SIWAREX WP321

Integration in automation systems

SIMATIC S7-300, S7-400, S7-1200 and S7-1500

Via SIMATIC ET 200SP interface module
(PROFIBUS or PROFINET)

Other manufacturers (with restrictions)

Via SIMATIC ET 200SP interface module
(PROFIBUS or PROFINET)

Communication interfaces

• SIMATIC ET 200SP backplane bus
• RS485 (SIWATOOL, Siebert remote indicator)

Optional remote weight indicator (via RS 485)

Siebert S102

Commissioning options for the scale

• using SIWATOOL (PC software)
• using CPU / Touch Panel

Measuring accuracy

according to DIN 1319-1 of full-scale value at 20 °C ± 10 K

0,05 %

Internal resolution

± 2 million parts

Number of measurements/second (internal)

100 / 120 Hz

Digital filter

Variable adjustable low-pass and average filter

Typical applications

• Non-automatic scales
• Force measurements
• Fill-level monitoring
• Belt tension monitors

Weighing functions

Weight values

• Gross
• Net
• Tare

Limits

• Min/max
• Empty

Zeroing function

Via command by controller or HMI

Tare function

Via command by controller or HMI

External tare specification

Via command by controller or HMI

Calibration commands

Via command by controller or HMI

Load cells

Strain gauges in 4-wire or 6-wire system

Load cell excitation

Supply voltage (value applies at sensor, cable-related voltage drops of up to 5 V are controlled)

4.85 V DC ±2 %

Permissible load resistance

• R_Lmin

> 40 ?

• R_Lmax

< 4100 ?

With SIWAREX IS Ex interface

• R_Lmin

> 50 ?

• R_Lmax

< 4100 ?

Load cell characteristic

1 … 4 mV/V

Permissible range of measuring signal
(at greatest set characteristic value)

-21.3 ... +21.3 mV

Max. distance of load cells

1000 m (459.32 ft)

Connection to load cells in Ex zone 1

Optionally via SIWAREX IS Ex interface (compatibility of the load cells must be checked)

Approvals

• ATEX Zone 2 (manufacturer declaration)
• UL available soon
• FM available soon

Max. cable length

1000 m

Transmission rate

9 600 … 115 000 bit/s

Auxiliary power supply

Rated voltage

24 V DC

Max. power consumption

typ. 0.1 A @ 24 V DC (0.2 A max.)

Max. power consumption SIMATIC Bus

30 mA

IP degree of protection to DIN EN 60529; IEC 60529

IP20

Climatic requirements
T_{min (IND) ...} T_{max (IND)} (operating temperature)

Vertical installation in SIMATIC S7 ¹⁾

-25 ... +60 °C (-13 ... 140 °F)

Horizontal installation in SIMATIC S7 ¹⁾

-25 ... +60 °C (-13 ... 140 °F)

EMC requirements according to

IEC 61000-6-2, IEC 61000-6-4, OIML-R76-1

Dimensions (width)

15 mm (0.6 in.)