New Foxboro FCM2F2 Communication Module 2Mbps Fiber Optic Field Bus RH914YZ
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Fieldbus Communications Modules (FCMs) are fiber optic communications extenders that permit 200 Series Fieldbus Modules to be installed remotely and closely to the plant processes.
The three versions, FCM2F2 (RH914YZ), FCM2F4 (RH917JA), and FCM2F10 (RH916TQ), offer nominally maximum baseplate-to-baseplate fiber optic cabling distances: up to 2 km (1.24 mi), up to 4 km (2.48 mi), and up to 10 km (6.21 mi), respectively.
The FCMs are mounted on standard baseplates in pairs for redundancy. Non-redundant configurations
require only a single FCM.
Unaffected by electrical noise (EMI, RFI, and lightning), fiber optic cabling provides a versatile, highly reliable means of extending signal communications. It can be used in areas containing rotating machinery, arc welders, and so forth, and can be installed in cable trays containing high voltage power lines, or in outdoor areas exposed to lightning hazards. Its electrical isolation characteristics provide protection from voltage differentials and ground loops.