KROHNE OPTIWAVE 400 Series Wiring diagram

OPTIWAVE 5400 C
OPTIWAVE 6400 C
OPTIWAVE 7400 C
Supplementary Instructions for IECEx applications
Supplementary Instructions for IECEx applicationsSupplementary Instructions for IECEx applications
Supplementary Instructions for IECEx applications
OPTIWAVE X400
OPTIWAVE X400OPTIWAVE X400
OPTIWAVE X400 Supplementary Instructions
Supplementary InstructionsSupplementary Instructions
Supplementary Instructions
© KROHNE 07/2018 - 4005292702 - AD IECEX OPTIWAVE x400 R02a en

CONTENTS
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OPTIWAVE X400
1 General safety information 4
1.1 Scope of the document..................................................................................................... 4
1.2 Device description ............................................................................................................ 4
1.3 Standards and approvals.................................................................................................. 5
1.4 Equipment protection levels (EPL)................................................................................... 5
1.4.1 Ex ia-approved devices ........................................................................................................... 5
1.4.2 Ex db ia- and Ex ia tb-approved devices................................................................................. 7
1.4.3 Ex ic devices ............................................................................................................................ 9
1.5 IECEx nameplate ............................................................................................................11
2 Installation 12
2.1 Special conditions........................................................................................................... 12
2.2 Precautions..................................................................................................................... 12
2.2.1 General notes........................................................................................................................ 12
2.2.2 Electrostatic discharge......................................................................................................... 13
2.2.3 Optional purging system....................................................................................................... 14
2.2.4 Optional heating/cooling system ..........................................................................................16
2.3 Operating conditions ...................................................................................................... 17
2.3.1 Ambient and process connection temperatures.................................................................. 17
3 Electrical connections 21
3.1 General notes ................................................................................................................. 21
3.2 Terminal compartment .................................................................................................. 22
3.2.1 How to open the terminal compartment .............................................................................. 22
3.2.2 How to close the terminal compartment ............................................................................. 23
3.3 Terminal tightening capacity.......................................................................................... 24
3.4 Equipotential bonding system........................................................................................ 24
3.5 Ex ia and Ex ic equipment............................................................................................... 25
3.5.1 How to connect the electrical cables ................................................................................... 25
3.5.2 Maximum intrinsically-safe values for the electrical circuit ............................................... 25
3.5.3 Supply voltage ....................................................................................................................... 25
3.6 Ex db ia / Ex ia tb equipment .......................................................................................... 26
3.6.1 General notes........................................................................................................................ 26
3.6.2 How to connect the electrical cables ................................................................................... 26
3.6.3 Supply voltage ....................................................................................................................... 27
4 Start-up 28
5 Service 29
5.1 Periodic maintenance..................................................................................................... 29
5.2 Keep the device clean..................................................................................................... 29
5.3 How to remove the device .............................................................................................. 30
5.4 OPTIWAVE 6300: Replacement of the signal converter................................................. 30
5.5 OPTIWAVE 7300: Replacement of the signal converter................................................. 31
5.6 Manufacturer.................................................................................................................. 31

CONTENTS
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OPTIWAVE X400
5.7 Returning the device to the manufacturer..................................................................... 32
5.7.1 General information.............................................................................................................. 32
5.7.2 Form (for copying) to accompany a returned device............................................................ 33
6 Notes 34

1 GENERAL SAFETY INFORMATION
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1.1 Scope of the document
These instructions are applicable only to the explosion-protection version of the radar level
transmitter. For all other data, use the Quick Start and Handbook. If you do not have these
documents, please contact the nearest office or download them from the manufacturer's
internet site.
1.2 Device description
. They are 2-wire level transmitters that use FMCW (Frequency-Modulated Continuous Wave)
radar technology.
The OPTIWAVE 5400 and OPTIWAVE 7400 measure level, volume, distance to surface and
reflectivity of liquids, pastes and slurries. They are suitable for installation on storage tanks,
process tanks and stilling wells.
The OPTIWAVE 6400 measures level, volume, distance to surface, and reflectivity of solid
particles, granulates and powders. It is suitable for installation on storage tanks and silos.
Measurements are displayed via a DTM (device type manager) for remote communication or on
an optional integrated display screen with wizard-driven setup.
The level transmitter is approved for use in potentially explosive atmospheres when equipped
with the appropriate options.
INFORMATION!
The information in these supplementary instructions only contains the data applicable to
explosion protection. The technical data for the non-Ex version in the Handbook shall be valid in
its current version, provided that it is not rendered invalid or replaced by these supplementary
instructions.
WARNING!
Installation, commissioning and maintenance may only be carried out by "Personnel trained in
explosion protection".

