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SIWAREX WP321
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Integration in automation systems
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SIMATIC S7-300, S7-400, S7-1200 and S7-1500
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Via SIMATIC ET 200SP interface module
(PROFIBUS or PROFINET)
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Other manufacturers (with restrictions)
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Via SIMATIC ET 200SP interface module
(PROFIBUS or PROFINET)
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Communication interfaces
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- SIMATIC ET 200SP backplane bus
- RS485 (SIWATOOL, Siebert remote indicator)
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Optional remote weight indicator (via RS 485)
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Siebert S102
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Commissioning options for the scale
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- using SIWATOOL (PC software)
- using CPU / Touch Panel
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Measuring accuracy
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according to DIN 1319-1 of full-scale value at 20 °C ± 10 K
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0,05 %
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Internal resolution
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± 2 million parts
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Number of measurements/second (internal)
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100 / 120 Hz
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Digital filter
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Variable adjustable low-pass and average filter
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Typical applications
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- Non-automatic scales
- Force measurements
- Fill-level monitoring
- Belt tension monitors
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Weighing functions
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Weight values
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Limits
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Zeroing function
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Via command by controller or HMI
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Tare function
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Via command by controller or HMI
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External tare specification
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Via command by controller or HMI
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Calibration commands
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Via command by controller or HMI
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Load cells
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Strain gauges in 4-wire or 6-wire system
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Load cell excitation
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Supply voltage (value applies at sensor, cable-related voltage drops of up to 5 V are controlled)
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4.85 V DC ±2 %
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Permissible load resistance
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> 40 ?
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< 4100 ?
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With SIWAREX IS Ex interface
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> 50 ?
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< 4100 ?
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Load cell characteristic
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1 … 4 mV/V
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Permissible range of measuring signal
(at greatest set characteristic value)
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-21.3 ... +21.3 mV
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Max. distance of load cells
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1000 m (459.32 ft)
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Connection to load cells in Ex zone 1
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Optionally via SIWAREX IS Ex interface (compatibility of the load cells must be checked)
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Approvals
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- ATEX Zone 2 (manufacturer declaration)
- UL available soon
- FM available soon
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Max. cable length
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1000 m
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Transmission rate
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9 600 … 115 000 bit/s
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Auxiliary power supply
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Rated voltage
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24 V DC
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Max. power consumption
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typ. 0.1 A @ 24 V DC (0.2 A max.)
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Max. power consumption SIMATIC Bus
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30 mA
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IP degree of protection to DIN EN 60529; IEC 60529
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IP20
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Climatic requirements
Tmin (IND) ... Tmax (IND) (operating temperature)
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Vertical installation in SIMATIC S7 1)
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-25 ... +60 °C (-13 ... 140 °F)
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Horizontal installation in SIMATIC S7 1)
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-25 ... +60 °C (-13 ... 140 °F)
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EMC requirements according to
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IEC 61000-6-2, IEC 61000-6-4, OIML-R76-1
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Dimensions (width)
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15 mm (0.6 in.)
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