Sitrans Tr320/Tr420; Application - Siemens SITRANS TH100 Operating Instructions Manual

4.3

SITRANS TR320/TR420

4.3.1

Application

SITRANS TR320
SITRANS TR320 transmitters can be used in all sectors. Their compact design enables simple
mounting on standard DIN rails on-site in protective boxes or in control cabinets. Due to its
universal input stage, the following sensors and signal sources can be connected:
• Resistance thermometer (2-wire, 3-wire, 4-wire connection)
• Thermocouples
• Linear resistance, potentiometer and DC voltage sources
Without HART communication interface:
• The output signal is a load-independent direct current from 4 to 20 mA in accordance with
the input characteristic.
With HART communication interface:
• The output signal is a load-independent direct current from 4 to 20 mA in accordance with
the input characteristic, superimposed by the digital HART signal.
Transmitters of the "intrinsically safe or Zone 2 increased safety" type of protection can be
installed in hazardous areas. The device meets the requirements of the EU Directive 2014/34/EU
(ATEX), the FM and CSA regulations as well as other national approvals, e.g. EACEx, NEPSI,
Inmetro.
SITRANS TR420
SITRANS TR420 transmitters with two inputs can be used in all sectors. Their compact design
enables simple mounting on standard DIN rails on-site in protective boxes or in control cabinets.
Due to its universal input stage, the following sensors and signal sources can be connected:
• 2 resistance thermometers (2-wire, 3-wire, 4-wire connection)
• 2 thermocouples
• 1 thermocouple and 1 resistance thermometer (2-, 3-, 4-wire connection)
• 2 linear resistors, potentiometer and DC voltage sources
The output signal is a load-independent direct current from 4 to 20 mA in accordance with the
input characteristic, superimposed by the digital HART signal.
The dual input mode also supports drift detection of the inputs, whereby maintenance intervals
can be more easily planned.
Transmitters of the "intrinsically safe or Zone 2 increased safety" type of protection can be
installed in hazardous areas. The device meets the requirements of the EU Directive 2014/34/EU
(ATEX), the FM and CSA regulations as well as other national approvals, e.g. EACEx, NEPSI,
Inmetro.
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB
Description
4.3 SITRANS TR320/TR420
43