GENERAL SAFETY INFORMATION 1
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1.3 Standards and approvals
You can download the certificate from our interet site.
1.4 Equipment protection levels (EPL)
1.4.1 Ex ia-approved devices
The Ex ia-approved device has the markings that follow for Gas Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•Ex ia IIC T6...T5 Ga/Gb
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•Ex ia IIC T6...T4 Ga/Gb
OPTIWAVE 7400
All versions
•Ex ia IIC T6...T3 Ga/Gb
The Ex ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Gas Groups IIA, IIB and IIC. It is certified for applications requiring
EPL Ga/Gb or EPL Gb equipment, when fitted with the appropriate options. It agrees with
temperature classes T6 thru T1 (Gas Groups) if the temperature limits are obeyed. For more
data, refer to
Ambient and process connection temperatures on page 17.
EPL Ga/Gb equipment is used in zone 0, but it is installed in the boundary wall between zone 0
and zone 1 (the antenna is in zone 0 and the signal converter is in zone 1). EPL Gb equipment is
used in zone 1.
DANGER!
In compliance with the IECEx scheme rules, the IECEx version of the device described in these
Supplementary Instructions agrees with International Standards IEC 60079-0:2011,
IEC 60079-1:2014, IEC 60079-11:2011, IEC 60079-26:2014 and IEC 60079-31:2014. The Ex ia,
Ex db ia / Ex ia tb and Ex ic versions are certified for use in hazardous areas by Kiwa ExVision
B.V. under certificate of conformity KIWA 17.0012X.
WARNING!
Carefully read the IECEx certificate of conformity. Obey the boundary conditions.
WARNING!
Make sure that the installation of the device between zone 0 and zone 1 agrees with
IEC 60079-26.

1 GENERAL SAFETY INFORMATION
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The Ex ia-approved device has the markings that follow for Dust Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•Ex ia IIIC T85°C...T100°C Da/Db
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•Ex ia IIIC T85°C...T130°C Da/Db
OPTIWAVE 7400
PTFE Drop antenna and Horn / Drop / Hygienic antenna with EPDM gasket
•Ex ia IIIC T85°C...T150°C Da/Db
OPTIWAVE 7400
All other versions
•Ex ia IIIC T85°C...T200°C Da/Db
The Ex ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Dust Groups IIIA, IIIB and IIIC. It is certified for applications requiring
EPL Da/Db or EPL Db equipment, when fitted with the appropriate options.
EPL Da/Db equipment is used in zone 20, but it is installed in the boundary wall between zone 20
and zone 21 (the antenna is in zone 20 and the signal converter is in zone 21). EPL Db equipment
is used in zone 21.
DANGER!
Markings for Dust Groups are only applicable to devices with the aluminium housing option.

GENERAL SAFETY INFORMATION 1
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1.4.2 Ex db ia- and Ex ia tb-approved devices
The Ex db ia-approved device has the markings that follow for Gas Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•Ex db ia IIC T6...T5 Ga/Gb
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•Ex db ia IIC T6...T4 Ga/Gb
OPTIWAVE 7400
All versions
•Ex db ia IIC T6...T3 Ga/Gb
The Ex db ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Gas Groups IIA, IIB and IIC. it is certified for applications requiring
EPL Ga/Gb or Gb equipment, when fitted with the appropriate options. It agrees with
temperature classes T6 thru T1 (Gas Groups) if the temperature limits are obeyed. For more
data, refer to
Ambient and process connection temperatures on page 17.
EPL Ga/Gb equipment is used in zone 0, but it is installed in the boundary wall between zone 0
and zone 1 (the antenna is in zone 0 and the signal converter is in zone 1). EPL Gb equipment is
used in zone 1.
DANGER!
Ex db ia and Ex ia tb protection concepts are not applicable to devices with the stainless steel
housing option.

