KROHNE OPTIFLUX 4300 C User manual

GR
©KROHNE 06/2005 7.30948.32.00
OPTIFLUX 4300 C
OPTIFLUX 5300 C
OPTIFLUX 4000 F
OPTIFLUX 5000 F
IFC 300 F
For use in hazardous areas (ATEX)
Subject to change without notice.
OPTIFLUX flowmeters are delivered ready
for operation!
Switch on and measure.
Supplement to the
QuickStart
Electromagnetic flowmeters
Variable area flowmeters
Mass flowmeters
Ultrasonic flowmeters
Vortex flowmeters
Flow controllers
Level measuring instruments
Pressure and temperature
Heat metering
Communications technology
Switches, counters, displays and recorders
Engineering systems & solutions

Hazardous area supplement to the QuickStart
OPTIFLUX
General advice on safety •Do not install, operate or maintain this device without reading, understanding and following the factory-supplied
instructions, otherwise injury or damage may result.
•Read these instructions carefully before starting installation and save them for future reference.
•Observe all warnings and instructions marked on the device.
•Use only mains supply with protective earthing connected.
•Do not use the device with covers removed under wet conditions.
•Follow the handling and lifting instructions to avoid damage.
•Install the device securely and stable.
•Install and connect cabling properly to prevent damage or harmful situations.
•If the product does not operate normally, refer to the service instructions or consult a qualified KROHNE service
engineer. There are no operator-serviceable parts inside the product.
Danger: Risk of electric shock!
Protective Earth (PE) conductor terminal!
These terms may appear in this manual or on the instrument:
Warning statement: Identify conditions or practice that could result in injury or loss of life.
or
Caution statement: Identify conditions or practice that could result in damage to the instrument or other property.
Disclaimer
•This document contains important information on the device. KROHNE attempts to be as accurate and up-to-date
as possible but assumes no responsibility for errors or omissions. Nor does KROHNE make any commitment to
update the information contained herein. This manual and all other documents are subject to change without prior
notice.
•KROHNE will not be liable for any damage of any kind by using this device, including, but not limited to direct,
indirect, incidental, punitive and consequential damages.
•This disclaimer does not apply in case KROHNE has acted on purpose or with gross negligence. In the event any
applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain
damages, you may, if such law applies to you, not be subject to some or all of the above disclaimer, exclusions or
limitations.
•Any device purchased from KROHNE is warranted in accordance with the relevant product documentation and our
Terms and Conditions of Sale.
•KROHNE reserves the right to alter the content of its documents, including this disclaimer in any way, at any time,
for any reason, without prior notification, and will not be liable in any way for possible consequences of such
changes.
Product liability
and warranty
•Responsibility for suitability and intended use of this device rests solely with the user. Improper installation and
operation of the device may lead to loss of warranty.
•In addition, the Terms and Conditions of Sale are applicable and are the basis for the purchase contract.
•If a device needs to be returned to KROHNE, please note the information given at the back of the installation and
operating instructions. KROHNE regrets that they cannot repair or check a device unless accompanied by the
completed form (see back pages of the installation and operating instructions).

Hazardous area supplement to the QuickStart
OPTIFLUX
This instrument has been developed and manufactured by:
KROHNE Altometer
Kerkeplaat 12
3313 LC Dordrecht
The Netherlands
For information, maintenance or service, please contact your nearest local KROHNE representative.
See www.krohne.com.
WARNING!
No changes may be made to the devices. Unauthorized changes might affect the explosion safety of the devices. Be
sure to follow these instructions!
IMPORTANT!
•The prescriptions and regulations as well as the electrical data described in the EC type examination certificate
must be obeyed.
•Beside the general regulations for low-voltage installations such as HD384, etc. the regulations laid down in the
standard for electrical installations in gas hazardous areas such as EN 60079-14 or dust hazardous areas such as
EN 50 281-1-2 must be complied with!
•Installation, commissioning, utilization and maintenance must be carried out only by personnel trained in explosion
safety!

