KROHNE IFMx080KATEX User Manual

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©KROHNE07/027.02253.21.00

Addition to the
installation and operating instructions

ALTOFLUX IFM 4080 K-EEx / i-EEx
PROFIFLUX IFM 5080 K-EEx / i-EEx
VARIFLUX IFM 6080 K-EEx / i-EEx

Compact electromagnetic
flowmeters

WARNING !

No changes regarding safety may be made to the devices. Unauthorized
changes might affect the explosion safety of the devices.

Be sure to follow these instructions !
IMPORTANT !

• The presc riptions and regulations as well as the electrical data described in
the EC-type examination certificate must be obeyed.

• Beside the instructions for electrical installations in non-hazardous
locations according to the applicable national standard (e.g. IEC 364),
especially the regulations in EN 60079-14 "Electrical installations in
hazardous locations" or equivalent national standard must be followed.

• Installation, establishment, utilization and maintenance are only allowed to
be executed by personnel with an education in explosion safety!

These additional instructions are an extension to the Installation and Operating Instructions and
only apply to the EEx version of the IFM x080 K - EEx or IFM x080 K / i -EEx electromagnetic
compact flow meter. All technical information described in the “Installation and Operating
Instructions” are applicable, when not specifically excluded, completed or replaced by the
instructions in these additional instructions.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 2

Content

1 System components 3

1.1 General information ALTOFLUX IFM 4080 / … EEx 4

1.2 General information PROFIOFLUX IFM 5080 / … EEx 6

1.3 General information VARIFLUX IFM 6080 / … EEx 8

1.4 IFC 090 / … -EEx signal converter 10

1.4.1 Electronics compartment 10

1.4.2 Terminal compartment 10

1.5 Electronics unit 11

2 Electrical connection 11

2.1 Equipotential bonding system 12

2.2 Connecting cables 12

2.3 Connection diagram 13

2.4 Regular IFC 090 - EEx electronics unit 14

2.5 Modis version IFC 090 I 15

2.6 Connection diagrams MODIS 16
3 Operation of the signal converter 22
4 Maintenance 22
5 Service 23

5.1 General information for replacements 24

5.2 Replacement of electronics unit 25

5.3 Replacement of power fuse(s) 27

5.4 Changing power supply voltage 30
6 Ordering information 31

6.1 Regular IFC 090 - EEx electronics unit 31

6.2 MODIS version IFC 090 - EEx electronics unit 31
7 Declaration of conformity 31

7.1 Declaration of conformity of ALTOFLUX IFM 4080 K … EEx 32

7.2 Declaration of conformity of PROFIOFLUX IFM 5080 … EEx 33

7.3 Declaration of conformity of VARIFLUX IFM 6080 … EEx 34
8 EC-type examination Certificates 34

8.1 ALTOFLUX IFM 4080 K … EEx Certificate 35

8.2 PROFIOFLUX IFM 5080 … EEx Certificate 38

8.3 VARIFLUX IFM 6080 … EEx Certificate 40

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 3

1 System components

1.1 General information ALTOFLUX IFM 4080 / … EEx

This meter complies with the European Directive 94/9/EC (ATEX 100a) and approved for
hazardous classified locations of Zone 1 and 2 under EC-type Examination Certificate number:

KEMA 01 ATEX 2200 X

The compact flowmeter is available in two types, namely:
IFM 4080 K-EEx regular explosion protected version;
IFM 4080 K/i-EEx, MODIS version. This type has intrinsically safe signal output circuits, which are
provided by two on the IFC 090i-EEx electronics unit installed MODIS modules.
The regular IFM 4080 K-EEx compact flowmeter is designed for ambient temperatures (Ta) in the
range of -20°C (special -40°C) up to +60°C, the MODIS version type IFM 4080 K/i-EEx is rated for
ambient temperatures from -20°C up to +60°C.

The allowed process liquid temperature is limited by the maximum occuring surface temperature
of system components in the combustible atmosphere that (possibly) surrounds the apparatus,
determined by the temperature class of the atmosphere (first column of the tables). See table 1
and 2 below for details.

For dusts the second column of the two below listed tables is applicable.

Temperature classification DN200 and larger

Temperature class
(for gases)

Max. surface
temperature
(for dusts)

T6 T85°C 75°C 70°C 70°C
T5 T100°C 95°C 90°C 75°C
T4 T135°C 130°C 115°C 75°C
T3 T180°C 150°C 115°C 75°C

Temperature classification DN 25…150 with PFA liner

Temperature class
(for gases)

Max. surface
temperature
(for dusts)

T6 T85°C 70°C 70°C 70°C
T5 T100°C 85°C 85°C 85°C
T4 T135°C 120°C 120°C 115°C
T3 T180°C 180°C 180°C 115°C

Use heat -resistant cables above - - 50°C

The IFM 4080 K / … EEx flowmeter consists of the IFC 090/…-EEx signal converter unit, which is
screwed on top of the primary head (i.e. measuring unit).

The compact flowmeter is marked with one of the codes below, depending on the meter size:
DN25-150 II 2GD EEx d [ib] IIC T6…T3 (EEx d terminal compartment) or

II 2GD EEx de [ib] IIC T6…T3 (EEx e terminal compartment).

DN200 and up II 2GD EEx de [ib] IIC T6…T3 (both EEx d and EEx e terminal compartment).
In case of the MODIS version IFM 4080 K / i-EEx , the electronics unit of type IFC 090i-EEx is

provided with protective modules, which provide intrinsically safe output signals of category "ia".
The flowmeter is then marked with one of the following codes:

DN25-150 II 2GD EEx d [ia] [ib] IIC T6…T3 (EEx d terminal comp artment) or
DN200 and up II 2GD EEx de [ia] [ib] IIC T6…T3

II 2GD EEx de [ia] [ib] IIC T6…T3 (EEx e terminal compartment)
(both EEx d and EEx e terminal compartment)

Maximum process liquid temperature
Ta ≤ 40°C Ta ≤ 50°C Ta ≤ 60°C

Maximum process liquid temperature
Ta ≤ 40°C Ta ≤ 50°C Ta ≤ 60°C

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 4

T85...180%%DC

A%%-Vdc

8W

-25%

+30%

2002

Term. 24Vac,+10%/-15%,48-63Hz,10W

AMBIENT TEMPERATURE: -20...+60%%DC.

ENCLOSURE: T6 %%242 20 MIN.; T5 %%242 11 MIN.

T

I /I

I+/I

B1+/B1

IP65/67

EEx ia IIC

EEx ia IIC

EEx ia IIC

EEx ib IICAT85...180%%DC

[ib] [ia] IIC T6...T3

2002

For details see the EC-type Examination Certificate in Sect. 8.1 of these instructions.

Primary head

The primary head contains two field coils (see table for type of protection) and two electrodes in
type of protection intrinsic safety category "ib" according to EN 50020.

Types of protection of primary head

Meter size Type of protection

DN25 up to DN150

Housing:

Flameproof enclosure "d" according to EN 50018

Electrodes: Intrinsic safety "ib" according to EN 50020

DN200 and larger

Field coils: Increased safety "e" according to EN 50019
Electrodes: Intrinsic safety "ib" according to EN 50020

NOTE: The intrinsically safe electrode circuits of the IFM 4080K/…-EEx compact flowmeter

are only internal circuits and not accessible for the customer

Data plates of ALTOFLUX IFM 4080 K
IFM 4080 K … EEx IFM 4080 K / i … EEx

Kerkeplaat 12
3313 LC Dordrecht
The Netherlands

Altometer

TYPE

IFM 4080 K-EEx

KEMA 01 ATEX 2200 X

II 2GD EEx d

AMBIENT TEMPERATURE: -40...+60%%DC.
SEE CERTIFICATE FOR MAXIMUM TEMPERATURES.

