Crouse-Hinds series MTL Megablock™ is a DIN-rail mounted passive hub
designed for use in FOUNDATION™ fieldbus H1 and Profibus PA networks.
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.
• F2xx-IS models: Intrinsically Safe Megablocks for Zone 1 applications
• F2xx-XE models: Megablocks for Zone/Div 1 applications
• F300 models: Megablocks for Safe Area and Zone/Div 2 applications
Certifications and compliances
• For a complete listing of certification and approvals across our MTL Megablock range,
download the product datasheets in the resources section of this family page.
Design features
• A green power LED on each unit indicates whether at least 9V dc is present.
• 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
• Choice of rising cage-clamp screw terminal or spring clamp type connections simplifies
commissioning and maintenance
• Available with built-in SpurGuard™ protectors that prevent a short circuit in any of the
individual transmitters or spur
cable runs from bringing the entire fieldbus segment down
• A red LED near each spur connection indicates that a spur is shorted and is in
“over-current” mode
Standard materials
• Housing: Polycarbonate
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