Technical information

12
Technical Data of the IS inputs
and outputs
HART input loop
Spot RTD input (option, s. pos. 40 of the product structure)
IS Analogue 4...20 mA input (option, s. pos. 70 of the product structure)
Discrete inputs (option, s. pos. 70 of the product structure)
Source voltage U = 25 V - I
Load
x 333 Ω (typically)
total I
max
Start-up currents of all connected HART devices may not exceed a total of 27 mA
connectable sensors depending on current consumption (including start-up current)
Measuring range 10 ... 600 Ω
Excitation current typ. 400 µA, max. 2000 µA
Type of Sensor Nominal value Temp
min
Temp
max
Accuracy
1)
1) Accuracy of converter, may be influenced by element accuracy
Pt100 (385) IEC751
Pt100 (389)
Pt100 (392) IPTS-68
100 Ω @ 0 °C (≈ 32 °F) -200 °C (≈ -330 °F) +600 °C (≈ +1110 °F) ±0.1 °C (≈ ± 0.2 °F)
Cu90 (4274)
100 Ω @ 25 °C (≈ 77 °F)
[90 Ω @ 0 °C (≈ 32 °F)]
-100 °C (≈ -150 °F) +250 °C (≈ +480 °F) ±0.1 °C (≈ ± 0.2 °F)
Ni120 (672) 120 Ω @ 0 °C (≈ 32 °F) -60 °C (≈ -75 °F) +180 °C (≈ +350 °F) ±0.1 °C (≈ ± 0.2 °F)
Ni100 (618) DIN
43760
100 Ω @ 0 °C (≈ 32 °F) -60 °C (≈ -75 °F) +180 °C (≈ +350 °F) ±0.1 °C (≈ ± 0.2 °F)
Source voltage U = 25 V - I
Load
x 333 Ω (typically)
Internal load (to ground) 100 Ω
Measuring range 0 ... 26 mA
Accuracy ±15 µA (after linearisation and calibration)
Usage Source for Discrete Inputs / Source for 4 ... 20 mA loop device
Active voltage ("closed circuit") min. 9 V (default)
In-active voltage ("open circuit") max. 7 V (default)
Active high current 4 mA
Switching hysteresis 2 V