Foxboro P0916DV Fieldbus Extension Cable

Fieldbus Communication Modules (FCMs) are fibre optic communication extenders that allow

200 Series fieldbus modules to be remotely mounted near plant processes.

FCM2F2 (RH914YZ), FCM2F4 (RH917JA) and FCM2F10 (RH916TQ)

Three models are available with nominal maximum substrate-to-substrate fibre optic

cabling distances: up to 2 km (1.24 mi), 4 km (2.48 mi) and 10 km (6.21 mi) respectively.

FCMs are mounted in pairs on standard baseboards for redundancy.

Non-redundant configurations require only a single FCM.

Fibre optic cabling is unaffected by electrical noise (EMI, RFI and lightning)

and is a versatile and highly reliable means of extending signal communications.

It can be used in areas containing equipment such as rotating machinery, arc welders, etc.

It can also be installed in cable bridges containing high voltage power lines,or in outdoor

 areas exposed to lightning hazards.

or outdoor areas exposed to lightning hazards. Its electrical isolation features protect against

voltage differences and ground loops.

FCM Design

The FCM has a rugged extruded aluminium enclosure that provides physical protection for the circuitry.

Enclosures specifically designed for the installation of FBMs and FCMs provide varying degrees

of environmental protection for the FCM, up to harsh environments (Class G), in accordance with

ISA Standard S71.04.

The FCM can be removed/replaced from the base plate without power failure.

six light-emitting diodes (LEDs) on the front of the FCM.

Six light-emitting diodes (LEDs) on the front of the FCM are used to indicate the status of

network activity with the modular fieldbus and fibre-optic link, as well as the operational status of the FCM.

Figure 1 shows an example of a redundant configuration where the baseboards

(containing the FCM) are connected point-to-point via fibre optic cable.

The cabling configuration shows a single fibre optic segment connecting two substrates.

However, up to three fibre segments can be used to connect four baseboards (maximum).

The maximum fibre cabling distance between any two base stations is 10 km (using FCM2F10s (RH916TQ)).

The total fibre optic cabling distance (all cable segments) between base stations does not exceed 

20 km (10.42 miles).

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