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SITRANS TR420 Temperature Transmitter

Brand: Siemens AG
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SITRANS TR320/420 is designed to support all common resistance thermometers and thermocouples.

It also evaluates resistance and millivolt signals.

Setup is quick and easy with SIMATIC PDM or a handheld communicator.

Both temperature transmitters SITRANS TR320 and TR420 combine perfect measurement and intelligence for every temperature and condition.

The reliability of the SITRANS TR420 is exemplified by the dual sensor input with a 4-wire sensor connection and hot backup function.

In case of a sensor failure, the transmitter seamlessly switches to the second sensor allowing for continuous data recording without any loss.
Features
  • Compact design
  • Flexible mounting and center hole allow you to select your preferred type of installation
  • Galvanic isolation
  • Test terminals for ammeter
  • Diagnostics LED (green/red)
  • Input monitoring wire break and short-circuit
  • Self-monitoring
  • Configuration status stored in EEPROM
  • SIL2/3 (with order note C20)
  • Expanded diagnostic functions, such as slave pointer, operating hours counter, etc.
  • Special characteristic
  • Electromagnetic compatibility according to DIN EN 61326 and NE21
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SITRANS TR320/420 is designed to support all common resistance thermometers and thermocouples.

It also evaluates resistance and millivolt signals.

Setup is quick and easy with SIMATIC PDM or a handheld communicator.

Both temperature transmitters SITRANS TR320 and TR420 combine perfect measurement and intelligence for every temperature and condition.

The reliability of the SITRANS TR420 is exemplified by the dual sensor input with a 4-wire sensor connection and hot backup function.

In case of a sensor failure, the transmitter seamlessly switches to the second sensor allowing for continuous data recording without any loss.
Features
  • Compact design
  • Flexible mounting and center hole allow you to select your preferred type of installation
  • Galvanic isolation
  • Test terminals for ammeter
  • Diagnostics LED (green/red)
  • Input monitoring wire break and short-circuit
  • Self-monitoring
  • Configuration status stored in EEPROM
  • SIL2/3 (with order note C20)
  • Expanded diagnostic functions, such as slave pointer, operating hours counter, etc.
  • Special characteristic
  • Electromagnetic compatibility according to DIN EN 61326 and NE21
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Specifications

Brand

Supply Voltage

  • Without explosion protection: (nonEx) 7.5 to 48 Vdc
  • With explosion protection: (Ex i) 7.5 to 30 Vdc

Maximum Power Loss

  • ≤ 850 mW

Programming

  • HART

Response Time

  • HART: ≤ 75 milliseconds

Type of Connections

  • 2-Wire, 3-Wire or 4-Wire

Input Current

  • < 0.15 mA

Fault Detection Time

  • RTD: ≤ 75 millisecond
  • 3-Wire and 4-Wire: ≤ 2 000 milliseconds

Thermocouple Type

  • Type B, E, J, K, L, Lr, N, R, S, T, U, W3, W5, LR

Ambient Temperature

  • -50° to 85° C
  • -58° F to 185° F

Degrees of Protection

  • Enclosure: IP68
  • Terminals: IP00

Weight

  • 50 g

Certifications & Approvals

  • DEKRA 17ATEX0116 X
  • IECEx dEK 17.0054X
  • A5E43700604A-2018X
  • ATEX
  • IECEx
  • CSA 1861385
  • FM18CA0024
  • FM18US0046

Relative Humidity

  • < 99 % (No Condensation)

Measuring Range

  • Unipolar: -100 to 1700 mV
  • Bipolar: -800 to 800 mV

Input Resistance

  • 0 MΩ
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Applications

  • SITRANS TR420 Transmitters Can Be Used In All Sectors. 
  • Its Compact Size Means That It Can Be Installed In Connection Heads Of Type B Or Larger.
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