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The AC 900F has four built-in Ethernet and two serial ports that support both Modbus TCP and IEC 60870-5-104 remote control protocols on Ethernet. A Profibus master module includes line redundancy, enabling high availability without risk of failure. A single AC-900F controller supports up to 1500 I/O and up to ten direct I/O modules. The AC 900F supports the import of updates and configurations as well as backing up the project configuration via an SD card. In the 2013 Freelance version, the engineering tool has also been further developed for an optimized planning process. This software can be used to configure the system. This software is compatible with all previous versions of the Freelance hardware.