Hazardous area supplement to the QuickStart
OPTIFLUX
Table of contents
1. Introduction..................................................................................................................................................................... 1
1.1 Description of system.................................................................................................................................................................. 1
1.2 OPTIFLUX 4300............................................................................................................................................................................. 1
1.3 OPTIFLUX 5300............................................................................................................................................................................. 2
1.4 IFC 300........................................................................................................................................................................................... 2
1.5 Data stickers ................................................................................................................................................................................. 3
2. Temperature limits.......................................................................................................................................................... 4
2.1 OPTIFLUX 4300............................................................................................................................................................................. 4
2.2 OPTIFLUX 5300............................................................................................................................................................................. 6
3. Connection diagrams ..................................................................................................................................................... 7
3.1 Equipotential bonding.................................................................................................................................................................. 8
3.2 Cable and conduit entries............................................................................................................................................................ 8
4. Electrical connection...................................................................................................................................................... 9
4.1 General .......................................................................................................................................................................................... 9
4.2 Non-EEx I signal I/O connections ............................................................................................................................................. 10
4.3 EEx i signal I/O connections ..................................................................................................................................................... 12
5. Service and maintenance............................................................................................................................................. 14
5.1 Maintenance................................................................................................................................................................................ 14
5.2 Replacement of mains fuse....................................................................................................................................................... 14
5.3 Returning the device for service or repair ............................................................................................................................... 14
Appendix 1 EC declaration of conformity ........................................................................................................................... 15

Hazardous area supplement to the QuickStart
1 OPTIFLUX
1. Introduction
1.1 Description of
system
The OPTIFLUX flowmeter system consists of a flow sensor and a flow converter.
The separate flowmeter is identified as:
•OPTIFLUX 4000 F flow sensor with IFC 300 F signal converter; see KEMA 04 ATEX 2125 X with KEMA 04 ATEX
2166
•OPTIFLUX 5000 F flow sensor with IFC 300 F signal converter; see KEMA 04 ATEX 2126 X with KEMA 04 ATEX
2166
The compact flowmeter in compact configuration is identified as:
•OPTIFLUX 4300 C (= OPTIFLUX 4000 + IFC 300 C); see KEMA 04 ATEX 2077 X
•OPTIFLUX 5300 C (= OPTIFLUX 5000 + IFC 300 C); see KEMA 04 ATEX 2127 X
1.2 OPTIFLUX 4300 OPTIFLUX 4000-EEx is certified as category 2 GD equipment for gas hazardous areas zone 1 and 2, gas group IIC,
temperature classes T6 (or T5) ... T3 and dust hazardous areas zone 21 and 22 surface temperature T85°C … 180°C.
The connection box contains terminals for the connection of the field current and electrode circuits:
Field current circuits, in type of protection "Increased safety" (EEx e), terminals 7,8 and 9: U < 40 V (switched DC voltage,
alternately +40 and -40 V), I = 125 mA (injected square wave current)
Electrode terminals, in type of protection "Intrinsic safety" (EEx ia), terminals 1, 2, 3, and 4: Ui = 20 V , Ii = 175 mA, Ci ≈0
nF, Li ≈0 mH.
Connection box, electrode terminals 1, 2, 20, 3, 30, 4 and 40: EEx ia (Intrinsic Safety)
Connection box, field coil terminals 7, 8 and 9: EEx e (Increased safety)
The cable gland for the electrode circuits is - as intrinsic safe circuit - marked with a blue O-ring.
The electrode circuits are always EEx ia.
OPTIFLUX 4300 C-EEx is certified as a group II, category 2 GD equipment, if fitted with an IFC 300-EEx converter unit
without EEx ia signal in/outputs or A group II, category 2 (1) GD equipment, if fitted with an IFC300-EEx converter unit with
EEx ia signal in/outputs.
It is therefore suitable for installation in gas hazardous areas zone 1 or 2 and dust hazardous areas zone 21 or zone 22.
Additionally, the EEx ia signal inputs/outputs of the IFC 300-EEx converter may run or originate from a Zone 0 Gas
hazardous area.
EEx marking OPTIFLUX 4000
DN range
10-20 II 2 GD EEx me ia IIC T6..T3 T85..150°C
25-150 II 2 GD EEx de ia IIC T6..T3 T85..180°C
200-300 II 2 GD EEx qe ia IIC T6..T3 T85..150°C
350-3000 II 2 GD EEx e ia IIC T6..T3 T85..160°C
Optional:
25-150 ((EEx qe coils) II 2 GD EEx qe ia IIC T5..T3 T85..180°C
200-300 (EEx e coils) II 2 GD EEx e ia IIC T6..T3 T85..160°C

