YOKOGAWA Total Insight series Quick Reference Instruction Manual page 40

Quick Reference Instruction Manual
Wiring
Passive current
output lout
Nominal output current
Maximum output current range
External power supply
Load resistance for secure HART communi-
cation
Load resistance at current output
Additive maximum deviation
Additive output deviation for deviation from
20 °C ambient temperature
Fig. 24: 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 con-
nected voltage source. Higher load resistances are allowed with higher power supply val-
ues. The usable zone for passive power output operation is indicated by the hatched
area.
ROTAMASS
Fig. 25: Passive current output connection lout
40 / 54
911
U - 10.5 V
R =
0.0236 A
0
10.5
U in V
Load resistance
External power supply voltage
Iout+
Iout-
IM01U10A00-00EN-R, 2nd edition, 2017-08-29
Value
4 – 20 mA
2.4 – 21.6 mA
10.5 – 32 V
DC
230 – 600 Ω
≤ 911 Ω
8 µA
0.8 µA/ °C
32
U
R
Transmitter