1 GENERAL SAFETY INFORMATION
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The Ex ia tb-approved device has the markings that follow for Dust Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•Ex ia tb IIIC T85°C...T100°C Da/Db
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•Ex ia tb IIIC T85°C...T130°C Da/Db
OPTIWAVE 7400
PTFE Drop antenna and Horn / Drop / Hygienic antenna with EPDM gasket
•Ex ia tb IIIC T85°C...T150°C Da/Db
OPTIWAVE 7400OPTIWAVE 7400
All other versions
•Ex ia tb IIIC T85°C...T200°C Da/Db
The Ex ia tb-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Dust Groups IIIA, IIIB and IIIC. It is certified for applications requiring
EPL Da/Db or EPL Db equipment, when fitted with the appropriate options.
EPL Da/Db equipment is used in zone 20, but it is installed in the boundary wall between zone 20
and zone 21 (the antenna is in zone 20 and the signal converter is in zone 21). EPL Db equipment
is used in zone 21.

GENERAL SAFETY INFORMATION 1
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1.4.3 Ex ic devices
The Ex ic-approved device has the markings that follow for Gas Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•Ex ic IIC T6...T5 Gc
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•Ex ic IIC T6...T4 Gc
OPTIWAVE 7400
All versions
•Ex ic IIC T6...T3 Gc
The Ex ic-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Gas Groups IIA, IIB and IIC. It is designed for applications requiring
EPL Gc equipment, when fitted with the appropriate options. It agrees with temperature classes
T6 thru T1 (Gas Groups) if the temperature limits are obeyed. For more data, refer to
Ambient
and process connection temperatures
on page 17.
EPL Gc equipment is used in zone 2.

1 GENERAL SAFETY INFORMATION
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The Ex ic-approved device has the markings that follow for Dust Groups:
OPTIWAVE 5400 and OPTIWAVE 6400
PP Drop antenna and PP accessories
•Ex ic IIC T85°C...T100°C Dc
OPTIWAVE 5400 and OPTIWAVE 6400
All other versions
•Ex ia IIIC T85°C...T130°C Dc
OPTIWAVE 7400
PTFE Drop antenna and Horn / Drop / Hygienic antenna with EPDM gasket
•Ex ia IIIC T85°C...T150°C Dc
OPTIWAVE 7400
All other versions
•Ex ic IIC T85°C...T200°C Dc
The Ex ic-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Dust Groups IIIA, IIIB and IIIC. It is certified for applications requiring
EPL Dc equipment, when fitted with the appropriate options.
EPL Dc equipment is used in zone 22.
DANGER!
Markings for Dust Groups are only applicable to devices with the aluminium housing option.

GENERAL SAFETY INFORMATION 1
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1.5 IECEx nameplate
Figure 1-1: Nameplate on the signal converter housing
1 IECEx certification number
2 Types of device protection including approved Gas Groups, temperature classes and equipment protection level
Types of device protection including approved Dust Groups, maximum surface temperature and equipment protection
level
3 Ex ia or Ex ic approvals:
Ex ia or Ex ic approvals:Ex ia or Ex ic approvals:
Ex ia or Ex ic approvals: Intrinsically-safe circuit data. Refer to 6for the input voltage range.
Ex db ia or Ex ia tb approvals:
Ex db ia or Ex ia tb approvals:Ex db ia or Ex ia tb approvals:
Ex db ia or Ex ia tb approvals: Maximum voltage in accordance with IEC 60079-0. Refer to 6for the input voltage
range.
4 WARNING: Potential electrostatic charging hazard –see instructions
For more data, refer to
Electrostatic discharge on page 13.
5 Cable entry type and size (M20×1.5, ½NPT)
6 Input voltage range and maximum current (4...20 mA passive –HART)
7 Type code –for more data, refer to "Order code" in the handbook