Hazardous area supplement to the QuickStart
OPTIFLUX 2
EEx-marking OPTIFLUX 4300 C
Nominal diameter EEx e or EEx ia connection compartment EEx d connection compartment
10-20 EEx dme [ia] IIC T6..T3 EEx dme [ia] IIC T6..T3
25-150 EEx de [ia] IIC T6..T3 EEx d [ia] IIC T6..T3
200-300 EEx dqe [ia] IIC T6..T3 EEx dqe [ia] IIC T6..T3
350-3000 EEx de [ia] IIC T6..T3 EEx de [ia] IIC T6..T3
Optional:
25-150 EEx dqe [ia] IIC T5..T3 EEx dqe [ia] IIC T5..T3
200-300 EEx de [ia] IIC T6..T3 EEx de [ia] IIC T6..T3
1.3 OPTIFLUX 5300 OPTIFLUX 5000 and OPTIFLUX 5300 C are certified as category 2 GD equipment for gas hazardous areas classified as
zone 1 and 2, gas group IIC, temperature classes T6 … T3 and dust hazardous areas zone 21 and 22, surface temperature
T85°C .. 180°C.
The connection box of the flow sensor OPTIFLUX 5000 contains terminals for the connection of the field current and
electrode circuits:
Field current circuits, in type of protection "Increased safety" (EEx e), terminals 7,8 and 9: U < 40 V (switched DC voltage,
alternately +40 and -40 V), I = 125 mA (injected square wave current)
Electrode terminals, in type of protection "Intrinsic safety" (EEx ia), terminals 1, 2, 3, and 4: Ui = 20 V, Ii = 175 mA, Ci ≈0
nF, Li ≈0 mH.
Connection box, electrode terminals 1, 2, 3 and 4: EEx ia (Intrinsic Safety)
Connection box, field coil terminals 7, 8 and 9: EEx e (Increased safety)
The cable gland for the electrode circuits is - as intrinsic safe circuit - marked with a blue O-ring.
EEx marking OPTIFLUX 5000
Nominal diameter
2,5-15 II 2 GD EEx me ia IIC T6..T3 T85..180°C
25-100 II 2 GD EEx de ia IIC T6..T3 T85..180°C
In the coil housing (flow sensor) following types of protection are used: DN 2,5-15: EEx me, DN 25-100: EEx d
The electrode circuits in the coil housing are always in type of protection EEx ia.
EEx-marking OPTIFLUX 5300 C
Nominal diameter EEx e or EEx ia connection compartment EEx d connection compartment
2,5-15 EEx dme [ia] IIC T6...T3 EEx dme [ia] IIC T6...T3
25-100 EEx de [ia] IIC T6...T3 EEx d [ia] IIC T6...T3
1.4 IFC 300 EEx marking for all versions is II 2 GD EEx de [ia] IIC T6 T85°C for converter with non EEx ia signal inputs/outputs or II 2
(1) GD EEx de [ia] IIC T6 T85°C for converter with EEx ia signal inputs/outputs.
In the IFC 300 F-EEx flow converter following types of protection are used;
Field current circuit: in type of protection “Increased safety” (EEx e), terminals 7, 8 and 9: U < 40 V (switched DC voltage,
alternately +40 and -40 V), I = 125 mA (injected square wave current). The field current source is protected by 2 TR5 fuses,
rated value 160 mA. The maximum prospective short circuit current is restricted to 35 A.
Electrode terminals: in type of protection “Intrinsic safety” (EEx ia), terminals 1, 2, 20, 3, 30, 4 and 40: Uo= 14 V, Io= 70
mA, Po= 300 mW (linear), Co= 430 nF, Lo= 2 mH.
Converter housing, connection compartment: with power supply (terminals L, N / L+, L-) and I/O connections (terminals
A, A+, A-, B, B-, C, C-, D and D- ): EEx e (Increased safety). Optionally compact flowmeters, e.g. OPTIFLUX 4300 C and
OPTIFLUX 5300 C have EEx d (Flameproof Enclosure). For certain versions of converter IFC 300-EEx the terminals A, A+,
A-, B, B-, C, C-, D and D- are additionally EEx ia (Intrinsic safety). Consult the table with CG30 numbers for details.
Converter housing, electronics compartment: EEx d (Flameproof enclosure)
Connection box, electrode terminals 1, 2, 20, 3, 30, 4 and 40: EEx ia (Intrinsic safety)
Connection box, field current terminals 7, 8 and 9: EEX e (increased safety)

