Technical data
12
12.1 Technical data
24 V power supply
Note
A protective extra-low voltage (to EN 60204‑1) is to be ensured by system power supply.
Rated voltage 24 V DC
Static low / high limits 19.2 V DC / 28.8 V DC
Dynamic low / high limits 18.5 V DC / 30.2 V DC
Non-periodic overvoltages 35 V DC for 500 ms with a recovery time of 50 s
Maximum current consumption 100 mA with 24 V DC
Typical power consumption of the module 2 W
Power supply from SIMATIC S7 backplane bus
Power consumption from SIMATIC S7 backplane
bus
Typically 20 mA
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 100/120/600 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
SIWAREX WP321
Operating Instructions, 08/2019, A5E33715669A-AD 115
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