Siemens SIWAREX WT241 - Page 172

Technical specifications
12.1 Technical specifications
SIWAREX WT241
172 Manual, 05/2015, A5E36046748A
 with Ex-i inter-
face SIWAREX
IS
50 Ω
min. DMS output resistance
4 100 Ω
Temperature coefficient range
≤ ± 5 ppm/K v. E.
Temperature coefficient zero point
≤ ± 0.1 μV/K
Linearity error
≤ 0.002 %
Measured value filtering
Low pass
Electrical isolation
500 V AC
50 Hz / 60 Hz noise suppression CMRR
> 80 dB
Input resistance
 Signal cable
typ. 5*10
6
Ω
 Sensor cable
typ. 5*10
6
Ω
1)
Relative accuracy! (Absolute accuracy is only reached by calibration on-site with calibration stand-
ard)
2)
Accuracy for module replacement or theoretical calibration decisive
3)
Value valid at sensor; voltage drops on cables are compensated up to 5 V
Analog output
The set replacement value is output in case of a fault or SIMATIC CPU stop.
Table 12- 3 Technical specifications:
Error limit according to DIN 1319-1 of full-scale
value at 20 °C +10 K
0 ... 20 mA: ≤ 0.5 %
4 mA to 20 mA: ≤ 0.3 %
Refresh rate
≤ 100 ms
Resolution
14 bit
Measuring ranges
0 mA to 20 mA
4 mA to 20 mA
Max. output current
24 mA
Error signal (if configured (FW))
22 mA
Max. load
600 Ω
Temperature coefficient range
≤ ± 25 ppm/K v. E.
Temperature coefficient zero point
typ. ± 0.3 μA/K
Linearity error
≤ 0.05 %
Electrical isolation
500 V AC
Cable length
max. 100 m, twisted and shielded
Figure 12-1 Current ranges for signal level to Namur recommendation NE43