Hazardous area supplement to the QuickStart
3 OPTIFLUX
1.5 Data stickers The data sticker on the connection box of separate flow sensors typically contains following information:
1. Name and address of the manufacturer
2. Type designation of the flowmeter
3. CE sign with number(s) of notified body/bodies for notification
of Quality System and other EC directives (if required)
4. Specific sign for explosion protection
5. Symbols and code letters for explosion safety
5. Number of EC-type examination certificate
6. General EEx notes and warnings
7. Specific EEx notes and warnings
The data sticker on the IFC 300 converter typically contains following information:
1. Name and address of the manufacturer
2. Name of flowmeter, serial no, manufacturing date
3. Electrical data mains circuit
4. CE sign with identification number(s) of notified body/bodies
5. Specific sign for explosion protection
6. Symbols and code letters for explosion safety: group (II), categories
( 2 or 2(1) ), Gas/Dust (GD), EEx followed by the code letters for each
type of protection used, group (IIC) and temperature classes (normally
T6...T3)
7. Explosion safety warnings
8. Electrical data of the signal inputs/outputs

Hazardous area supplement to the QuickStart
OPTIFLUX 4
2. Temperature limits
2.1 OPTIFLUX 4300 •In general the OPTIFLUX 4000-EEx flow sensors are suitable for an ambient temperature range of -40°C ... +60°C. The
temperature range is often limited further by the liner type used (refer to Quick Start).
•The minimum process temperature is -40°C.
•The maximum process temperature Tp is dependent on the required temperature class T6/T5..T3, the diameter and the
maximum ambient temperature Ta. For dust hazardous areas the maximum surface temperature is equal to the process
temperature Tp with a minimum of 85°C.
OPTIFLUX 4000 DN 10 -20 (EEx me coils)
Max. process temperature Tp (in °C)
Temperature class
Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤60°C
T6 75 70 70
T5 95 90 75
T4 130 115 75
T3 150 115 75
OPTIFLUX 4000 DN 25 -150 (EEx d coils)
Temperature class Max. process temperature Tp (in °C)
Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤60°C
T6 70 70 70
T5 85 85 85
T4 120 120 120
T3 180 180 180
use heat resistant
cables for Tp above*
Not needed 155 105
OPTIFLUX 4000 DN 200 - 300 (EEx qe coils)
Temperature class Max. process temperature Tp (in °C)
Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤60°C
T6 75 70 70
T5 95 90 75
T4 130 115 75
T3 130 115 75
OPTIFLUX 4000 DN 350-3000 (EEx e coils)
Temperature class Max. process temperature (in °C)
Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤60°C
T6 60 60 60
T5 80 75 75
T4 115 115 115
T31160 150 140
use heat resistant
cables for Tp above*
Not needed 145 110
1For some versions the process temperature for T3 is restricted to 130°C. This version is identified by extra text on the data
sticker.

