Weighing module SIWAREX WP231

SIWAREX WP231 is a weighing module for SIMATIC S7-1200 and through this is programmable via the Totally Integrated Automation (TIA) Portal engineering platform. The ability to operate SIWAREX WP231 with or without SIMATIC PLCs offers you the flexibility you need. The Ethernet and RS485 interfaces with Modbus protocol enables you to integrate the weighing module into different control systems. SIWAREX WP231 offers four digital inputs and outputs and one analog output. The module also offers extensive diagnostic functions for commissioning and operation like trace of weight or monitoring of limit values.  Thanks to the automatic adjustment the application is ready-to-use in only a few minutes.

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  • Uniform structure and universal communication through the integration in S7-1200

  • Four digital inputs and outputs, one analog output, all inputs and outputs are controllable via the SIWAREX module or via SIMATIC S7-1200

  • Operation also possible without SIMATIC CPU

  • Easy commissioning via SIWATOOL or via HMI touch panel

  • Extensive diagnostic functions

  • Calibratable according type approval 2009/23/EC (NAWI)
  • Calibratable according NTEP Class III / III L
  • Flexible adjustment for different requirements

  • Theoretical adjustment without adjustment weights

  • Modules can be exchanged without readjusting the scale

  • Can be used for Ex-applications zone 2


Integration in automation systems
SIMATIC S7-1200 
Other systems via Modbus RTU or ModbusTCP/IP 
Communication interfaces
EU type approval as non-automatic weighing machine, trade class III
Internal resolution
up to 4 million parts
Internal/external updating rate

Typical applications: non-automatic scale according to OIML76, level monitoring of silos and bunkers, weighing in hoppers and platform scales, suitable in hazardous application (with SIWAREX Ex-Interface IS)

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