SERIAL NO.

POWER

48-63Hz

INTRINSICALLY SAFE CIRCUITS: ELECTRODE CIRCUIT,
ONLY INTERNAL CONNECTIONS.

DO NOT OPEN ENCLOSURE WHEN ENERGIZED !
WAITING TIME BEFORE OPENING OF THE FLAMEPROOF

ENCLOSURE: T6 %%242 20 MIN.; T5 %%242 11 MIN.
MAX. SHORT-CIRCUIT CURRENT OF MAINS:

10VA Um=253V

SPACE FOR ADDITIONAL DATA

[ib] IIC T6...T3

+Vac

0344

YEAR OF

PRODUCTION

IP65/67

Altometer

TYPE

IFM 4080 K/i-EEx

KEMA 01 ATEX 2200 X

II 2GD EEx d

SEE CERTIFICATE FOR MAXIMUM TEMPERATURES.
SERIAL NO.

POWER

DO NOT OPEN ENCLOSURE WHEN ENERGIZED !
WAITING TIME BEFORE OPENING OF THE FLAMEPROOF

MAX. SHORT-CIRCUIT CURRENT OF MAINS:

INTRINSICALLY SAFE CIRCUITS
Electrode circuit: only internal connections

1L ,0L
Term. 100...230Vac,+10%/-15%

L, N

%%uTerm.

T

B1/B1

T

B2/B2

T

D/D

Kerkeplaat 12
3313 LC Dordrecht
The Netherlands

~~

24Vdc,+30%/-25%,10W,Um=253V

48-63Hz,8W,Um=253V

Passive output
Ui=30V; Ii=250mA; Pi=1.0W
Ci=5nF; Li=0;

Passive output
Ui=30V; Ii=300mA; Pi=4.2W
Ci=5nF; Li=0;

Active output
Uo=23.5V; Io=98mA; Po=0.6W
Co=132nF; Lo=4mH;

0344

YEAR OF

PRODUCTION

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 5

1.2 PROFIFLUX IFM 5080 K … EEx

The Profiflux IFM 5080 K/…-EEx magnetic-inductive compact flowmeter is in accordance with the
European Directive 94/9/EC (ATEX 100a) and approved for hazardous classified locations of
Zone 1 and 2 under EC-type Examination Certificate number:

KEMA 01 ATEX 2262 X

The compact flowmeter is available in two types, namely:

• IFM 5080 K-EEx regular explosion protected version;

• IFM 5080 K/i-EEx, MODIS version. This type has intrinsical safe signal output circuits, which
are provided by two on the IFC 090i-EEx electronics unit installed MODIS modules (see
Sect. 1.5 for details.

The regular IFM 5080 K-EEx compact flowmeter as well as the so -called MODIS version type
IFM 5080 K/i-EEx is designed for ambient temperatures (Ta) of -20°C up to +60°C. The allowed
process liquid temperature is limited by the maximum occuring surface temperature of system
components in the combustible atmosphere that (possibly) surrounds the apparatus, determined
by the temperature class of the atmosphere, see table 1 below.

Temperature classification

Max. surface

Class

T6 T80°C 60°C 55°C not allowed
T5 T95°C 75°C 75°C 70°C
T4 T130°C 115°C 115°C 75°C
T3 T165°C 155°C 135°C 75°C

Temperature

Maximum process liquid temperature Temperature

Ta ≤ 40°C Ta ≤ 50°C Ta ≤ 60 °C

The IFM 5080 K/…-EEx compact flowmeter consists of the IFC 090/…-EEx signal converter unit,
which is screwed on top of the IFS 5000-EEx primary head (i.e. measuring unit). The compact
flowmeter is marked with the followi ng code below:
II 2 GD EEx dme [ib] IIC T6…T3

In case of the MODIS version IFM 5080 K/i-EEx, the electronics unit of type IFC 090i-EEx is
provided with protective modules, which provide intrinsical safe output signals of category "ia".
The flowmeter is then marked with the code
II 2 GD EEx dme [ib] [ia] IIC T6…T3

For details see the EC-type Ex amination Certificate in Sect. 8.2 at the end of these additional
instructions.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 6

T80...165%%DC

-%%

+30%

Vdc

-25%

IP65/67

2002

WAITING TIME BEFORE OPENING OF THE FLAMEPROOF

MAX. SHORT-CIRCUIT CURRENT OF MAINS: A

ENCLOSURE: T6 %%242 20 MIN.; T5 %%242 11 MIN.

T

I /I

I+/I

B1+/B1

L, N

~

EEx ia IIC

EEx ib IIC

T80..165%%DC

IP65/67

2002

Primary head
The IFS 5000-EEx primary head of the IFM 5080 K/…-EEx compact flowmeter contains two
field coils above and below the measuring tube and two electrodes inside the ceramics
measuring tube on both sides. The field coils have type of protection increased safety "e"
according to EN 50019 and encapsulation "m" according to EN 50028. The electrodes are
provided with type of protection intrinsic safety "ib" according to EN 50020.

The primary head is available in meter sizes DN2.5 up to DN100. The IFC 090/…-EEx signal
converter (described in Sect. 1.4-1.5) is mounted on top of the primary head by four recessed
head screws of size M6 with internal hexagonal socket set.

Note: The intrinsically safe electrode circuits of the IFM 5080K/…-EEx compact flowmeter are
only internal circuits and not accessible for the customer.

Data plates of ALTOFLUX IFM 5080 K

IFM 5080 K … EEx

Kerkeplaat 12
3313 LC Dordrecht

Altometer

TYPE

IFM 5080 K-EEx

KEMA 01 ATEX 2262 X

II 2GD EEx dme [ib] IIC T6...T3
AMBIENT TEMPERATURE: -20...+60%%DC.
SEE CERTIFICATE FOR MAXIMUM TEMPERATURES.

SERIAL NO.

POWER

48-63Hz

INTRINSICALLY SAFE CIRCUITS: ELECTRODE CIRCUIT,
ONLY INTERNAL CONNECTIONS.
DO NOT OPEN ENCLOSURE WHEN ENERGIZED !
WAITING TIME BEFORE OPENING OF THE FLAMEPROOF
ENCLOSURE: T6 %%242 20 MIN.; T5 %%242 11 MIN.

MAX. SHORT-CIRCUIT CURRENT OF MAINS: A

SPACE FOR ADDITIONAL DATA

The Netherlands

Vac +
10VA Um=253V

0344

YEAR OF

PRODUCTION

8W

IFM 5080 K / i … EEx

Altometer

TYPE

IFM 5080 K/i-EEx

KEMA 01 ATEX 2262 X

II 2GD EEx dme [ib] [ia] IIC T6...T3

AMBIENT TEMPERATURE: -20...+60%%DC.
SEE CERTIFICATE FOR MAXIMUM TEMPERATURES.

SERIAL NO.

POWER

DO NOT OPEN ENCLOSURE WHEN ENERGIZED !