Hazardous area supplement to the QuickStart
5 OPTIFLUX
OPTIFLUX 4000 DN 25 -150 (EEx qe coils, optional)
Temperature class Max. process temperature Tp (in °C)
Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤60°C
T5 60 55 Not possible
T4 110 105 100
T3 180 180 180
use heat resistant
cables for Tp above*
Not needed 155 105
OPTIFLUX 4000 DN 200 - 300 (EEx e coils, optional)
Temperature class Max. process temperature Tp (in °C)
Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤60°C
T6 60 60 60
T5 80 75 75
T4 115 115 115
T3 160 150 140
use heat resistant
cables for Tp above*
Not needed 145 110
*The heat resistant cables must have a continuous operating temperature of at least 85°C.
•The OPTIFLUX 4300 C is suitable for ambient temperature range of -40°C … +60°C.
•The minimum process temperature for all DN sizes is -40°C. The process temperature limit (Tm) is determined by the
temperature class T6..T3 of the gas hazardous area of concern, the maximum ambient temperature (Ta), and the
nominal diameter.
•For dust hazardous areas, the maximum surface temperature is equal to the medium temperature with a minimum of
85°C.
•For ease of reference the flowmeter variants are simply denoted by main type of EEx-protection of the flow sensor,
e.g. EEx m for DN 10-20 range instead of the official EEx me.
OPTIFLUX 4300 C DN 10-20 (EEx m)
Temperature class (for gasses) Maximum medium temperature ( in °C)
Ta ≤40°C 40 < Ta ≤50°C 50 < Ta ≤60°C
T6 70 60 -
T5 95 85 60
T4 130 130 60
T3 150 150 60
OPTIFLUX 4300 C DN 25-150 (EEx d)
Temperature class (for gasses) Maximum medium temperature ( in °C)
Ta ≤40°C 40 < Ta ≤50°C 50 < Ta ≤60°C
T6 80 80 80
T5 95 95 80
T4 130 130 80
T3 150 150 80
OPTIFLUX 4300 C DN 25-150 (EEx q)
Temperature class (for gasses) Maximum medium temperature ( in °C)
Ta ≤40°C 40 < Ta ≤50°C 50 < Ta ≤60°C
T5 50 Not possible Not possible
T4 100 95 80
T3 150 150 80

Hazardous area supplement to the QuickStart
OPTIFLUX 6
OPTIFLUX 4300 C DN 200-300 (EEx q and EEx e) and DN 350-3000 (EEx e).
Temperature class (for gasses) Maximum medium temperature ( in °C)
Ta ≤40°C 40 < Ta ≤50°C 50 < Ta ≤60°C
T6 80 80 75
T5 95 95 80
T4 130 130 80
T31150 (130) 150 (130) 80
1For some versions the process temperature for T3 is restricted to 130°C. This version is identified by extra text on the
data sticker.
2.2 OPTIFLUX 5300 •The OPTIFLUX 5000 and 5300 C are suitable for ambient temperature range -20°C … +60°C (DN 2,5-15) or -40°C …
+60°C (DN 25-100).
•The process temperature is limited to -20°C for DN 2,5-15 and -40°C for DN 25-100.
•The maximum process temperature Tp is dependent on the required temperature class T6..T3 and the maximum
ambient temperature Ta.
OPTIFLUX 5000
Max. process temperature Tp (in °C)
Temperature class
for Gas
Maximum surface
temperature for Dust °C Ta ≤40°C 40°C < Ta ≤50°C 50°C< Ta ≤65°C
T6 85 65 65 60
T5 95 85 85 75
T4 130 125 125 115
T3 180 180 165 140
use heat resistant
cable for Tp above*
165 130 100
*The heat resistant cables must withstand a continuous operating temperature of at least 85°C.
OPTIFLUX 5300 C
For dust hazardous areas, the maximum surface temperature is equal to the medium temperature with a minimum of 85 °C.
Temperature class Maximum process (medium) temperature Tm (in °C)
Ta ≤40°C Ta ≤50°C Ta ≤60°C
T6 60 55 Not possible
T5 75 75 70
T4 115 115 75
T3 150 135 75

Hazardous area supplement to the QuickStart
7 OPTIFLUX
3. Connection diagrams
Connection diagrams with DS300 cable (double screen)
OPTIFLUX with 2 electrodes OPTIFLUX with 4 electrodes
Connection diagrams with BTS300 cable (triple screens)
OPTIFLUX with 2 electrodes OPTIFLUX with 4 electrodes
•Screens marked with * are mounted under the associated saddle earth clamps.
•Cables type A and E: DS300 electrode cables for 2 or 4 electrodes respectively, to EN 60079-14 clause 12.2 (Intrinsic
safety). Cable can be ordered from manufacturer.
•Cable type B and F: BTS300 electrode cables for 2 or 4 electrodes respectively, to EN 60079-14 clause 12.2 (Intrinsic
safety). Cable can be ordered from manufacturer.
•Cable C: field current cable to EN 60079-14 clause 9.3 and 11.3 (Increased safety).