2 INSTALLATION
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2.1 Special conditions
This device can be installed on the applicable auxiliary equipment: a bypass chamber, a stilling
well or a communicating pipe.
2.2 Precautions
2.2.1 General notes
Make sure that:
•you can get access to the device,
•there is sufficient space around the device for inspections,
•you can see the device nameplate, and
•there are no external forces applied on the device.
WARNING!
When you install the device, obey the conditions in the IECEx certificate of conformity. These
conditions include:
• The special conditions for safe use.
You can download the certificate from our internet site.
DANGER!
This installation must agree with IEC 60079-14: Explosive atmospheres
– Part 14: Electrical
installations design, selection and erection.
DANGER!
The device contains a PTFE boundary wall (unless the device has a hygienic antenna option)
between the process and the signal converter. Do not use the device if the PTFE part is not
resistant to corrosion by the tank product.
If the OPTIWAVE 7400 has the hygienic antenna option, it contains a PEEK boundary wall between
the process and the signal converter. Do not use the device if the PEEK part is not resistant to
corrosion by the tank product.

INSTALLATION 2
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2.2.2 Electrostatic discharge
Do not install in a location where the electrostatic charge can increase. For example:
•locations near ventilation systems,
•locations where there is a risk of an increase in electrostatic charge caused by compressed
air and dust,
•locations near machines that use friction,
•locations near systems that apply electrons as a spray (e.g. near electrostatic painting
systems), and
•locations near other machines and systems that can have large electrostatic charges.
DANGER!
Risk of electrostatic discharge (ESD) from painted surfaces, the plastic sun cover, the hygienic
antenna, the Drop antenna, the flange plate protection, the extension protection and the slanted
flange.
DANGER!
Make sure that the device and adjacent objects do not rub together.
Make sure that all personnel and equipment are correctly grounded.
If dirt collects on the device, clean it with a damp cloth.
ESD warning
Figure 2-1: ESD warning (on the device nameplate)
1 Text: Warning! Potential electrostatic hazard –see instructions

2 INSTALLATION
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2.2.3 Optional purging system
This option is applicable to:
•devices that have horn antennas, and
•gas and dust atmospheres
Figure 2-2: Risk of ESD
1 Sun cover
2 Drop antenna
3 OPTIWAVE 5400 and OPTIWAVE 7400:
OPTIWAVE 5400 and OPTIWAVE 7400:OPTIWAVE 5400 and OPTIWAVE 7400:
OPTIWAVE 5400 and OPTIWAVE 7400: Extension protection (option for the Drop antenna with one or more antenna ex-
tensions)
4 OPTIWAVE 5400 and OPTIWAVE 7400:
OPTIWAVE 5400 and OPTIWAVE 7400:OPTIWAVE 5400 and OPTIWAVE 7400:
OPTIWAVE 5400 and OPTIWAVE 7400: Flange plate protection (option for the Drop antenna)
5 OPTIWAVE 6400:
OPTIWAVE 6400:OPTIWAVE 6400:
OPTIWAVE 6400: Slanted flange (option for the Drop antenna)
6 OPTIWAVE 7400:
OPTIWAVE 7400:OPTIWAVE 7400:
OPTIWAVE 7400: Hygienic antenna
Figure 2-3: Purging system
1 NPTF purging connection
INFORMATION!
If delivered with the device, the purging connection is plugged with a 1/4 NPTF or 1/8 NPTF
screw and engaged on a minimum of 3
½ threads.

