consistent performance even after power cycles. Diagnostic features are indicated with LEDs: green for proper operation, flashing red for external sensor issues, and steady red for internal faults. This visual feedback simplifies troubleshooting and ensures reduced downtime.

For verification, an ammeter can be connected directly to the test terminals without disrupting ongoing measurements, allowing engineers to validate signals quickly and safely. This feature underscores the transmitter’s focus on reliability, efficiency, and user-friendly operation in continuous process environments.

Product Code: 7NG0420-1BB00-0AA0

More Siemens products at Turll.com