KROHNE OPTISWIRL 4070 Wiring diagram

Vortex flowmeter
Equipment category II3G
OPTISWIRL 4070
OPTISWIRL 4070OPTISWIRL 4070
OPTISWIRL 4070 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 05/2016 - 4001268803 - AD OPTISWIRL 4070C Ex-II3G R04 en

CONTENTS
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OPTISWIRL 4070
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 EU conformity ................................................................................................................... 3
1.3 Safety instructions............................................................................................................ 3
2 Device description 4
2.1 Device description ............................................................................................................ 4
2.2 Description code............................................................................................................... 4
2.3 Marking............................................................................................................................. 5
2.4 Flammable products ........................................................................................................ 7
2.5 Equipment category .........................................................................................................7
2.6 Protection types................................................................................................................ 8
2.6.1 Protection types for the compact version .............................................................................. 8
2.6.2 Protection types for the remote version................................................................................. 8
2.7 Ambient temperature / temperature classes.................................................................. 9
2.8 Electrical data................................................................................................................. 12
3 Installation 13
3.1 Special conditions........................................................................................................... 13
3.2 Installation...................................................................................................................... 13
4 Electrical connections 14
4.1 General notes ................................................................................................................. 14
4.2 Power supply .................................................................................................................. 14
4.3 Inputs / outputs .............................................................................................................. 14
4.4 Grounding and equipotential bonding............................................................................ 15
4.5 Sensor circuits (remote version only)............................................................................ 16
5 Operation 17
5.1 Start-up........................................................................................................................... 17
5.2 Operation ........................................................................................................................ 17
5.3 Electrostatic charge .......................................................................................................17
6 Service 18
6.1 Maintenance ................................................................................................................... 18
6.2 Dismantling .................................................................................................................... 18

SAFETY INSTRUCTIONS 1
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1.1 General notes
These additional Ex instructions apply to explosion-protected versions of the vortex flowmeters
with the marking II 3 G. They complement the standard documentation for non-explosion
protected versions.
The information given in these Instructions contains only the data relevant to Category 3
explosion protection. The technical details given in the Installation and Operation Instructions for
the non-explosion protected versions apply unchanged unless excluded or superseded by these
Instructions.
1.2 EU conformity
The manufacturer declares with the EU Declaration of Conformity on his own responsibility
conformity with the protection goals of directive 2014/34/EU for use in hazardous areas with gas
and dust.
The assessment was made according to Directive 2014/34/EU, Annex VIII (module "Internal
control of production") and is registered company-internal under KMT-TDZ-A091X. This
registration number is also provided on the nameplate.
1.3 Safety instructions
If these instructions are not followed, there is a risk of explosion.
Assembly, installation, start-up and maintenance may only be performed by personnel trained in
explosion protection!
CAUTION!
Operating conditions and place of installation may require compliance with additional standards,
directives or laws. The responsibility for compliance rests solely with the operator or his agent.

2 DEVICE DESCRIPTION
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2.1 Device description
Vortex flowmeters measure and display the volume flow of flammable and non-flammable gases
and liquids. The display unit contains a 4...20 mA signal output with optional HART
®
communication and a separate pulse/status output.
2.2 Description code
The safety description code * consists of the following elements:
* positions which are not needed are omitted (no blank positions)
The remote version consisting of the OPTISWIRL 4000 flow sensor and the VFC 070 F signal
converter is called the OPTISWIRL 4070 F.
Compact device
1 Product designation
2 Type series
3 Compact measuring device
4 Marking without influence on the explosion safety protection
Signal converter remote version
1 Product designation
2 Type series
3 Remote version
4 Marking without influence on the explosion safety protection
Sensor remote version
1 Product designation
2 Type series sensor
3 Marking without influence on the explosion safety protection

DEVICE DESCRIPTION 2
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2.3 Marking
The marking key is used to mark the devices using the nameplates as illustrated here. On both
the compact devices and the remote versions, the main plate is located on the converter
housing. On the remote versions there is an additional marking on the flow sensor.
Compact devices with two signal converters for dual measurement (Dual Version) are each
marked with a nameplate, which is affixed to each of the converter housings. The details relevant
to explosion protection are identical on both nameplates.
Compact version
1 Product designation
2 Materials of flow sensor and sealing
3 Serial number
4 Year of manufacture
5 Ex data
6 PED data
7 Circuits
8 Observe operating instructions
9 Manufacturer's website

2 DEVICE DESCRIPTION
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Remote version
1 Product designation
2 Materials of flow sensor and sealing
3 Serial number
4 Year of manufacture
5 Ex data
6 PED data
7 Circuits
8 Observe operating instructions
9 Manufacturer's website

DEVICE DESCRIPTION 2
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2.4 Flammable products
Atmospheric conditions
An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under
atmospheric conditions.
It is defined by the following values T
atm
= -20...+60°C / -4...+140°F and P
atm
= 0.8...1.1 bar /
11.6...15.9 psi.
Outside of this range, for most mixtures no key figures are available for the ignition behaviour.
Operating conditions
Vortex flowmeters operate outside of atmospheric conditions, which means that explosion
protection according to the ATEX directive, regardless of the zone assignment, is fundamentally
not applicable due to the lack of key safety data for the interior of the measuring section.
2.5 Equipment category
The vortex flowmeters are designed in category II 3 G according to EN 60079-0, 60079-11 and
EN 60079-15 for use in zone 2.
For more information refer to chapter "Flammable products".
CAUTION!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up on the inside of the flowmeter under operating conditions. The operator is responsible
to ensure that the flowmeter is operated safely in terms of the temperature and pressure of the
products used.
In case of operation with flammable products the measuring units must be included in the
periodic pressure tests of the system.
INFORMATION!
Definition of zone 2 according to EN 1127-1, Appendix B:
An area in which an explosive atmosphere as a result of the mixture of flammable substances in
the form of gas, steam or mist with air is not expected to occur under normal operation. If,
however, such an atmosphere does occur it only lasts for a brief period of time.

