OVERVIEW

Official designation: Siemens 7MH4950-1AA01 (SIWAREX U1, Single-Channel Weighing Module)

Role/Application: Compact single-channel weighing module for SIMATIC S7-300 and ET 200M systems, converting analog load cell signals from full bridges into weight values for real-time monitoring.

KEY SPECS SUMMARY

Power: Current consumption on backplane max 100 mA

Interfaces / Ports: RS232, TTY, Load Cell Interface

Indicators: Refer to the latest manufacturer manual.

Operating Temp: Ambient operating 0 to 60 degrees C

Platform / Compatibility: SIMATIC S7-300 and ET 200M

Limit: Max cable length 1000 m shielded

Lifecycle: Product cancellation October 1, 2025

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the load cell supply voltage provided by the SIWAREX U1 module?

A: The load cell supply voltage is 6 V DC, which differs from some older models.

Wiring & Installation:

Q: What type of connector is used for wiring the load cells and power supply?

A: The module requires a 20-pin standard front connector for wiring and installation.

Troubleshooting & Compatibility:

Q: What software is required for the calibration and service of the SIWAREX U1 module?

A: The SIWATOOL U software is required for configuration and calibration via the RS232 port.

Replacement & Upgrades:

Q: What is the typical purpose of the TTY interface available on the module?

A: The TTY interface is primarily used for connecting a compatible remote display unit.