The F30 is compatible with F304. F308 and F312 Megablock

types, typically providing up to 12 Ex ic spurs per fieldbus

segment. Up to two F30s and their associated Megablocks

may be connected to a single segment, to allow the fieldbus

trunk to be extended between junction boxes in the field.

The spurs are compatible with FISCO and Entity certified

fieldbus instruments. Where FISCO instruments are selected,

cable parameter calculations are not required.

To comply with intrinsic safety requirements, each fieldbus

segment must be powered by a 918x-x2 fieldbus power

supply, fitted with 9192-FP power modules.

Ex ic replaces the earlier Ex nL technique for energy-limited

fieldbus networks, and brings the technique into line with

formal intrinsic safety procedures.

A key benefit of the MTL Ex ic spur solution is that the

fieldbus power supply has a higher output voltage than

competing products, allowing longer trunk cable lengths and

more fieldbus instruments per segment. Requirements for

ensuring compatibility with major host control systems are

also simplified.

The F30 is designed for installation in the field enclosure

together with the Megablock wiring hub. A full range of

compatible stainless steel and glass reinforced polyester

(GRP) enclosures are available.