INTRINSICALLY SAFE CIRCUITS
Electrode circuit: only internal connections

Term. 24Vac,+10%/-15%,48-63Hz,10W
1L ,0L

Term. 100...230Vac,+10%/-15%

%%uTerm.

Passive output

T

B1/B1
B2/B2

D/D

Ui=30V; Ii=250mA; Pi=1.0W

T

Ci=5nF; Li=0; EEx ia IIC

T

Passive output
Ui=30V; Ii=300mA; Pi=4.2W
Ci=5nF; Li=0; EEx ia IIC

Active output
Uo=23.5V; Io=98mA; Po=0.6W
Co=127nF; Lo=4mH;

Kerkeplaat 12
3313 LC Dordrecht
The Netherlands

~

24Vdc,+30%/-25%,10W,Um=253V

48-63Hz,8W,Um=253V

0344

YEAR OF

PRODUCTION

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 7

1.3 VARIFLUX IFM 6080 K … EEx

The Variflux IFM 6080 K/…-EEx magnetic-inductive compact flowmeter is in accordance with the
European Directive 94/9/EC (ATEX 100a) and approved for hazardous classified locations of
Zone 1 and 2 under EC-type Examination Certificate number:

KEMA 02 ATEX 2021 X

The compact flowmeter is available in two types, namely:

• IFM 6080 K-EEx regular explosion protected version

• IFM 6080 K/i-EEx, MODIS version. This type has intrinsical safe signal output circuits, which
are provided by two on the IFC 090i-EEx electronics unit installed MODIS modules.

The regular IFM 6080 K-EEx compact flowmeter is designed for ambient temperatures (Ta) in the
range of -40°C up to +60°C, the so -called MODIS version IFM 6080 K/i-EEx is rated for ambient
temperatures from -20°C up to +60°C. The allowed process liquid temperature is limited by the
occuring surface temperature of system components in the combustible atmosphere that
(possibly) surrounds the apparatus, determined by the temperature class of the atmosphere,
see table.

Temperature classification
Temperature Maximum surface Maximum process liquid temperature

class Temperature

Ta ≤ 50°C Ta ≤ 60°C

T6 T80°C 70°C 70°C
T5 T95°C 85°C 85°C
T4 T130°C 120°C 100°C
T3 T190°C 180°C 100°C

The regular IFM 6080 K-EEx compact flowmeter consists of the IFC 090-EEx signal converter,
which is screwed on top of the IFS 6000-EEx primary head (i.e. measu ring unit). The compact
flowmeter is marked with the following code below, depending on the meter size:

• DN2.5-15: II 2GD EEx dme [ib] IIC T6…T3

• DN25-80: II 2GD EEx d [ib] IIC T6…T3 ("EEx d" terminal compartment) or
II 2GD EEx de [ib] IIC T6…T3 ("EEx e" terminal compartment)

• DN2.5-15: II 2GD EEx dme [ib] [ia] IIC T6…T3

• DN25-80: II 2GD EEx d [ib] [ia] IIC T6…T3 ("EEx d" terminal compartment) or
II 2GD EEx de [ib] [ia] IIC T6…T3 ("EEx e" terminal compartment)

All meters are also marked with the maximum surface temperature T80…T190°C because of the
dust classification. See for details the EC-type examination certificate in Sect. 8.3 of these
additional instructions.

Primary head

The IFS 6000-EEx primary head of the IFM 6080 K/…-EEx compact flowmeter contains two field
coils and two electrodes in type of protection intrinsic safety category "ib" according to EN 50020.
The type of protection of the field coils depends on meter size.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 8

DO NOT OPEN ENCLOSURE WHILE ENERGIZED !

ENCLOSURE: T6 %%242 20 MIN.; T5 %%242 11 MIN.

T80...190%%DC

A-%%Vdc

+30%

-25%

2002

WAITING TIME BEFORE OPENING OF THE FLAMEPROOF

ENCLOSURE: T6 %%242 20 MIN.; T5 %%242 11 MIN.

T

I /I

I+/I

B1+/B1

%%uTerm.

L, N

SERIAL NO.

IP65/67

EEx ia IIC

EEx ia IIC

EEx ia IIC

EEx ib IICAT80...190%%DC

[ib] [ia] IIC T6...T3

2002

Types of protection of primary head
Meter size Type of protection

Field coils: Increased safety "e" according to EN 50019

DN2.5 up to DN15

Encapsulation "m" according to EN 50028
Electrodes: Intrinsic safety "ib" according to EN 50020
Housing: Flameproof enclosure "d" according to EN

DN25 up to DN80

50018
Electrodes: Intrinsic safety "ib" according to EN 50020

The IFC 090/…-EEx signal converter (described in Sect. 1.4-1.5) is mounted on top of the
primary head by four recessed head screws of size M6 with internal hexagonal socket set.

Note

The intrinsically safe electrode circuits of the IFM 6080K/…-EEx compact flowmeter are only
internal circuits and not accessible for the customer.

The two field coils inside the primary head are connected in series and provided with the

type of protection increased safety "e" and encapsulation "m" (DN2.5-15). Meter size

DN25-80 has a flameproof primary housing.

Data plates of ALTOFLUX IFM 6080 K

IFM 6080 K … EEx

Altometer

IFM 6080 K-EEx

TYPE

KEMA 02 ATEX 2021 X

II 2GD EEx d

AMBIENT TEMPERATURE: -40...+60%%DC.
SEE CERTIFICATE FOR MAXIMUM TEMPERATURES.

SERIAL NO.

POWER

48-63Hz

INTRINSICALLY SAFE CIRCUITS: ELECTRODE CIRCUIT,
ONLY INTERNAL CONNECTIONS.

WAITING TIME BEFORE OPENING OF THE FLAMEPROOF

MAX. SHORT-CIRCUIT CURRENT OF MAINS:

Vac +
10VA Um=253V

SPACE FOR ADDITIONAL DATA

Kerkeplaat 12
3313 LC Dordrecht
The Netherlands

[ib] IIC T6...T3 IP65/67

0344

YEAR OF

PRODUCTION

8W

IFM 6080 K / i … EEx

Altometer

IFM 6080 K/i-EEx

TYPE

KEMA 02 ATEX 2021 X

II 2GD EEx d

AMBIENT TEMPERATURE: -20...+60%%DC.
SEE CERTIFICATE FOR MAXIMUM TEMPERATURES.

POWER

DO NOT OPEN ENCLOSURE WHILE ENERGIZED !

MAX. SHORT-CIRCUIT CURRENT OF MAINS:

INTRINSICALLY SAFE CIRCUITS
Electrode circuit: only internal connections

Term. 24Vac,+10%/-15%,48-63Hz,10W

~~

1L ,0L
Term. 100...230Vac,+10%/-15%

T

B1/B1

T

B2/B2

T

D/D

Kerkeplaat 12
3313 LC Dordrecht
The Netherlands

24Vdc,+30%/-25%,10W,Um=253V

48-63Hz,8W,Um=253V

Passive output
Ui=30V; Ii=250mA; Pi=1.0W
Ci=5nF; Li=0;

Passive output
Ui=30V; Ii=300mA; Pi=4.2W
Ci=5nF; Li=0;

Active output
Uo=23.5V; Io=98mA; Po=0.6W
Co=132nF; Lo=4mH;

0344

YEAR OF

PRODUCTION

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 9

1.4 IFC 090/…-EEx signal converter

The IFC 090/…-EEx signal converter consists of a cylindrical housing of die-casted aluminum,
which has two separate compartments, divided from each other by an integrated wall with casted
flameproof terminal feed-through. The neck at the bottom of the housing contains a flameproof
cable feed-through. The signal converter housing is on both ends closed by a cylindrical threaded
cover with O-ring sealing. The housing has an ingress protection degree of at least IP67 conform
to EN 60529.

