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SIWAREX Dosing, Filling, Bagging & Checking Scales

SIWAREX WP351

SIWAREX WP351 is the right choice for many demanding weighing applications, such as producing accurate mixtures, ensuring precise filling, bagging, checking, totalizing and dosing. SIWAREX WP351 can be used in automatic as well as in non-automatic weighing applications.

The right choice for many demanding weighing applications.

Due to the intelligent firmware the weighing process is controlled autonomously directly from the module. In addition, the high-speed sampling rate and processing time of 1000 Hz guarantee optimal performance and repeatability. 

The connection of standard load cells according to the strain gauge principle avoids any manufacturer dependence. As a result, a large range of compatible, globally recognized and field-proven sensors can be used.

The high-performance SIWAREX WP351 is packed into an ultra-compact design. With a width of only 20 mm and a height of 65 mm, it is one of the smallest weighing electronics worldwide.

Because it can be integrated seamlessly into the ET 200SP system, it can be directly connected to SIMATIC PLC systems such as S7-300, -400, -1200 and -1500, making it a smart alternative to “black-box” weighing terminals.

The ET 200SP interface module IM155-6MF HF enables an easy connection to Ethernet IP- or Modbus TCP-based automation systems.

Key Features

  • Ultra-compact: 20 mm width, 65 mm height
  • Fast: reaction time of digital outputs < 1 ms
  • Highly accurate: resolution +/– 20,000,000 parts, up to 3 x 6000d multi-range/multi-interval scale; 0.5 µV/d
  • User-friendly due to webserver for service and commissioning
  • Seamless integration in different automation systems 
  • Various communication interfaces ex-works
  • “Ready-to-use” HMI interface and function block
 

Technical Specifications

SIWAREX WP351
Integration in automation systems
SIMATIC S7-300, S7-400, S7-1200 and S7-1500;
Ethernet IP/Modbus TCP based systems via ET 200SP IM155-6MF HF
Communication interfaces
3x DI (24V DC); 3x DQ (24V DC);
1x RJ45; 1x RS485; 1x CI
Internal resolution
+/– 20,000,000 parts
Sample rate
1000 Hz
Design

The SIWAREX WP351 is a technology module of the SIMATIC ET 200SP distributed I/O system.

Installation is on a type U0 BaseUnit. The load cells, serial RS 485 interface and digital inputs/outputs are wired directly on the BaseUnit with user-friendly push-in terminals. This makes is quick and easy to replace modules without any wiring effort.

The web server is addressed via an Ethernet interface in the module. Should more interfaces and I/O be required, they can be added with the ET 200SP system components.

 

Application

SIWAREX WP351 offers a compact and extremely versatile solution for automatic and non automatic scale applications with high requirements for accuracy and performance.

Typical areas of application include:

  • Silo, hopper and platform scales, requiring official calibration/not requiring official calibration
  • Totalising automatic weighing instruments, requiring official calibration/not requiring official calibration
  • Filling scales, requiring official calibration/not requiring official calibration
  • Static checking scales, requiring official calibration/not requiring official calibration
  • Automatic dynamic checking scales, not requiring official calibration
  • Recipe-controlled batch/mixing scales

 

The SIWAREX WP351 Advantage

  • Low space requirements with only 20 mm module width
  • Seamless integration into SIMATIC ET 200SP
  • 1 000 Hz sampling rate und processing time
  • Installation of legal-for-trade multi-interval/multi-range scales with up to 3 × 6 000 d
  • Operation with SIMATIC S7-300, S7-400, S7-1200 and S7-1500 controllers
  • Operation in Ethernet IP or Modbus TCP-based systems using ET 200SP multi-field bus IM
  • Three digital inputs and outputs each ex works
  • High degree of scalability in connection with all available SIMATIC standard components
  • Open SIWAREX concept – all settings and parameters accessible, no encapsulated black box in the field
  • Unrestricted access to all scale parameters and functions from the SIMATIC S7 Controller / HMI
  • Internal, legal-for-trade protocol memory for up to 1 000 000 entries
  • Commissioning and maintenance from HMI or module-internal web server
  • Legal-for-trade main display integrated in the SIMATIC HMI

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