Hazardous area supplement to the QuickStart
OPTIFLUX 8
3.1 Equipotential
bonding
•As the EEx ia electrode circuits of the flow sensors are effectively grounded through the conductive liquid in the
measuring tube, an equipotential bonding system must exist over the whole area in which the electrode circuits,
including their wiring, are installed, conform EN 60 079-14 clause 12.2.4.
•The flowmeters OPTIFLUX 4000-EEx and 5000-EEx, the electrode cable and the IFC 300 F signal converter must all
be included in the equipotential bonding system of the hazardous area. If a single separate conductor is used for
equipotential bonding, than this conductor must have a cross section of at least 4 mm2 copper.
•The separate equipotential bonding conductor between flowmeter and converter can be left out, if by other means (e.g.
over bonding conductors over the metal piping system) a high level of assurance that potential equalization exists
between flowmeter and converter is reached.
3.2 Cable and
conduit entries
The flowmeters are normally delivered with two EEx e certified cable glands. If these are replaced by other cable glands or
thread adapters, the replacements must also be EEx e (Increased safety) certified and suitable for the conditions of use and
correctly installed. For gas (G) hazardous areas the replacements must have a minimum IP degree to EN 60 529 of IP54.
For Dust (D) hazardous areas the minimum IP degree must be IP64.
Unused openings must be closed with suitable certified closing elements. With the use of conduit, a suitable certified
sealing device, e.g. a stopping box with setting compound must be provided immediately at the entrance to the flameproof
enclosure (converter housing).

Hazardous area supplement to the QuickStart
9 OPTIFLUX
4. Electrical connection
4.1 General
•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!
•Keep threads free of dirt. Threads must be well-greased (e.g. with Teflon grease) to make as
smooth as possible.
•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.
•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
•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.
•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.
•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.
•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.
•Unused openings shall be closed by suitable certified plugs
•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.
•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.

Hazardous area supplement to the QuickStart
OPTIFLUX 10
4.2 Non-EEx I signal I/O
connections
The following non-intrinsically safe signal inputs/outputs are available:
I/O PCB
input/output functions,
Un < 32 V DC, In < 100 mA
Um = 253 V
Basic I/O
Current Output active and passive, with HART
Status Output / Control Input
Status Output
Pulse / Status Output
Modular I/O Current Output, active or passive, with HART
Pulse / Status Output, active or passive, highC or Namur
Modular carrier with 1 or 2 I/O
modules
each module: 1 out of following 3 in/output functions:
•Current Output, active or passive
•Status / Pulse Output, active or passive, highC or Namur
•Control Input, active or passive, highC or Namur
Profibus DP I/O Profibus-DP, active
Fieldbus I/O
Profibus-PA or
Foundation Fieldbus
•The options separated with slash “/” are software selectable (can be changed by user)
•The options separated by the word “or” are hardware versions (must be ordered as such)
•All outputs are passive unless otherwise indicated
•HighC means High Current input/output, Namur means input/output to Namur recommendations

