Specifications

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Siemens FI 01 · 2015 US Edition
Temperature Measurement
Transmitters for rail mounting
SITRANS TW four-wire system, universal, HART
2
■ Schematics
Sensor input connections
Connection diagram for the input signal
Channel 1 is the measured variable between the terminals 2 and 3 on the input plug. With a difference or mean-value circuit, the
calculation of the measured value is defined by the type of measurement. Otherwise the measured value is determined via channel
1. The following code is used for the type of measurement:
The short-circuit jumpers shown in the circuits must be inserted
in the respective system on site.
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type of measurement Calculation of measured value
Single channel Channel 1
Differential connection 1 Channel 1 - Channel 2
Differential connection 2 Channel 2 - Channel 1
Mean-value 1
½  (Channel 1 + Channel 2)
© Siemens AG 2015