Siemens SIWAREX WP251 Manual page 204

Technical specifications
13.1 Technical specifications
Maximum cable length between junction box and WP251
Common mode voltage range
DMS supply
Short-circuit and overload protection
Connection
Sensor voltage monitoring
Min. DMS input resistance
min. DMS output resistance
Temperature coefficient range
Temperature coefficient zero point
Linearity error
Measured value filtering
Electrical isolation
50 Hz / 60 Hz noise suppression CMRR
Input resistance
Relative accuracy! (Absolute accuracy is only reached by calibration on-site with calibration stand-
1)
ard)
Accuracy for module replacement or theoretical calibration decisive
2)
Value valid at sensor; voltage drops on cables are compensated up to 5 V
3)
Analog output
The set replacement value is output in case of a fault or SIMATIC CPU stop.
Table 13- 4
Error limit according to DIN 1319-1 of full-scale
value at 20 °C +10 K
Refresh rate
Resolution
Measuring ranges
Max. output current
Error signal (if configured (FW))
Max. load
Temperature coefficient range
Temperature coefficient zero point
Linearity error
204
3)
Technical specifications:
1000 m (3280 ft)
0 V to 5 V
4.85 V DC +2/-3 %
Yes
6-wire
≤ 0.3 V
40 Ω
without Ex-i
•
interface
SIWAREX IS
50 Ω
with Ex-i inter-
•
face SIWAREX
IS
4 100 Ω
≤ ± 5 ppm/K v. E.
≤ ± 0.1 μV/K
≤ 0.002%
Low pass
500 V AC
> 80 dB
typ. 5*10
Signal cable
•
typ. 60*10
Sensor cable
•
0 ... 20 mA: ≤ 0.5%
4 ... 20 mA: ≤ 0.3%
≤ 100 ms
14 bit
0 mA to 20 mA
4 mA to 20 mA
24 mA
22 mA
600 Ω
≤ ± 25 ppm/K v. E.
typ. ± 0.3 μA/K
≤ 0.05%
Ω
6
Ω
6
SIWAREX WP251
Manual, 12/2015, A5E37203357A