1.4.1 Electronics compartment

The electronics compartment accommodates the pre-certified IFC 090…-EEx electronics unit with
approval number PTB 98 ATEX 2012 U. The electronics compartment is designed with type of
protection flameproof enclosure "d" according to EN 50018. It is closed by a threaded flameproof
display cover with glass window.

1.4.2 Terminal compartment

The terminal compartment has seven terminals for connection of the power supply and signal
output circuits. Sect. 2 (Connection diagram) shows the terminal arrangement for the regular and
MODIS version of the IFC 090/…-EEx signal converter. The terminal arrangement of the MODIS
version (i.e. IFC 090i-EEx) is shown in Sect. 2 (Modis Converter). Two of the terminals are used
for connection of the non-intrinsically safe power supply and four terminals (marked with "*") for
the intrinsically safe, category "ia" signal outputs of the MODIS modules. The non-intrinsically and
intrinsically safe terminals are separated from each other by a metal dividing plate, which is
screwed to the remaining (not connected) M4 terminal. The two non-intrinsically safe power
supply terminals are covered by an insulating plate.

The terminal compartment (with standard type of protection increased safety "e") is standard
equipped with two ATEX approved "EEx e" cable glands. The terminal compartment can also be
provided as a flameproof enclosure "d", in which case ATEX approved "EEx d" cable glands of
size Pg13.5, Pg16 or M20x1.5 are either factory installed or must be installed by the customer.
For flameproof conduit systems, the terminal compartment must have type of protection
flameproof enclosure "d" according to EN 50018. The conduits must be sealed by "EEx d"
approved (within the ATEX 100a directive) sealing devices (i.e. stopping box) directly at the
conduit entrances of the as flameproof enclosure performed terminal compartment.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 10

1.5 Electronics unit

This electromagnetic compact flowmeter can be equipped with the regular IFC 090-EEx or with
the IFC 090i-EEx electronics unit with intrinsically safe signal outputs (i.e. MODIS version). This
version is descripted in the following.

Regular IFC090-EEx electronics unit

The IFC 090-EEx is used in the regular IFM 4080 K-EEx and can be equipped with one of the
following power supplies (depends on the area of application).

Electrical data for power supply

Power supply Terminal Function Electrical data

AC-versions

AC/DC-version

L
N
PE

1L½
0L½
FE

Live
Neutral
Protective Ground

Live
Neutral
Functional Ground

Un = 100/115/200/230 Vac -15/+10%
Pn = approx. 10 VA, Um = 253 V

Un = 24 V ac/dc
AC: -15/+10%, Pn=10 VA
DC: -25/+30%, Pn=8 W
Um = 253 V

The IFC 090-EEx electronics unit is equipped with the following in-/output circuits. Terminals B1,
B⊥ and B2 can be configured as status or pulse outputs or as control inputs via the software. See
the table below for the electrical data of these in-/output circuits.

Electrical data of in-/output circuits

Terminals Description Nominal voltage Maximum current
I+, I Current output 15 V 22 mA
B1, B⊥, B2

Pulse, status, control in-/outputs 32 V 150 mA

IFC 090i -EEx unit with MODIS modules

The IFC 090i-EEx electronics unit is equipped with a pair of MODIS-modules. It is equipped with
one of the following power supplies.

Electrical data of IFC 090i-EEx electronics unit

Power supply Terminals Function Electrical data

AC-version

AC/DC-version

L
N
PE

1L½
0L½
FE

Live
Neutral
Protective Ground

Live
Neutral
Functional Ground

Un = 100…230 Vac –15%/+10%
Pn = 15 VA, Um = 253 V

Un = 24 Vac/dc
AC: -15%/+10% or 20.4…26.4 Vac
DC: -25%/+30% or 18…32 Vdc
Pn = 10 W, Um = 253 V

NOTE: The mains fuses for both electronics units are listed in Sect. 6 of this manual.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 11

2 Electrical connection

2.1 Equipotential bonding system

All EEx and EEx/i flowmeters must always be incorporated into the equipotential bonding system
of the hazardous area. This connection can be achieved through the PE/FE conductor connected
to the PE terminal in the terminal compartment (see figure of terminal arrangement below) or
through a separate PE conductor, cross sectional area at least 4 mm2, connected to the external
PE clamp, placed below the converter housing.

2.2 Connecting cables
NOTE: The below described cables are shown in the following connection diagram .

Cable A:

Signal cable for current output and binary outputs (pulse and status output): The cable parameters
must be in accordance with the regulations in the EN 60079-14 "Electrical installations in
hazardous locations" or an equivalent national standard. For the MODIS version with IFC 090i­EEx electronics unit (right detail in connection diagram) the signal cable for the intrinsically safe
signal in-/outputs must also conform the requirements as specified in the relevant standard
national code of practice for the installation of electrical apparatus with type of protection Intrinsic
Safety "i".

Cable B:

Power supply cable: The cable parameters must be in accordance with the regulations of the EN
60079-14 "Electrical installations in hazardous locations" or an equivalent national standard.

Rated voltage
Examples: H07...-., H05...-.

≥ 500 V

Equipotential bonding conductor
Cross-sectional area:

4 mm2 (equivalent to AWG 10)

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 12

Flow tube

of Zone 1 and 2

E

Increased safe field coil circuit

Coil

BINARY

CURRENT

MAINS

ELECTRONICS COMPARTMENT (always "EEx d")

IFC 090

-

EEx

PE

2

Flameproof (EEx d) c

able

B A

Coil

IFC 090i

-

EEx

x x x x

PE

INTRINSICALLY SAFE

Separation plate

Unused terminal

Flameproof (EEx d)

B A

2.3 Connection diagram

L N PE 100-230 Vac
SIGNAL IN-/OUTPUTS L½ L½ FE 24 Vac/dc

Signal Converter

SIGNAL IN-/OUTPUTS L N PE 100-230 Vac
(i.e. MODIS) L½ L½ FE 24 Vac/dc

B1 B⊥ B2 I+ I L N

OUTPUTS OUTPUT SUPPLY

TERMINAL COMPARTMENT
Standard "EEx e" (Optional "EEx d")

electrode circuits field coil circuits

(OPTIONAL)

E

FE

feed-through

Field coil wires

Signal Converter

terminal feed-through

Hazardous locations

1L½ 0L½

FE

OPTION: MODIS

EQUIPOTENTIAL BONDING CONDUCTOR ≥ 4 mm

Electrode cables

Intrinsically safe electrode circuits

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 13

IFS 4000…-EEx

Primary Head

PULSE, STATUS OUTPUTS

½

000

Electronic or

e.g. signal

Ri

≤

500

Ω

I+

I

mA

IFS x000 …

-

EEx

2.4 Regular IFC 090-EEx electronics unit

The field cables that enter the terminal compartment of the IFC 090-EEx signal converter unit (i.e.
power supply, current and binary outputs) are non-intrinsically safe. To connect external devices
to the signal output terminals, the wiring requirements for the type of protection of the
compartment (standard: increased safety "e", optional: flameproof "d") must be conform to the
international or national standard involved (e.g. EN 60079-14).
The terminal arrangement is shown by figure 1 below.

