Siemens SITRANS FC720 Operating Instructions Manual page 115

Transmitter
Fig. 71: Maximum load resistance as a function of an external power supply voltage
R
U
The diagram shows the maximum load resistance R as a function of voltage U of the
connected voltage source. Higher load resistances are allowed with higher power supply
values. The usable zone for passive power output operation is indicated by the hatched
area.
SITRANS FC
Fig. 72: Passive current output connection lout
911
U - 10.5 V
R =
0.0236 A
0
10.5
U in V
Load resistance
External power supply voltage
Iout+
Iout-
32
U
R
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FC7x0
Wiring
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