Weighing module SIWAREX MS


The SIWAREX MS is a compact weighing electronics for the system S7-200 from SIMATIC. The data for the actual weight can be accessed directly in the SIMATIC CPU without the need for any additional interfaces. SIWAREX MS is the optimum solution wherever strain gauge sensors, such as load cells, force sensors or torque measuring shafts, are used for measuring tasks.

The following are typical SIWAREX MS applications: Non-automatic weighing machines, Simple discontinuous weighing processes, Fill level monitoring of silos and bunkers, Measuring of crane and cable loads , Load measuring for industrial lifts and rolling mills, Weighing in potentially explosive areas (zone 2 or zone 1 using Ex interface SIWAREX IS or Pi) , Monitoring of belt tension, Force measuring, weighing hoppers, platform scales and crane scales.


 Integration in S7-200 automation systems

 CPU 222, CPU 224, CPU 224XP ,  

 Communication interfaces

 SIMATIC S7 Bus, RS 232, TTY

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

 0,05 %

 Internal resolution


 Number of measurements/second

 50 or 30

 Ex approvals and safety

 CE, ATEX 95, FM, cULUS Haz.


  • Standardized construction technology and universal communication due to the integration in SIMATIC S7-200

  • Application in the decentral system concept by connecting to PROFIBUS DP

  • Measuring weight or force with a resolution of 65,000 parts

  • Display can be connected

  • PExtensive diagnostic capabilities

  • Simple parameter definition with the SIWATOOL MS program

  • Theoretical adjustment without adjustment weights

  • Modules can be exchanged without readjusting the scale

  • Can be used for Ex-applications