Application Scenarios:

In a municipal water treatment plant, managing the chemical dosing and filtration processes reliably is critical to ensure continuous potable water supply. The plant previously used a mix of standalone PLCs, which led to integration issues and difficulty in centralized monitoring. By deploying the ABB PM901F​ as the core controller in a Freelance DCS architecture, the plant achieved seamless integration of its coagulation, flocculation, and disinfection stages. The PM901F‘s built-in Ethernet ports allowed direct connection to the plant’s SCADA system via Modbus TCP, eliminating the need for additional gateways. During a critical power fluctuation event, the module’s battery-backed RAM preserved all process data and controller configuration, enabling a swift and accurate restart without manual intervention, thus preventing a potential 6-hour production halt.

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