Terminal arrangement in terminal compartment

RESP. CONTROL INPUTS

Primary head

B1 B⊥ B2 I+ I L N (100…240Vac / 48…63 Hz)
L½ L½ (24Vac/dc)

BINARY CURRENT
OUTPUTS OUTPUT

PE (Protective Earth) terminal
FE (Functional Earth) terminal

Passive pulse/status output

Active current output

B1 B⊥ B2

U

ext

I ≤ 150 mA

electro­mechanical
totalizer

U

ext

Note:

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 14

The binary outputs (terminals B1, B⊥ and B2) can only be configured as passive
outputs, the current output (terminals I+ and I) can only be configured as active output.

I ≤ 150 mA

indicator

≤ 32Vdc/24 Vac

+

_

Metal dividing

NC 1L½

0L½

24 Vac/dc

PE Protective Earth terminal

Connecting terminals

Connecting

Cable entrance for

Cable entrance for

NC = not connected

2.5 MODIS version IFC 090i -EEx electronics unit

The field cables of the non-intrinsically safe power supply and the intrinsically safe, category "ia"
signal outputs enter the terminal compartment of the IFC 090i-EEx signal converter unit via two
separate entrances. To connect external devices to the intrinsically safe signal output terminals,
the wiring requirements for their type of protection as well as of the compartment (standard:
increased safety "e", optional: flameproof enclosure "d") must be conform to the international or
national standard involved (e.g. EN 60079-14).

Terminal arrangement in terminal compartment

plate IS / non-IS
terminals

for intrinsically safe

signal in -/outputs

non-intrinsically
safe power supply

L N 100…240 Vac

terminals for

intrinsically safe
signal cable

non-intrinsically
safe power supply
cable

The non-intrinsically safe terminals for connection of the power supply (1L½ and 0L½) must be
connected according to the relevant standard code of practice for electrical apparatus intended for
use in potentially hazardous locations, type of protection Increased Safety "e" or type of protection
Flameproof Enclosure "d", depending on the type of protection of the terminal compartment of the
signal converter housing.

To gain access to the connection terminals of the power supply, the half -circular cover plate of
insulating material must be slightly lifted at one end and then rotated downwards, see the
instruction on the cover plate. After connection of the power supply cable, the half -circular cover
plate must be restored into its original position, so that the minimum clearances and creepage
distances towards the intrinsically safe signal in-/output terminals are maintained.

For details, see diagram on terminals compartment MODIS on next page.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 15

Insulating cover plate

Terminal compartment MODIS version IFC 090i-EEx

Sticker with handling information
for insulating cover plate

Sticker indicating the intrinsically
safe signal in-/output circuits

The PE (or FE) conductor must be connected to the press-fitted M5 clamp terminal marked inside
the terminal compartment. This conductor must be guided through the rectangular opening in the
metal dividing plate that separates the non-intrinsically safe power supply terminals from the
intrinsically safe signal in-/output termin als.

2.6 Connection diagrams MODIS

Sect. 2.3 shows the block diagram of the EEx electromagnetic compact flowmeter. The power
supply (terminals 1L½, 0L½) is connected via cable B. The PE terminal must be connected to the
protective ground conductor of the mains supply.

The IFC 090i-EEx electronics unit is provided with intrinsically safe signal in-/output circuits due to
the installed pair of MODIS modules in accordance with the table below.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 16

Overview of MODIS modules

Module Terminal designation Function / Intrinsically safe maximum data

Current output (0/4-20 mA), passive

P-SA

FA-ST B1, B1⊥ or B2, B2 ⊥

F -PA

F -FF

DC-I I+, B1+

I ⊥, I

D, D ⊥

D, D ⊥

Ui = 30 V, Ii = 250 mA, Pi = 1.0 W
Ci = 5 nF, Li ≈ 0
Pulse (frequency) output or status in-/output, all passive
The function can be set by software
Ui = 30 V, Ii = 250 mA, Pi = 1.0 W
Ci = 5 nF, Li ≈ 0
Fieldbus module, type Profibus system, passive

Ui = 30 V, Ii = 300 mA, Pi = 4.2 W
Ci = 5 nF, Li ≈ 0
Fieldbus module, type Fieldbus Foundation, passive
Ui = 30 V, Ii = 300 mA, Pi = 4.2 W
Ci = 5 nF, Li ≈ 0
Intrinsically safe voltage source for the passive module
P-SA or FA-ST, so that active operation is possible.

Uo = 23.5 V, Io = 98 mA, Po = 0.6 W
Co = 132 nF , Lo = 4 mH

Note!

When modules P-SA (or FA-ST) and DC-I are connected
in series, the internal capacitance Ci of 5 nF must be
subtracted from the Co of 132 nF. So the data plate will
list a Co of 127 nF.

Besides the shown intrinsically safe maximum values for voltages and current -which are based
on certain fault conditions as prescribed by the standard EN 50 020 - the nominal values for
current and voltage must also be respected otherwise a proper functioning of the modules is not
guaranteed!

Nominal voltage and current values for the MODIS modules
MODIS module Nominal values for voltage and current

P-SA

(passive current output )

FA-ST

(frequency / pulse / status output
or control input)

DC-I

(active voltage source)

Current: 4 ... 20 mA
Working voltage: 8 ... 30V
Voltage drop : 8V at 4mA
Working voltage: 6 ... 30V
Working current: < 110 mA
Voltage drop: in ON-state: < 2V at 110 mA
Leakage current in OFF-state: < 900 µA at 30V

Control input:
Input voltage LOW level: < 3V
Input voltage HIGH level: > 7V
Frequency range : 0 .. 12 KHz
Voltage: 20V
Current 30 mA
Internal resistance: 260

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 17

The active module DC-I is needed in the 24 Vac/dc power supply version to form an active current
or pulse output in combination with one of the passive modules P-SA or FA-ST. Due to limited
space it is not available for 100...230 Vac supply versions.

Possible combinations of the installed MODIS modules for the 24 Vac/dc power supply
version of the IFC 090i -EEx

IFC 090i -

Part No. MODIS modules Terminal designation
EEx
version

Ex-i1 2.11582.01.00 P-SA FA-ST
Ex-i2 2.11582.03.00 P-SA F-PA

I ⊥
I ⊥

I B1
I D

B1⊥
D ⊥

Ex-i3 2.11582.02.00 P-SA DC-I I+ I
Ex-i4 2.11582.05.00 FA-ST F-PA B1

B1⊥

D

D ⊥

Ex-i5 2.11582.06.00 FA-ST DC-I B1+ B1
Ex-i6 2.11582.07.00 FA-ST FA -ST B2
Ex-i7 2.11582.08.00 P-SA F-FF

I ⊥

Ex-i8 2.11582.09.00 FA-ST F-FF B1

B1

B2⊥
I D

D

B1⊥

B1 ⊥
D ⊥
D ⊥

Possible combinations of the installed MODIS modules for the 100-230 Vac power supply
version of the IFC 090i -EEx

IFC 090i -

Part No. MODIS modules Terminal designation
EEx
version

Ex-i1 2.12253.01.00 P-SA FA-ST
Ex-i2 2.12253.02.00 P-SA F-PA

I ⊥
I ⊥

Ex-i4 2.12253.03.00 FA-ST F-PA B1
Ex-i6 2.12253.04.00 FA-ST FA -ST B2
Ex-i7 2.12253.05.00 P-SA F-FF

I ⊥

Ex-i8 2.12253.06.00 FA-ST F-FF B1

I B1
I D

D

B1⊥

B1

B2⊥
I D

D

B1⊥

B1⊥
D ⊥
D ⊥
B1 ⊥
D ⊥
D ⊥

Due to mechanical and electrical limitations, only the listed pairs of MODIS modules are possible.
The two modules each use two terminals of the bottom four terminals of the flameproof terminal
feed-through in the dividing wall between the electronics and terminal compartment of the signal
converter housing, except for the combination with module DC-I (only applicable for 24 Vac/dc
versions), where only two of the four terminals are used. Interconnection of the two modules, P­SA with DC-I or. FA-ST with DC-I is made internally.

