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Temperatuur

SIEMENS

SITRANS TF320/420 Temperature Transmitter

The SIEMENS SITRANS TF320/420 temperature transmitters can be used for all common resistance thermometers and thermocouples. Resistance-type sensors and millivolt signals can be analyzed, too. The configuration can be quick and easy via SIMATIC PDM, handheld communicator or the optional display with push buttons. Both SIEMENS temperature transmitters, SITRANS TF320, and TF420 stand for reliability, accuracy, and robustness.

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Input PT100
Output 3.8 ... 20.5 mA
Measuring range -200...+850°C
Measuring accuracy See datasheet (Downloads)
Operational temperature -50...+85°C
Degree of protection IP66/67/68

The SIEMENS SITRANS TF320/420 temperature transmitters can be used for all common resistance thermometers and thermocouples. Resistance-type sensors and millivolt signals can be analyzed, too. The configuration can be quick and easy via SIMATIC PDM, handheld communicator or the optional display with push buttons. Both SIEMENS temperature transmitters, SITRANS TF320, and TF420 stand for reliability, accuracy, and robustness.

The two independent sensor inputs of the SITRANS TF420 include a 4-wire sensor connection with a hot backup function, which guarantees true reliability. In case of a sensor failure, the transmitter switches seamlessly to the second sensor, and the values will continuously be recorded without any data losses.

According to the Callendar-van-Dusen method, the sensor calibration plus the additional sensor drift detection (only TF420) ensures high accuracy, accelerated calibration time, and optimal calibration planning. The SIL2 / 3 certification, in conjunction with a variety of Ex approvals, is the perfect solution for your safety-critical applications, even under the most extreme conditions down to -50 ° C.

The service-friendly details make the SITRANS TF320/420 unique: with the help of a millimetre, the 4..20mA loop’s value can be read directly without interrupting the output signal. Thanks to the HART 7 ability, further diagnostic data can be transferred directly to the maintenance staff or read, alternatively, directly at the display with push buttons due to the NE107 conform diagnostics alarm.

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Shirley van der Lugt

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