F300 Megablocks are DIN-rail mounted, device couplers for Foundation™ fieldbus 

or Profibus PA networks. They allow connection of field devices to the segment 

trunk cable and provide short-circuit protection to the segment.

Megablocks minimize hand wiring and allow individual devices to be added to 

and removed from the segment without disrupting network communication.

Megablocks are available in four, eight, and twelve port versions. Multiple 

Megablocks are easily wired together to allow larger segments to be constructed.

Each F300 Megablock includes an F97 Terminator for installation in the trunk 

terminals, which is clearly marked with a large ‘T’ for easy identification by field 

personnel.

Individual surge-protector modules (FS32) can also be fitted to any of the 

Megablock fieldbus terminals to provide protection against induced surges and 

transients that can potentially destroy or degrade certain components inside the 

F300 Megablocks.