Siemens SIWAREX WP231 - Page 164

Technical data
13.1 Technical specifications
SIWAREX WP231
164 Manual, 07/2014, A5E31238908A-02
Analog load cell interface connection
Table 13- 3 Technical specifications: Analog load cell interface connection
Error limit to DIN1319-1 at 20 °C +10 K ≤ 0.05% v.E.
1)
Accuracy according to EN45501 / OIML
R76
• Class
III (and IV 1000d)
• Resolution
(d=e)
3000d
• Error percent-
age pi
0.4
• Step voltage
0.5 µV/e
Accuracy delivery state
2)
typ. 0.1% v.E.
Sampling rate 100 Hz
Input signal resolution ± 4 000 000
Measuring range ± 4 mV/V
Common mode voltage range 0 V to 5 V
DMS supply
3)
4.85 V DC +2/-3 %
Short-circuit and overload protection Yes
Connection 6-wire
Sensor voltage monitoring ≤ 0.3 V
Min. DMS input resistance
• without Ex-i
interface
SIWAREX IS
40 Ω
• 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. 60*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