KROHNE OPTIFLUX 4000 F, Руководство пользователя

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Hazardous area supplement to the QuickStart
9 OPTIFLUX
4. Electrical connection
4.1 General
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The covers of the housing electronics compartment and the housing itself are provided with a
"flameproof" thread. Compared to 'normal' thread, the f "flameproof" thread is a relatively tight fit
due to explosion proof requirements. Therefore, screw the cover on or off with care; never use
brute force!
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Keep threads free of dirt. Threads must be well-greased (e.g. with Teflon grease) to make as
smooth as possible.
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To open the covers first remove the hexagonal "retention" lock using a No. 3 Allen key. After
closing of the covers, the "retention lock" must be refitted.
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Allow the electronics to de-energize before opening the electronics compartment: T6: at least 35
min., T5: at least 10 min.
Connection compartment with terminal block
Terminal Function, electrical data
L, N
L+, L- Connection for mains, always non-EEx i
100..230 VAC, +10%/-15%, 22 VA
12..24 V DC, +30%/-25%, 12 W
Um = 253 V
A, A-,A+
B, B-
C, C-
D, D- Connection for signal I/Os (PELV circuits), non-EEx I or EEx I, are dependent on specific version of
the IFC300-EEx converter ordered.
Consult the table with CG30 numbers below for details
The exact I/O-configuration for circuits A, B, C and D is order-specific and can be determined by the CG30 number
shown on the converter - check sticker on the back of the IFC300 electronic unit.
The CG30 number contains 10 characters of which the last three (XYZ) determine the I/O configuration (I/O circuits):
CG30 * * * X Y Z
pos 1.. 4 5 6 7 8 9 10
determine I/O circuits
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Schematic overviews of the CG30 numbers can be found in paragraph 4.2 (non-EEx i signal I/O connections) and
4.3 (EEx i signal I/O connections). The overviews do not show all details. The exact connection diagram for a
specific IFC 300-EEx converter can be found on the sticker inside the cover of the connection compartment.
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For use in gas hazardous areas: The cable entry devices shall be in line with the type of protection chosen for the
terminal compartment, that is increased safety (EEx e) or flameproof enclosure (EEx d). They should be suitable for
the conditions of use and correctly installed.
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The flowmeter with an EEx e terminal compartment is supplied ex-factory with two EEx e certified cable glands and
one EEx e stopping plug.
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The flowmeter with an EEx d terminal compartment is supplied ex-factory one EEx d stopping plug and two
temporarily plugs. The two temporarily plugs – only for transport and storage – must be replaced by suitable EEx d
certified glands, plugs or conduit accessories before the flowmeter is taken into service.
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Unused openings shall be closed by suitable certified plugs
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The wiring of the compact flowmeter has to conform to the requirements specified in the relevant national or regional
standard for electrical installations in hazardous areas, e.g. EN 60079-14. From this standard section 9 (Wiring
systems) is valid for all types of protection. Section 10 (additional requirements for type of protection “d” –
Flameproof enclosures), section 11 (additional requirements for type of protection “e” – Increased safety) and
section 12 (additional requirements for type of protection “I” – Intrinsic safety) are valid for EEx e, EEx d or EEx I
connection compartments respectively.
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The compact flowmeter must always be included in the equipotential bonding system of the hazardous area. This
can be achieved internally – by means of the PE conductor of the mains system connected to the internal PE clamp
– or externally – by means of a separate equipotential bonding conductor connected to the external PE clamp under
the converter housing. A separate bonding conductor must have a cross sectional area of at least 4 mm2.