INSTALLATION 2
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Connection and operation of the purging connection are the responsibility of the user. The
operator is also responsible for selection of a suitable fluid to purge the device.
Devices installed in a gas atmosphere
•The purging fluid temperature must be less than the ignition temperature of the gas or
vapour atmosphere
Devices installed in a dust atmosphere
•Dust clouds:
Dust clouds:Dust clouds:
Dust clouds: The purging fluid temperature must be less than 2/3 of the ignition temperature
•Dust layers (thickness <5 mm / 0.2
Dust layers (thickness <5 mm / 0.2Dust layers (thickness <5 mm / 0.2
Dust layers (thickness <5 mm / 0.2¨):
):):
): The difference between the purging fluid temperature
and the ignition temperature must be more than +75°C / +135°F
Devices installed in a gas or dust atmosphere
•The purging fluid temperature must be between the minimum and maximum limits for the
gasket (for more data, refer to the handbook) and the type of antenna (for more data, refer to
Ambient and process connection temperatures on page 17)
CAUTION!
If the 1/4 NPTF or 1/8 NPTF screw is removed from the purging connection, make sure that the
installation agrees with the Ex requirements for the purging system.
WARNING!
If the two conditions are applicable, then use the worst condition.
For data about dust layers thicker than 5 mm / 0.2
¨ , refer to regulations given in EN 60079-14:
Explosive atmospheres
– Part 14: Electrical installations design, selection and erection.

2 INSTALLATION
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2.2.4 Optional heating/cooling system
This option is applicable to:
•devices that have horn antennas, and
•gas atmospheres
The operating pressure of the heating/cooling system must not be more than 6 barg / 87 psig.
The process pressure must not be more than 2 barg / 29 psig.
The heating/cooling fluid temperature must be less than the ignition temperature of the gas or
vapour atmosphere
The heating/cooling fluid temperature must be between the minimum and maximum limits for
the gasket (for more data, refer to the handbook) and the type of antenna (for more data, refer to
Ambient and process connection temperatures on page 17)
Figure 2-4: Heating/cooling system
1 G 1/2 heating/cooling system connection

INSTALLATION 2
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2.3 Operating conditions
The allowable ambient temperature and related process connection temperature range for the
device depends on the temperature classes and maximum surface temperature marked on the
nameplate.
2.3.1 Ambient and process connection temperatures
The tables that follow are applicable in these conditions:
•Device installation must agree with the instructions given in the handbook.
•Make sure that the device temperature does not increase because of other heat sources
(sunlight, adjacent system components etc.). The device must not be operated above the
maximum permitted ambient temperature.
•Do not put insulation around the signal converter. Make sure that the airflow around the
signal converter is sufficient. It is permitted to have insulation on the pipe or stilling well and
the process connection.
WARNING!
The gasket temperature must be in the approved limits. For more data, refer to "Pressure and
temperature ranges" in the Installation chapter of the handbook. The type of gasket and gasket
material must agree with the process.
WARNING!
The reference point for the process temperature is the flange facing (flanges), the thread stop
(threaded connections) or the facing (hygienic connections) of the device. In the tables that
follow, this reference point will be referred to as the "process connection temperature".
WARNING!
An explosive atmosphere is a mixture of air and flammable gases, vapour, mist or dust in
atmospheric conditions. If you do not use the device in these conditions (T
atm
= -20...+60 ° C and
p
atm
= 0.8...1.1 barg), do an analysis of the risk of ignition.
T
atm
= atmospheric temperature and p
atm
= atmospheric pressure.
WARNING!
Make sure that the maximum process connection temperature and maximum ambient
temperature are not more than the values given in the tables.

2 INSTALLATION
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OPTIWAVE 5400 and OPTIWAVE 6400
Temperature
class for
EPL Ga/Gb,
EPLGborEPLGc
Maximumsurface
temperature for
EPL Da/Db,
EPL Db or EPL Dc
Maximum ambient temperature Maximum process
connection
temperature
(max. process
temperature)
Aluminium housing Stainless steel
housing
[°C]
T6 T85°C+60 +60 +60
+44 +35 +85
T5 T100°C+75 +75 +75
+59 +50 +100
T4 1 T130°C1 +57 +46 +115
+48 +31 +130
1Max. process connection temperature is +100°C, if the PP Drop antenna and PP accessories are used
Temperature
class for
EPL Ga/Gb,
EPLGborEPLGc
Maximumsurface
temperature for
EPL Da/Db,
EPL Db or EPL Dc
Minimum ambient temperature Minimum process
connection
temperature
(min. process
temperature)
Aluminium housing Stainless steel
housing
[°C]
All classes 1 All surface
temperatures 1
-40 -40 -40
-33 -30 -50
1Min. process connection temperature is -20°C, if a Kalrez®6375 gasket is used. Min. process connection temperature is -40°C, if an
FKM/FPM gasket is used. Min. process connection temperature is -40°C, if the PP Drop antenna and PP accessories are used.