2 DEVICE DESCRIPTION
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2.6 Protection types
2.6.1 Protection types for the compact version
The vortex flowmeter is designed in the "non-sparking" protection type in accordance with
EN 60079-15. Explosion protection is ensured in that there are no contacts or hot surfaces with a
sparking effect during operation.
2.6.2 Protection types for the remote version
The vortex signal converter is designed in the "non-sparking" protection type in accordance with
EN 60079-15. The vortex flow sensor and its connecting line are designed as "intrinsically safe
protection level ic". Explosion protection for the signal converter is ensured in that there are no
contacts or hot surfaces with a sparking effect during operation. With the flow sensor, the
limiting of current and voltage also ensures that no energy capable of ignition can occur.
The marking is: II 3G Ex nA II T4...T1 Gc
II 3G Ex nA II T4...T1 GcII 3G Ex nA II T4...T1 Gc
II 3G Ex nA II T4...T1 Gc
II
IIII
II Group II explosion protection
3
33
3Equipment category 3
G
GG
GGas explosion protection
nA
nAnA
nA Non-sparking equipment
II
IIII
II Gas groups IIA, IIB, IIC
T4...T1
T4...T1T4...T1
T4...T1 Temperature classes T4...T1
The marking on the signal converter acc. to ATEX is: II 3G Ex na [ic] IIC T4 Gc
II 3G Ex na [ic] IIC T4 GcII 3G Ex na [ic] IIC T4 Gc
II 3G Ex na [ic] IIC T4 Gc
II
IIII
II Group II explosion protection
3
33
3Equipment category 3
G
GG
GGas explosion protection
nA
nAnA
nA Non-sparking equipment
[ic]
[ic][ic]
[ic] Appropriate intrinsically safe sensor circuit
IIC
IICIIC
IIC Gas groups IIA, IIB, IIC
T4
T4T4
T4 Temperature classes T4...T1
The marking on the flow sensor acc. to ATEX is: II 3G Ex ic IIC T4...T1 Gc
II 3G Ex ic IIC T4...T1 GcII 3G Ex ic IIC T4...T1 Gc
II 3G Ex ic IIC T4...T1 Gc
II
IIII
II Group II explosion protection
3
33
3Equipment category 3
G
GG
GGas explosion protection
ic
icic
ic Intrinsically safe equipment, protection level ic
IIC
IICIIC
IIC Gas groups IIA, IIB, IIC
T4...T1
T4...T1T4...T1
T4...T1 Temperature classes T4...T1

DEVICE DESCRIPTION 2
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2.7 Ambient temperature / temperature classes
The permissible range of ambient temperatures for vortex flowmeters is noted on the nameplate
and is T
amb
=-40°C...+60°C/-40°F...+140°F
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. In fact, the temperature class of a device is a function of the
temperature of both the product and the environment, as well as the size of the measuring units.
The classification for the respective version is outlined in the following tables.
Regardless of the temperature class, the lower limit value for the product temperature is
T
M
=-40°C/-40°F for all versions.
INFORMATION!
The maximum permissible product temperatures listed in the tables are valid under the
following conditions:
• The measuring device is installed and operated in accordance with the installation
instructions in the standard documentation.
• It must be ensured that the flowmeter is not heated by the effects of additional heat radiation
(sunshine, neighbouring system components) and thus operated above the permissible
ambient temperature range.
• Insulation must be limited to the piping.
Unobstructed ventilation of the indicator part must be ensured.

2 DEVICE DESCRIPTION
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Permissible product and ambient temperatures with signal converter or sensor connection box
Permissible product and ambient temperatures with signal converter or sensor connection boxPermissible product and ambient temperatures with signal converter or sensor connection box
Permissible product and ambient temperatures with signal converter or sensor connection box
installed above the measuring unit
installed above the measuring unitinstalled above the measuring unit
installed above the measuring unit
As shown in the figure below, the measuring device should be installed so that it is protected
from direct sunlight.
Maximum permissible product and ambient temperatures per temperature class in °C
Maximum permissible product and ambient temperatures per temperature class in °F
Temperature class T4 T3 T2…T1
T
amb
in °C50 60 40 50 60 40 50 60
Size
DN15…25 110 110 175 175 1 125 1 235 1 180 1 125 1
DN40 …50 110 110 175 165 115 215 165 115
DN65…100 110 110 175 155 110 200 155 110
DN150...300 110 110 175 175 130 1 240 1 190 1 130 1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T4 T3 T2…T1
T
amb
in °F122 140 104 122 140 104 122 140
Size
DN15 …25 230 230 347 347 1 257 1 455 1 356 1 257 1
DN40…50 230 230 347 329 239 419 329 239
DN65…100 230 230 347 311 230 392 311 230
DN150...300 230 230 347 347 266 1 464 1 374 1 266 1
1Permanent service temperature of connecting cable and cable entry min. 176°F