The flameproof terminal feed-through has seven terminals in total, the top two terminals are used
for connection of the power supply, the third one is only used for mounting of a metal dividing
plate with insulating cov er plate. The remaining four are used for the intrinsically safe signal in­/output circuits of the installed MODIS modules.
The metal dividing plate and the insulating cover plate warrant the required separation distances
(i.e. clearances, creepage distanc es and distances through insulation) between the non­intrinsically safe power supply terminals and the intrinsically safe signal in-/output circuits. The
insulating cover plate is provided with a sticker that contains important instructions how to remove
and re-install the cover plate and the conditions under which it should be established (circuits not
live !).

Important !

Carefully follow the instructions on the sticker that is glued to the top of the
insulating cover plate that covers the non-intrinsically safe power supply
terminals !

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 18

For the connection diagrams of the intrinsically safe signal in-/outputs of the installed MODIS
modules in the IFC 090i-EEx electronics unit (see figure 6, 7 and 8 on the following pages). It has
to be noted that the intrinsically safe signal in-/outputs may only be connected to the following
listed apparatus' (registering devices like amp -meters, pulse counters, etc.):
EEx-approved intrinsically safe apparatus;
EEx-approved associated apparatus;
Passive apparatus as defined in your national standard for installation of electrical apparatus in
hazardous locations (e.g. EN 60079-14).

Other types of apparatus may only be connected to the intrinsically safe signal in-/outputs through
EEx-approved safety barriers, isolating interface units and the like. These barriers or units are not
depicted in the connection diagrams of figure 6, 7 and 8 for reasons of readability. It is assumed
that they are an integrated part of the registering devices or as separate devices connected in
series with them. The registering devices may only be installed in the hazardous location if they
also have a type of protection for explosion safety according to the European Standards of the EN
500xx series, or if they are constructed as prescribed in your standard national code of practice.

When the intrinsically safe signal in-/outputs are connected to other intrinsically safe or associated
apparatus, the maximum safety values (i.e. entity parameters) of all intrinsically safe circuits have
to be considered.

Important ! The 100…230 Vac power supply versions of the IFC 090i-EEx signal converter

electronics unit with MODIS modules can only be equipped with passive
outputs. Therefore the connection diagrams with the numbers 2, 4, 5, 7, 9, 11
and 12 are applicable for the 100…230 Vac power supply versions.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 19

Connection diagrams 1 to 4 of the intrinsically safe signal in-/outputs

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 20

Connection diagrams 5 to 8 of the intrinsically safe signal in-/outputs

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 21

Connection diagrams 9 to 12 of the intrinsically safe signal in-/outputs

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 22

3 Operation of the signal converter

The i-EEx compact flowmeters are always equipped with magnet sensors. In that way it is
possible to change the settings of the converter with aid of the magnet-bar without the necessity to
open the flameproof converter housing in the hazardous area.

For the program functions and settings of the converter the standard Installation and operating
instructions have to be consulted. It must be noted that - depending on the IFC090 i-EEx version
installed - not all output/input functions are available.

Following menus do not apply for the IFC090 i-EEx versions Ex-i2 and Ex-i3:
(see also Sect. 4.4. "Table of settable functions" in the standard "Installation and operating
instructions" of the IFC090 K/F signal converter)

1.01 à VALUE P

1.06 Output/input B1

1.07 Output/input B2

Fct. Text Description and settings

1.00 1.00 OPERATION Operations menu

1.01 FULL SCALE ...
à VALUE P

1.06 Output/Input B1

1.07 Output/Input B2

1.06 PULS B1

1.06

1.07

1.06

1.07

3.00 3.00 INSTALL. Installation menu

As a consequence, the chapters included in the standard Installations and operating instructions,
giving detailed descriptions of these menus, must be skipped.

3.02 FLOWMETER ...

à VALUE P

3.07 HARDWARE

1.06 PULS B1

1.06 STATUS B1

1.07 STATUS B2

STATUS B1
STATUS B2
CONTROL B1
CONTROL B2

1.06 CONTROL B1

1.07 CONTROL B2

3.02 à VALUE P

3.07 HARDWARE

4 Maintenance

The IFM x080 K/…-EEx electromagnetic compact flowmeters are maintenance free with regard to
the flowmetering properties. Within the scope of the periodical inspections, which are required for
electrical apparatus that are installed and used in hazardous classified locations, it is
recommended to check the flameproof enclosure on signs of damage or corrosion. This concerns
the converter housing.

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 23

D

5 Service

See Sect. 5 or contact your (local) KROHNE sales representative for the ordering information of
spare parts or replacements of IFC 090…-EEx electronics units and/or power fuses.

5.1 General information for replacements
IMPORTANT ! The following instructions must be followed carefully, if the IFC 090/…-EEx

signal converter housing has to be opened respectively closed again!

Before opening

Make absolutely sure there is no explosion hazard!
If necessary provide a ”Gas-free certificate” !
Make sure that all connecting cables are safely isolated from the power supply !

When the instructions above are strictly followed, the cover (with glass window) of the electronics
compartment may be removed. First unscrew the recessed head screw of the interlocking device
by a hollow-head screw wrench size 3, until the cover can rotate freely. Unscrew the cover with
the special plastic wrench (black) that is supplied with the apparatus.

After opening

The copper ground strip at the back of the electronics unit must be securely screwed to the
housing (back-end of electronics compartment) by screw SE (see figure 9 below). The electronics
unit is screwed into the electronics compartment by two screws D. Before screws SE and D can
be accessed, the display unit must be removed via screws A.
Before the cover is screwed back into the housing, the screw-thread must be clean and well­greased with an acid and resin-free grease, e.g. silicone grease.
Screw the cover as tight as possible into the housing by hand, until it cannot be opened by hand
anymore. Screw the recessed head screw of the interlocking device tight.

IFC 090-EEx electronics unit after removal of display unit

SE

Note:

Safe earth
connection

A

Power fuse in fuse-holder

D

Mains transformer

B

SE

Signal converter housing

C

Flat cable of display unit

Power supply PC-board

A

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 24

5.2 Replacement of electronics unit

A

A

Display unit of IFC 090…-EEx

Refer to the standard Installation and
Operating Instructions for detailed
information about resetting and
reprogramming the new electronics unit
after replacement. The customer
specific data (like the value of the
internal totalizer) are stored in
DATAPROM IC -18, which must be
transferred from the "old" to the "new"
electronics unit. See Sect. 8.7 of the
standard Installation and Operating
Instructions for detailed information.

