d and CNOOC, will produce 800,000 tons of naptha per year for
plastics manufacture. The installation is regarded as one of the worlds largest
F
OUNDATION
fieldbus
TM
networks to date, comprising over 30,000 fieldbus
instrument connections on more than 3,000 segments.
MTL-Relcom were chosen to supply fieldbus power conditioners and
Megablock wiring hubs. The FPS Series power conditioners were selected
because they provide the required isolation between power supply and
fieldbus segment, and their redundant operation has delivered the highest
levels of Shell-Nanhai/CNOOC-China/' class='doin' >availability on many prior fieldbus projects. To improve
integration and reduce control room cabinet Shell-Nanhai/CNOOC-China/' target='blank' class='doin' >requirements, the
power conditioners were mounted on F600A backplanes for
direct connection to redundant Yokogawa ALF111 fieldbus cards.
MTL-Relcom were selected as the supplier of key fieldbus
components because of their proven record with Shell and other
fieldbus users said Johan Veerman (Principal Instrument and
Process Control Engineer for CSPC).
Also, MTLs ability to
support the many engineering contractors throughout the world
and to offer on-site support from their offices in China is important
in this fast track project. As the most experienced fieldbus physical
layer supplier, MTL-Relcom has helped minimise the risk on this
prestige fieldbus project.
The segment design standardised on 8 fieldbus devices per
segment with a requirement for 2 spares, so the specially-
developed F118-PC 10-way Megablock was selected as the
wiring solution for use throughout the project. Its Zone 2
certification and SpurGuard short-circuit protection allows
connection to non-incendive, non-arcing and flameproof certified
field devices. To simplify wiring, spring clamp connections were
provided for all fieldbus connections.
A P P L I C A T I O N S T O R Y :
S H E L L N A N H A I / C N O O C , C H I N A
CONTROL ROOM
ZONE 2
(DIVISION 2)
F600A
INTEGRATED
POWER SUPPLY
SYSTEM
24Vdc
YOKOGAWA CONTROL SYSTEM WITH ALF-111 FIELDBUS CARDS
FIELD
Ex nA OR Ex d APPROVED FIELD DEVICES
F118 10-WAY
MEGABLOCK
WITH SPURGUARD
SHORT-CIRCUIT
PROTECTION
F600A 4-SEGMENT INTEGRATED
REDUNDANT POWER SUPPLY
SYSTEM FOR YOKOGAWA
ALF-111 FIELDBUS CARD
F600A fieldbus power supply system
supports 10 fieldbus devices per
segment at Shell, Nanhai, China