Eaton MTL

MTL Instruments Group


Megablock range of Wiring Hubs

Please note that the FCS-MBx range of Megablocks and the A100 & 102 AS-i Megablocks have been terminated and the products listed in the Last Time Buy table below should only be purchased for maintenance purposes (spares and repairs).

A Megablock™ is a DIN-rail mounted passive hub designed for use in FOUNDATION™ fieldbus H1 and Profibus PA networks. The choice of rising cage clamp screw or spring clamp terminals simplifies installation and maintenance.

Megablocks minimize hand wiring and allow individual devices to be added to and removed from the segment without disrupting network communication. The SpurGuard™ option provides short circuit protection for the segment.

Hazardous area approvals permit installation in a variety of configurations in Zone 1 or 2 and Division 1 or 2. Within Zone 2 or Division 2, Megablocks may be installed as part of non-sparking (non-arcing) or energy-limited (non-incendive) circuits.

Additionally, the F300 Megablock is designed for live connection and disconnection of fieldbus spurs without a gas clearance certificate in Zone 2 and Division 2 hazardous areas when used with Ex ic and non-incendive certified field devices.

The F300 Megablock Trunk In/Out pluggable connector allows replacement of a Megablock without breaking the trunk connection to other devices on the fieldbus segment. The F97 terminator may be mounted in the Trunk-out connection to provide termination when the Megablock is located at the end of the fieldbus segment. It can be removed when the segment is extended, to ensure correct termination.

Pluggable surge protection components for the fieldbus trunk and individual spurs are available as an option reducing the installed cost of providing surge protection on fieldbus networks.

General Purpose
Zone 2 and Division 2
Zone 1 and Division 1
Intrinsically Safe
Intrinsically Safe Zone 1
EEx me
Zone 1
F200-IS F2xx-XE

1 - Classic product range
- Classic product range without SpurGuard™ short circuit protection

For a copy of the fieldbus SmartPlant Instrumentation (SPI) library ... <click here>

For the latest Fieldbus Segment Calculator tool that includes this product range <click here>

For product certificates <click here>

Product Code Description Downloads

intrinsically safe logo Symbol denotes that the equipment is suitable for use in hazardous area applications.
fsm logo Symbol denotes that the product has been assessed for functional safety applications

F2xx-IS   Intrinsically Safe Megablocks for Zone 1 applications Datasheet  Manual 
F2xx-XE   Megablocks for Zone/Div 1 applications Datasheet 
F300   Megablocks for Safe Area and Zone/Div 2 applications Datasheet  Drawings  Manual 
FCS-MBX   Classic Megablocks for Safe Area and Zone/Div 2 applications Datasheet