4 Description........................................................................................................................................... 31
4.1 SITRANS TH100.................................................................................................................. 31
4.1.1 Application range .............................................................................................................. 31
4.1.2 Structure ........................................................................................................................... 32
4.1.3 How TH100 works ............................................................................................................. 33
4.2 SITRANS TH320/TH420....................................................................................................... 34
4.2.1 Application ........................................................................................................................ 34
4.2.2 Structure ........................................................................................................................... 35
4.2.3 Meaning of the jumper positions........................................................................................ 36
4.2.4 Nameplate layout SITRANS TH............................................................................................ 36
4.2.5 LED function...................................................................................................................... 37
4.2.6 Test terminals .................................................................................................................... 38
4.2.7 How TH320 works ............................................................................................................. 39
4.2.8 How TH420 works ............................................................................................................. 40
4.2.9 HART communication ........................................................................................................ 41
4.2.9.1 HART communication with supply from voltage source....................................................... 41
4.2.9.2 HART communication with supply via isolating power supply.............................................. 42
4.3 SITRANS TR320/TR420........................................................................................................ 43
4.3.1 Application ........................................................................................................................ 43
4.3.2 Structure ........................................................................................................................... 44
4.3.3 Meaning of the jumper positions........................................................................................ 45
4.3.4 Nameplate layout SITRANS TR ............................................................................................ 46
4.3.5 LED function...................................................................................................................... 46
4.3.6 Test terminals .................................................................................................................... 47
4.3.7 How TR320 works.............................................................................................................. 48
4.3.8 How TR420 works.............................................................................................................. 49
4.3.9 HART communication ........................................................................................................ 50
4.3.9.1 HART communication with supply from voltage source....................................................... 50
4.3.9.2 HART communication with supply via isolating power supply.............................................. 51
4.4 SITRANS TF320/TF420........................................................................................................ 52
4.4.1 Application ........................................................................................................................ 52
4.4.2 Single chamber housing design.......................................................................................... 52
4.4.3 Nameplate layout SITRANS TF single chamber housing ....................................................... 53
4.4.4 Dual chamber housing design ............................................................................................ 54
4.4.5 Nameplate layout SITRANS TF dual chamber housing.......................................................... 55
4.4.6 How TF320 works.............................................................................................................. 56
4.4.7 How TF420 works.............................................................................................................. 57
4.5 USB modem and SIPROM T................................................................................................. 58
4.5.1 Applications....................................................................................................................... 58
4.5.2 Product features ................................................................................................................ 58
4.5.3 Meaning of LEDs on the USB modem.................................................................................. 59
5 Installing/mounting ............................................................................................................................. 61
5.1 Basic safety notes............................................................................................................... 61
5.1.1 ATEX/IECEx and others ....................................................................................................... 61
5.1.1.1 Safety information for installation in "Intrinsic safety "ia/ib"................................................. 61
5.1.1.2 Safety information for installation in "Non-sparking nA/ec" and "Intrinsic safety ic" .............. 62
5.1.2 FM/CSA.............................................................................................................................. 63
5.1.2.1 Safety information for installation in "Intrinsic safety "ia"..................................................... 63
Table of contents
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
4 Operating Instructions, 05/2020, A5E41864807-AB
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