Hazardous area supplement to the QuickStart
11 OPTIFLUX
Overview of possible combinations, defined by their CG30 number
Characters XYZ Name I/O circuits Terminals A,
A-
Terminals B, B- Terminals C, C- Terminals D, D-
100 Basic I/O CO CO (a)
over A+
SO/CI SO PO/SO
488 to 4LL
588 to 5LL
688 to 6LL
788 to 6LL
888 to 88L
A88 to 6LL
B88 to 6LL
C88 to 6LL
Modular I/O or
Modular Carrier
with 1 or 2 I/O
Modules
Many combinations possible
D88 Fieldbus I/O
Profibus PA
n.c. n.c. PA PA
D8A to DLL Fieldbus I/O
Profibus PA with
Module Carrier with
1 or 2 I/O Modules
many combinations possible PA PA
E88 Fieldbus I/O
Foundation
Fieldbus
n.c. n.c. FF FF
E8A till ELL Fieldbus I/O
Foundation
Fieldbus with
Module Carrier with
1 or 2 I/O Modules
many
combinations
possible
FF FF
F00 FL0Profibus DP I/O n.c. DP(a) DP(a) DP(a)
F80 till FL0Profibus DP I/O
with 0 or 1 I/O
Module
many
combinations
possible
DP(a) DP(a) DP(a)
•shorts for in/output functions: CO= current output, PO=Pulse Output, SO= Status Output, CI= Control Input,
PA=Profibus PA, FF=Foundation Fieldbus, DP=Profibus DP
•all in/outputs are passive unless otherwise noted as active (a)
•n.c. = not connected.

Hazardous area supplement to the QuickStart
OPTIFLUX 12
4.3 EEx i signal I/O
connections
Following intrinsically safe signal I/Os are available:
I/O PCB I/O functions
Ex i I/O Current Output + HART
communication
Pulse / Status Output
Current Output, active
+ HART communication
EEx ia IIC
Ui =30V, Ii = 100 mA, Pi = 1,0 W
Ci = 10nF, Li = negligibly low
EEx ia IIC
Uo = 21 V, Io = 90 mA, Po = 0,5 W
linear characteristic
Co = 90 nF, Lo =2,0 mH
Co = 110 nF, Lo =0,5 mH
Ex i Option Current Output
Pulse / Status Output /
Control Input
Current Output, active
EEx ia IIC
Ui =30V, Ii = 100 mA, Pi = 1,0 W
Ci = 10nF, Li = negligibly low
EEx ia IIC
Uo = 21 V, Io = 90 mA, Po = 0,5 W
linear characteristic
Co = 90 nF, Lo = 2,0 mH
Co = 110 nF, Lo = 0,5 mH
Fieldbus I/O Profibus-PA
Foundation Fieldbus
EEx ia IIC
Ui = 24 V, Ii = 380 mA, Pi = 5,32 W
Ci , Li = negligibly low,
suitable for connection to an
intrinsically safe fieldbus in
accordance with the FISCO-model

Hazardous area supplement to the QuickStart
13 OPTIFLUX
Overview possible CG30 numbers with EEx ia in/outputs
Characters
XYZ
Name I/O
circuits
Terminals A, A- Terminals B, B- Terminals C, C- Terminals D, D-
200 Ex i I/O n.c. n.c. CO (a) PO/SO
300 n.c. n.c. CO PO/SO
210 Ex i I/O
with
Ex i Option
CO (a) PO/SO/CI CO (a) PO/SO
220 CO PO/SO/CI CO (a) PO/SO
310 CO (a) PO/SO/CI CO PO/SO
320 CO PO/SO/CI CO PO/SO
D00 Fieldbus I/O
Profibus PA
n.c. n.c PA PA
D10 Fieldbus I/O
Profibus PA
with
Ex i Option
CO (a) PO/SO/CI PA PA
D20 CO PO/SO/CI PA PA
E00 Fieldbus I/O
Foundation
Fieldbus
n.c. n.c FF FF
E10 Fieldbus I/O
Foundation
Fieldbus
with
Ex i Option
CO (a) PO/SO/CI FF FF
•Shorts for in/output functions: CO= current output, PO=Pulse Output, SO= Status Output, CI= Control Input,
PA=Profibus PA, FF=Foundation Fieldbus, DP=Profibus DP
•All in/outputs are passive unless otherwise noted as active (a)
•n.c. = not connected
•The I/O circuits named Ex i I/O, Ex i Option are always in type of protection Intrinsic safety (EEx ia). The I/O circuits
Fieldbus I/O Profibus PA and Fieldbus I/O Foundation Fieldbus can be in type of protection Intrinsic safety.
•A maximum of 4 intrinsically safe (EEx ia) in/outputs are possible. All intrinsically safe circuits are galvanically
insulated with respect to earth and to each other. To avoid summation of voltages and currents, the wiring of these
EEx ia circuits must be sufficiently separated, e.g. in line with the requirements of standard EN IEC 60079-14,
section 12.2.
•The EEx ia signal in/outputs may only be connected to other EEx ia or ib certified device (e.g. intrinsically safe
isolation amplifiers), even if such devices are installed in the non-hazardous area!
•Connection to a non-EEx i apparatus cancels the EEx ia properties of the flowmeter.
•Terminals L, N (or L+, L-) for mains connection are always non-intrinsically safe. To achieve the necessary spatial
separation to EN 50 020 between the non-EEx i and EEx i circuits the mains terminals are provided with a semi-
circular insulation cover with a "snap-in" lock. This cover has to be closed before powering up the converter.
•Note: For converters with an EEx e terminal compartment, it is allowed to open this compartment in an energized
state for short periods and to access the intrinsically safe terminals for possible checks provided the semi-circular
insulation cover over the non-intrinsically L, N (L+, L-) terminals is kept closed.