Before commencing work, note the instructions in Sect. 5.1 ("Before opening").

Then continue as follows:

1. Remove the display cover of the electronics compartment.

2. Unscrew the two screws A (M3) of the display unit (see figure 10) and turn it carefully aside.

3. Disconnect the 2-pole field circuit connector (item B in figure 9) and the 3-pole electrode circuit
connector (item C). See figures in Sect. 5.1 and the following.

4. Unscrew the two mounting screws D of the electronics unit and unscrew SE, which fixes the
copper ground strip to the back of the housing. A screwdriver with a long shaft (≥ 200 mm) is
most suitable for unscrewing screw SE (e.g. screwdriver type Philips No. 2).

5. Carefully remove the electronics unit of the converter housing (see the remark below).

6. Check if the voltage setting (only applicable for AC power supplies) and power fuse rating are
correct on the new electronics unit. If necessary, change the voltage setting or replace the
power fuse (see Sect. 5.3 and 5.4 of this manual).

7. Carefully insert the electronics unit (keep cables aside, see remark below). Then mount the unit
completely into the housing and fix the screws. First the two screws D, then screw SE and
reconnect the 2-pole field circuit connector B and the 3-pole electrode circuit connector C to the
right counter-plugs on the electronics unit (see figure in Sect. 5.1).

8. Finally screw the display unit back on the frame of the electronics via the two screws A.

9. Screw the cover of the electronics compartment back into the housing.

Note the instructions of Sect. 5.1 ("After opening") during reassembling.

IMPORTANT ! Carefully keep the connecting cables of the field coil and electrode circuits to

the side of the housing, while removing respectively inserting the electronics
unit into the signal converter housing. This is to prevent damaging of the
connecting cables!

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 25

D SE

IFC 090-EEx electronics unit (115/230 Vac version)

Copper earth strip

C: Electrode circuit
connector (3-pole)

Display unit

(back side)

B: Field circuit
connector (2 -pole)

Flat cable of

display unit

D

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 26

5.3 Replacement of power fuse(s)

The power fuse(s) of the different IFC 090…-EEx electronics units (regular or MODIS) have a
different rating and are located on slightly different locations on the power supply printed circuit
board. Only the power fuse on the 100…230 Vac power supply version of the regular IFC 090­EEx electronics unit can be reached without removing the complete unit out of the housing (only
the display unit has to be unscrewed).

Regular IFC 090-EEx with 24 Vac/dc power supply

Note: Before commencing work, read the instructions in Sect. 5.1 ("Before opening"). Then

continue as follows:

1. Remove the cover of the electronics compartment.

2. Unscrew the two screws marked with A of the display unit and turn it carefully aside.

3. Disconnect the 2-pole field circuit connector (item B) as well as the 3-pole electrode circuit

connector (item C). See figure in Sect.5.1 and 5.2.

4. Unscrew the two mounting screws D of the electronics unit and screw SE, which fixes the

copper ground strip to the integrated aluminum dividing wall at the back of the electronics

compartment. Use a screwdriver with a long shaft (≥ 200 mm) like type Philips No. 2 for
screw SE. Then take out the electronics unit, but be careful with the connecting cables, so
that they do not get damaged.

5. The defective power fuse(s) F1 and/or F2 (see following figure) can be replaced now. The 24

Vac/dc power supply uses two sub-miniature fuses type TR 5 that are rated T1.25 A in
accordance with IEC 127-3 publication (part No. 5.09080.00.00).

6. Reassemble in reverse order (points 3 through 1).

Note: Read the instructions of Sect. 5.1 ("After opening") during reassembling.

IFC 090-EEx electronics unit with 24 Vac/dc power supply

F1

F2

F1 and F2 fuses of power supply

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 27

Mains

Sticker with fuse

Voltage

S

ide

of

display
unit

Indication of

Regular IFC 090-EEx with 100…230 Vac power supply

Note: Before commencing work, read the instructions in Sect. 5.1 ("Before opening").

Then continue as follows:

1. Remove the cover of the electronics compartment

2. Unscrew the two screws A of the display unit and turn the display unit carefully aside.

3. The fuse-holder, in which the power fuse in accordance with IEC 127-2 size Ø5 x 20 mm is
mounted, is now accessible to replace the defect power fuse F1 by a new fuse with the same
rating. The rating depends on the voltage setting of the power supply unit. The power supply
of 100/115 Vac requires a fuse of T200mA (part No. 5.05678.00.00) and the 200/230 Vac
requires a fuse of T125 mA (part No. 5.06627.00.00).

The fuse rating is also shown by the yellow sticker that is glued on the mains transformer, which
can only be seen after the regular IFC 090-EEx electronics unit is completely removed from the
flameproof signal converter housing. See figure on the next page.

NOTE: In case of any doubt about the fuse rating or the voltage setting of the unit, remove the

4. Reassemble the unit in reverse order (points 2 and 1).

Note Read the instructions of Sect. 5.1 ("After opening") during reassembling.

complete unit from the housing as described in Sect. 5.2 and check in the following
figure depicted items. Change when needed !

Power supply version 115/230 Vac

transformer

Power fuse F1

(in fuse holder)

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 28

voltage

selector

Power fuse (24 Vac/dc power supply)

Fuse_230V

NOTE:

PTB 97 ATEX 2265 U

PTB

97 ATEX 2265 U

MODIS version IFC 090i -EEx
Note: Before commencing work, read the instructions in Sect. 5.1 ("Before opening").

Then continue as follows:

1. Remove the cover of the electronics compartment

2. Unscrew the two screws A of the display unit and turn it carefully aside.

3. Disconnect the 2-pole field circuit connector (item B) and the 3-pole electrode circuit
connector (item C). See figure s in Sect. 5.1 and 5.2 for details.

4. Unscrew the two screws D and screw SE by a screwdriver with a long shaft (200 mm). Take
out the electronics unit, but do not damage the connecting cables. See the note
IMPORTANT.

5. The defective power fuse (see following figure) can be replaced now. Use a fuse rated at
T1.25H250V (part No. 5.06232.00.00) for the 24 Vac/dc power supply and a fuse rated at
T1.6H250V (Part No. 5.07823.00.00) for the 100…230 Vac power supply. Note that the
locations are slightly different (the 24 Vac/dc supply version is shown).

6. Reassemble in reverse order (points 4 through 1).

Note: Read the instructions of Sect. 5.1 ("After opening") during reassembling
.

Important! Carefully keep the connecting cables of the field coil and electrode circuits to the

side of the housing, while removing or inserting the electronics unit into the signal
converter housing. This is to prevent damaging of the connecting cables!

IFC 090i -EEx electronics unit (24 Vac/dc version is shown)

The power fuse on the 100…230 Vac version is located on a slightly different
position than the fuse of the 24 Vac/dc version ! See location " Fuse_230V".

[EEx ia] IIC

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 29

5.4 Changing power supply voltage

This only applies to the regular IFC 090-EEx electronics unit with 100-230 Vac power supply.
Note: Before commencing work, read the instructions in Sect. 5.1 ("Before opening").

