4.2.9.2
HART communication with supply via isolating power supply
6,75$167+7+
6,75$167575
+$57ILHOGFRPPXQLFDWRU
+$57PRGHP
56RU86%
)HHGVSOLWWHU
IRUH[DPSOH6,75$16,
+$57VRFNHWV
8
DX[
5
ORDG
!വവ
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 4-10
HART communication with supply via isolating power supply
Description
4.2 SITRANS TH320/TH420
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
42
Operating Instructions, 05/2020, A5E41864807-AB