Hazardous area supplement to the QuickStart
OPTIFLUX 14
5. Service and maintenance
5.1 Maintenance The OPTIFLUX flowmeters are maintenance free with respect to the flowmetering properties. Within the scope of periodic
inspections required for electrical equipment installed in hazardous areas it is recommended to check the flameproof
converter housing and covers for signs of damage or corrosion.
For flowmeters sizes DN 25-100 with an EEx d flow sensor housing, this housing should also be inspected.
5.2 Replacement of
mains fuse
•After opening the window cover, pull the display-unit forward using the two metal levers left and right.
Slip the display-unit sideward. Loosen the two crosshead screws with which the electronic unit is
fixed. Now carefully slide the electronic unit forward. When the unit is almost completely removed
from the housing, disconnect the long rectangular (14-pole) blue connector at the back-end of the
unit. This connector is for the electrode- and coil circuits. Now the unit can be completely removed
from the housing.
•The mains fuse is situated in a fuse holder at the back-end of the electronic unit. Replacement types
must have a high breaking capacity to IEC 60 127. The rated nominal values must be ≤1.6 A for the
100..230 V AC version and ≤2.0 A for the 12..24 V DC version. Consult the Handbook for the correct
nominal value.
5.3 Returning the
device for service
or repair
This device has been carefully manufactured and tested. If installed and operated in accordance with these operating
instructions, it will rarely present any problems. Should you nevertheless need to return a device for inspection or repair,
please pay strict attention to the following points:
•Due to statutory regulations on environmental protection and safeguarding the health and safety of our personnel,
KROHNE may only handle, test and repair returned devices that have been in contact with products without risk to
personnel and environment.
•This means that KROHNE can only service this device if it is accompanied by the following certificate confirming that
the device is safe to handle.
If the device has been operated with toxic, caustic, flammable or water polluting liquids, you are kindly requested:
•To check and ensure, if necessary by rinsing or neutralizing, that all cavities in the device are free from dangerous
substances.
•To enclose a certificate with the device confirming that it is safe to handle and stating the product used.
•We cannot service your device unless accompanied by such a certificate.
The following specimen statement is available on the KROHNE website as a word file. Simply download and use the
tabulator key to go from one fill-out field to the next. Please attach the form to the returned device.
Specimen statement
Company:
Department:
Address:
Name:
Tel. No.
The enclosed device:
Type:
KROHNE Order No.
Has been operated with the following liquid:
Because the liquid is:
water-pollutant toxic caustic flammable (tick where applicable)
We have checked that the flowmeter and all cavities in the flowmeter are
free from such substances flushed* out and neutralized.
* delete where not applicable
We hereby confirm that there is no risk to man or environment through any residual liquid in or on the flowmeter or in any
of its cavities.
Date:
Signature: Company Stamp:

Hazardous area supplement to the QuickStart
15 OPTIFLUX
Appendix 1 EC declaration of conformity

Altometer
Addition
to the Installation and Operating instructions
Optiflux 4300 C-EEx
rev. 0 (20-07-2004)