USA - SIWAREX U weighing module

Weighing Module

The SIWAREX U is a versatile weighing module for all simple weighing and force measuring tasks. It is used either centrally in a SIMATIC S7-300 or decentrally via PROFIBUS-DP link to an S7-400, SIMATIC S5 or systems of other manufacturers. The SIWAREX U combined with standard SIMATIC components offers an optimum hardware and software solution. A 1 or 2-channel SIWAREX U used with the SIMATIC CPU 312 C, is a very cost effective, freely programmable weighing system with a total of ten digital inputs and six digital outputs.

SIWAREX U Catalog Specifications

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  • Uniform design technology and consistent communication in SIMATIC

  • Measurement of weight or force with a high resolution of 65000 parts and an accuracy of 0.05%

  • Space saving through use of two-channel version for two scales

  • Direct connection of a remote display to the TTY interface

  • Theoretical adjustment without adjustment weights

  • Replacement of module without renewed adjustment of scale

  • Simple parameterizing with SIWATOOL

  • Intrinsically-safe load cell supply for the hazardous area zones 1, 2 (optional)

  • Can be used for Ex applications

Typical applications: levels in storage silos and containers, monitoring crane loads, measuring conveyor belt loads, overload protection for industrial lifts or mill trains


In general, anywhere where weights need to be recorded and transferred to an automation system for processing as quickly as possible, with no bias and without the need for an additional interface


 Integration in automation systems S7-400, PCS7, C7,  IM151-7 CPU
Via ET 200M; Direct integration 
 in S7-300
 Communication interfaces
 SIMATIC S7 (P-Bus), RS 232, 
Error limit
 0.05 %
 Internal resolution
Number of measurements/second
 ATEX 95, FM, CULUS Haz. Loc.

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Whether you need to measure pressure, temperature, flow, level or weighing, Siemens has best-in-class instruments to suit the unique needs of your plant or application - along with a global network of technical support available 24 hours a day, 7 days a week. Our high-performance and cost-efficient range of industrial solutions also includes devices for valve positioning, process protection, recording, controlling, communication and more.

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