Technical data
12.1 Technical specifications
SIWAREX WP321
108 Manual, 07/2014, A5E33715669A-02
Analog load cell interface connection
Error limit to DIN1319-1
at 20 °C +10 K
≤ 0.05% v.E.
1)
Accuracy according to OIML R76 (no approval for
measurements requiring verification)
• Class
III and IV
• Resolution (d=e)
3000d
• Error percentage pi
0.4
• Step voltage
0.5 µV/e
Accuracy delivery state
2)
typ. 0.1% v.E.
Sampling rate 100 Hz/120 Hz (depending on parameterization)
Input signal resolution ± 2 000 000 (for cells with 4 mV/V)
Measuring range ± 4 mV/V
Common mode voltage range 0.25 to 4.75 V
DMS supply
3)
4.85 V DC ±2 %
Short-circuit and overload protection Yes
Connection 6-wire
Sensor voltage monitoring ≤ 4 V
min. DMS input resistance
• without Ex-i interface SIWAREX IS
40 Ω
• with Ex-i interface 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 ≤ 0.01 %
Measured value filtering Low pass
Electrical isolation 500 V AC
50 Hz / 60 Hz noise suppression CMRR > 80 dB
Input resistance
• Signal cable
typ. 4*10
6
Ω
• Sensor cable
typ. 2*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
Maximum cable length 500 m with SIWAREX cable, → Accessories
(Page 115).
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