Available with a PCI Express interface that enables the transmission of larger quantities of data, the FC3121 and FC3122 PROFIBUS PC fieldbus cards can optionally be equipped with the FC600x NOVRAM cards for the fail-safe storage of data. Up to 30 kB of PROFIBUS input and output data can be transmitted per channel. The new Beckhoff fieldbus cards can be used as single-channel (FC3131) or dual-channel (FC3122) PROFIBUS masters or slaves. In dual-channel mode, the two channels act independently of each other. The secured data can be transmitted to another fieldbus card with this memory module, thus ensuring high availability of the machine or plant controller. The plug-in type NOVRAM cards, with memory capacities of 128, 256 or 512 kB, can be retrofitted.