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  • Transmitter for temperature, head mounting for Pt100 2 channel, HART®, SIEMENS Sitrans TH420

Transmitter for temperature, head mounting for Pt100 2 channel, HART®, SIEMENS Sitrans TH420

Type series PA2420

  • EX
  • SIL2
  • HART
Transmitter for temperature, head mounting for Pt100 2 channel, HART®, SIEMENS Sitrans TH420 - PA2420

Features

  • Digital, programmable temperature transmitter with two input channels
  • Uninterruptible redundancy
  • Drift detection of inputs
  • Alarm currents for drift, open circuit and short-circuit individually programmable
  • Digital communication via PDM/EDD and FDT/DTM
  • Diagnostic LED
  • Output signal: 4…20 mA, 2- wire technology, HART®
  • Suitable for installation in connecting heads in accord-ance with DIN, form B

Options

  • Explosion protection for gases and dust
  • SIL2 classification, SIL3 with redundant use of two PA2420

Technical Data

Constructional design
Dimensions: See dimensional drawing, Material: molded plastic vergossen
Degree of protection per EN 60529: Case: IP 68
Terminals: IP 00
Vibration resistance per EN 60068-2-6: 2...25 Hz: 1.6 mm
25...100 Hz: 4g
Weight 50 g
Electrical connection: Screw terminals, max. 1 x 1.52
Input
Type of input: Pt100 per EN 60751
Type of connection: 2 x 3-wire technology
Wire resistance per wire: max. 50 Ω
Detection limit for short-cicuit input: 15 Ω
Min/Max values: For each sensor input,
For each measuring mode: resettable
  For transmitter electronic temperature:
not resettable
Measuring rate: 100 Hz
Resolution: 24 Bit
Output
Signal: Current output, adjust-able: 4…20 mA
Lower limit: 3,5…4 mA
Upper limit: 20...23 mA
Current simulation: 3,5...23 mA
Alarm current: 3,5...23 mA
freely configurable for: - sensor break - sensor short circuit - sensor drift
Digital communication: HART®-protocol
Device driver: EDD for PDM 9.1
Function: - Linear
- Invers
Resolution: ≤ ± 1,6 µA (0,01 % of full output range)
Step response: ≤ 75 ms (typical 70 ms)
Accuracy
Basic accuracy: ≤ 0.04 °C (when using Pt100, class A)
Temperature influence ambient: ≤ 0.002 °C/°C
Influence of supply voltage change: < 0.005 % of measuring span/V DC
Load influence: < 0.01 % of measuring span/100 Ω
Long-term drift: ≤ 0.05 % of measuring span/year ≤ 0.18 % of measuring span/5 years
Supply voltage
Voltage: 7.5…48 V DC, protected against polarity reversal
7.5...30 V DC (Ex i), protected against polarity reversal
Temperature ranges
Ambient: -50...85 °C
-40...80 °C (SIL2/3)
Storage: -50...85
Tests and certificates
See data sheet.
Type series
PA2420

Documents

Name
Description
EN
DE
  • T4-073-2

    Data Sheet

  • ZER_113

    Certificate - ATEX

  • HE_170

    SIL Declaration

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