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Two-wire SITRANS TR and Four-wire SITRANS TW

When connected directly in the 4 to 20 mA loop, the SITRANS TR devices require no auxiliary power supply. They are installed in junction boxes or in the control room close to the process, thus permitting centralized access to all connected measurement points.

The separate auxiliary power connection ensures the great flexibility of the SITRANS TW devices in view of the output signals. For example, the SITRANS TW provides not only the most commonly used 4 to 20 mA output signal but can also be configured for 0 –20 mA and 0 –10 V or 2 –10 V via HART protocol.

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