SIEMENS SITRANS TR420 rail-mounted temperature transmitter with dual configurable inputs, HART communication, and global safety certifications.
The SIEMENS 7NG0420-1BB00-0NA0-ZC20 SITRANS TR420 is a premium temperature transmitter designed for precision, reliability, and safety in industrial applications. Engineered for rail mounting, this device supports two fully independent and configurable inputs, offering high operational availability through redundancy. With a galvanically isolated 2-wire output and full HART (4–20 mA) compatibility, the transmitter delivers seamless integration with modern process automation systems. The SITRANS TR420 is optimized for a wide range of temperature sensors including RTD Pt100 (IEC 60751, 3-wire), providing flexible usage across industries that demand accuracy and continuous performance.
One of the transmitter’s greatest strengths is its safety compliance. The device meets strict international standards such as ATEX, IECEx, CSA, FM, NEPSI, Inmetro, UKEX, and EACEx, ensuring intrinsic safety (Ex i), increased safety (Ex ec), and non-incendive protection for hazardous zones. This makes it highly suitable for oil and gas, petrochemical, power generation, and other industries where reliability in harsh conditions is critical. The compact design, available without enclosure for either head-mounted or rail-mounted installation, ensures ease of integration into existing systems without compromising functionality.
The SITRANS TR420 is a 2-wire rail transmitter featuring HART 7 communications. It is designed for universal input, allowing compatibility with nearly all sensor types. The dual-input capability enables redundant operation, increasing uptime and providing security against sensor drift or failure. Additional features include input drift detection and easy configurability via HART modem or handheld communicator using SIMATIC PDM software. Configuration settings are securely stored in the device’s non-volatile memory for consistent performance over time.
Once properly connected, the transmitter outputs a linearized, temperature-proportional current signal. Diagnostic LEDs provide clear visual status: green for correct operation, flashing red for external errors such as wiring faults, and solid red for internal issues. Maintenance and verification are simplified by the ability to connect an ammeter at any time using test terminals, allowing current output monitoring without disrupting the loop. These diagnostic and verification features significantly reduce downtime and support efficient plant operations.
Product Code: 7NG0420-1BB00-0NA0-ZC20
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| SKU / Model | 7NG0420-1BB00-0NA0-ZC20 |
|---|---|
| Weight | 0.122 kg |
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