Fieldbus Megablocks

Megablocks are DIN rail mounted passive hubs for Foundation Fieldbus networks. Also called ‘bricks’ or ‘couplers’, Megablocks connect several field devices to the network trunk cable and optionally 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. A green power LED on each unit indicates whether at least 9V of DC power is present.

Megablocks are available in two, four, eight, ten, and twelve drop versions. Multiple Megablocks are easily wired to one another to allow larger segments to be constructed.

The Megablock Terminator is easily wired to any Megablock to provide one of the two terminators required on each segment. The Megablock Terminator is clearly marked with a large "T" for easy identification by field personnel.

The Megablocks and a Megablock Terminator are ideal for a star or chickenfoot topology where several transmitters are connected at a single field junction box, as shown above.

See our Megablock Selection Guide to help pick the right Megablock for your application.

For an overview of Megablock features, please see the Megablock Product Overview.

Accessories for the Megablocks including DIN Rail, DIN Rail End Stops, and Megablock Trunk Covers are shown on our Accessories page.

The DXF links in the Drawings column below are mechanical drawings of the product that may be included in your AutoCAD® or equivalent CAD drawings. The remaining table entries are PDF files that may be viewed with
Adobe’s Acrobat Reader.