INSTALLATION 2
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OPTIWAVE 7400
Temperature
class for
EPL Ga/Gb,
EPLGborEPLGc
Maximumsurface
temperature for
EPL Da/Db,
EPL Db or EPL Dc
Maximum ambient temperature Maximum process
connection
temperature
(max. process
temperature)
Aluminium housing Stainless steel
housing
[°C]
T6 T85°C+60 +60 +60
+54 +51 +85
T5 T100°C+75 +75 +75
+69 +66 +100
T4 T135°C+72 +67 +115
+68 +61 +135
T3 1 T200°C1 +64 +55 +150
+58 +45 +180
+54 +38 +200
1Max. process connection temperature is +150°C, if the device has a Metallic Horn, Drop or hygienic antenna with an EPDM gasket or a
PTFE Drop antenna
Temperature
class for
EPL Ga/Gb,
EPLGborEPLGc
Maximumsurface
temperature for
EPL Da/Db,
EPL Db or EPL Dc
Minimum ambient temperature Minimum process
connection
temperature
(min. process
temperature)
Aluminium housing Stainless steel
housing
[°C]
All classes 1 All surface
temperatures 1
-40 -40 -40
-37 -36 -50
1Min. process connection temperature is -15°C, if the device has a hygienic antenna with an FKM/FPM gasket. Min. process connection
temperature is -20°C, if a Kalrez®6375 gasket is used. Min. process connection temperature is -30°C, if a Metaglas®feedthrough is
used. Min. process connection temperature is -30°C, if the device has a hygienic antenna with an EPDM gasket. Min. process connection
temperature is -40°C, if the device has a Horn or Drop antenna with an FKM/FPM gasket.

2 INSTALLATION
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Refer to the tables that follow if:
•you replace an OPTIWAVE 7300 signal converter with the OPTIWAVE 7400 signal converter
without a distance piece, or
•you replace an OPTIWAVE 6300 signal converter with the OPTIWAVE 6400 signal converter
without a distance piece.
INFORMATION!
These tables are applicable if the process connection has a distance piece and you replace an
OPTIWAVE 7300 signal converter with the OPTIWAVE 7400 signal converter. For more data about
the replacement of the signal converter refer to OPTIWAVE 7300: Replacement of the signal
converter on page 31
.
These tables are also applicable if the process connection has a distance piece and you replace
an OPTIWAVE 6300 signal converter with the OPTIWAVE 6400 signal converter. For more data
about the replacement of the signal converter refer to
OPTIWAVE 6300: Replacement of the
signal converter on page 30
.
Temperature
class for
EPL Ga/Gb,
EPLGborEPLGc
Maximumsurface
temperature for
EPL Da/Db,
EPL Db or EPL Dc
Maximum ambient temperature Maximum process
connection
temperature
(max. process
temperature)
Aluminium housing Stainless steel
housing
[°C]
T6 T85°C+60 +60 +60
+50 +43 +85
T5 T100°C+75 +75 +75
+65 +58 +100
T4 T135°C+67 +56 +115
+59 +43 +135
T3 T150°C+54 +33 +150
Temperature
class for
EPL Ga/Gb,
EPLGborEPLGc
Maximumsurface
temperature for
EPL Da/Db,
EPL Db or EPL Dc
Minimum ambient temperature Minimum process
connection
temperature
(min. process
temperature)
Aluminium housing Stainless steel
housing
[°C]
All classes 1 All surface
temperatures 1
-40 -40 -40
-36 -33 -50
1Min. process connection temperature is -20°C, if a Kalrez®6375 gasket is used. Min. process connection temperature is -30°C, if a
Metaglas®feedthrough is used. Min. process connection temperature is -40°C, if the device has a Horn or Drop antenna with an
FKM/FPM gasket.