Siemens SITRANS T Series - HART Communication with Supply Via Isolating Power Supply

4.3.9.2 HART communication with supply via isolating power supply
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① Only intrinsically safe HART communicators or HART modems are allowed to be used with an intrinsically safe power
supply.
② HART communication via HART jacks of isolating power supply
③ Load ≥ 250 Ω only relevant if HART communication takes place via this branch. Otherwise, load of 0 to 650 Ω for ver‐
sions ① or ②
Figure 4-17 HART communication with supply via isolating power supply
Description
4.3 SITRANS TR320/TR420
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB 51