Then continue as follows

:

1. Remove the cover of the electronics compartment.

2. Unscrew the two screws A of the display unit and turn the display unit carefully aside.

3. Unscrew the two mounting screws D of the electronics unit and screw SE, which fixes the
copper ground strip at the back of the housing. A screwdriver with a long shaft (200 mm) can
best be used to unscrew SE (e.g. screwdriver type Philips No. 2).

4. Disconnect the 2-pole and 3-pole connectors and carefully remove the electronics unit.

5. The voltage setting of the power supply can be changed by turning the dummy dual-in-line
block (i.e. voltage selector, see last figure in Sect. 5.3) over 180° in its socket. The position of
the notch on the dummy dual-in-line block indicates the voltage setting. Also see the sticker
that is glued on the mains transformer.

6. Reassemble in reverse order (points 4 through 1).

7. Screw the cover of the electronics compartment back into the housing.

Note: Note the instructions of Sect. 5.1 ("After opening") during reassembling.

IMPORTANT! Carefully keep the connecting cables of the field coil and electrode circuits to

the side of the housing, while inserting the electronics unit into respectively
removing it from the signal converter housing. This is to prevent damaging of
the connecting cables!

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 30

TR5, 35A @

6 Ordering information

In case of questions about spare or replacing parts contact your local Krohne representative. The
part numbers of the several parts are listed in the sections below.

6.1 Regular IFC 090-EEx electronics unit

The table below shows the regular (non-MODIS) IFC 090-EEx versions available with the possible
power supply units and the accompanying power fuse(s).

IFC 090-EEx electronics unit Power fuse(s)
Power supply Part No. Symbol Type Rating Part No.

230/240 Vac
115/120 Vac
200 Vac F1 125 mA T 5.06627.00.00
100 Vac

24 Vac/dc

2.10664.10.00

2.10664.13.00

2.10665.10.00 F1 + F2

6.2 MODIS version IFC 090i -EEx electronics unit

The following table gives a summary of the IFC 090i-EEx electronics units available (MODIS
version) and the matching part number. These IFC 090i-EEx electronics units are either provided
with a 24 Vac/dc power supply or a 100…230 Vac power supply.

MODIS modules Part number

Version

Position A Position B 24 Vac/dc power

Ex-i1 P-SA FA-ST 2.11582.01.00 2.12253.01.00
Ex-i2 P-SA F-PA 2.11582.03.00 2.12253.02.00
Ex-i3 P-SA DC-I 2.11582.02.00 not available
Ex-i4 FA-ST F-PA 2.11582.05.00 2.12253.03.00
Ex-i5 FA-ST DC-I 2.11582.06.00 not available
Ex-i6 FA-ST FA -ST 2.11582.07.00 2.12253.04.00
Ex-i7 P-SA F-FF 2.11582.08.00 2.12253.05.00
Ex-i8 FA-ST F-FF 2.11582.09.00 2.12253.06.00

The following table below lists the accompanying power fuse.

Power supply version

24 Vac/dc

100…230 Vac

Notes: All G-fuses listed comply with IEC 127-2. They are Ø5 x 20 mm in size and blow at

1500 A at 250 V .

Fuse type TR5 is sub-miniature and blows at 35 A at 250 V. It , too, complies with IEC 127-3. The
regular IFC 090-EEx electronics unit with 24 Vac/dc power supply contains two of these fuses in
the primary circuits, labelled as F1 and F2.

F1 125 mA T 5.06627.00.00
F1 200 mA T 5.05678.00.00

G-fuse
Ø5x20
1500A @

F1

250V

200 mA T 5.05678.00.00

1.25 A T 5.09080.00.00

250V

100…230 Vac power

supply

supply

Power fuse for IFC 090i -EEx electronics units
Type Rating Part number

G-fuse Ø5x20
1500A @ 250V
G-fuse Ø5x20
1500A @ 250V

1.25 A T (T1.25H250V) 5.06232.00.00

1.6 A T (T1.6H250V) 5.07823.00.00

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 31

7 Declarations of conformity

7.1 Declaration of conformity of ALTOFLUX IFM 4080 K … EEx

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 32

7.2 Declaration of conformity of PROFIFLUX IFM 5080 K … EEx

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 33

7.3 Declaration of conformity of VARIFLUX IFM 6080 K … EEx

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 34

8 EC-type examination Certificates

8.1 IFM 4080 K … EEx Certificate

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 35

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 36

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 37

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 38

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 39

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 40

8.2 IFM 5080 K … EEx Certificate

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 41

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 42

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 43

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 44

8.3 IFM 6080 K … EEx Certificate

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 45

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 46

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 47

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 48

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 49

Australia

KROHNE Australia Pty Ltd.
Unit 19 No.9, Hudson Ave.
Castle Hill 2154, NSW
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Austria

KROHNE Ges.m.b.H.
Wagramerstr.81
Donauzentrum
A-1220 Wien
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Belgium

KROHNE Belgium N.V.
Brusselstraat 320
B-1702 Groot Bijgaarden
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Brazil

KROHNE Conaut
Controles Automaticos Ltda.
Estrada Das Águas Espraiadas, 230 C.P. 56
06835 - 080 EMBU - SP
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

China

KROHNE Measurement Instruments Co. Ltd.
Room 7E, Yi Dian Mansion
746 Zhao Jia Bang Road
Shanghai 200030
TEL.: [phone]
FAX: [phone]
Cellphone: [phone]
e-mail: [e-mail]

CIS

Kanex KROHNE Engineering AG
Business-Centre Planeta, Office 403
ul. Marxistskaja 3
109147 Moscow/Russia
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Czech Republic

KROHNE CZ, spol. s r.o.
Sobe˘s˘ická 156
CZ-63800 Brno
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

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Taiwan
Thailand
Turkey
Tunesia
Venezuela
Yugoslavia

France

KROHNE S.A.
Usine des Ors
B.P. 98
F-26 103 Romans Cedex
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Germany

KROHNE Messtechnik
GmbH & Co. KG
Ludwig-Krohne-Straße
D-47058 Duisburg
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

India

KROHNE Marshall Ltd.
A-34/35, M.I.D.C.
Industrial Area, H-Block,
Pimpri Poona 411018
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Italy

KROHNE Italia Srl.
Via V. Monti 75
I-20145 Milano
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Korea

Hankuk KROHNE
2 F, 599-1
Banghwa-2-Dong
Kangseo-Ku
Seoul
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Netherlands

KROHNE Altometer
Kerkeplaat 12
NL-3313 LC Dordrecht
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

KROHNE Nederland B.V.
Kerkeplaat 12
NL-3313 LC Dordrecht
TEL.: [phone]
FAX: [phone]
Service Direkt: [phone]
e-mail: [e-mail]

Norway

Krohne Instrumentation A.S.
Ekholtveien 114
NO-1526 Moss
P.O. Box 2178,NO-1521 Moss
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]
Internet: www.krohne.no

South Africa

KROHNE Pty.Ltd.
163 New Road
Halfway House Ext. 13
Midrand
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Spain

I.I. KROHNE Iberia, S.r.L.
Poligono Industrial Nilo
Calle Brasil, n°. 5
E-28806 Alcalá de Henares-Madrid
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Switzerland

KROHNE AG
Uferstr. 90
CH-4019 Basel
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

United Kingdom

KROHNE Ltd.
Rutherford Drive
Park Farm Industrial Estate
Wellingborough,
Northants NN8 6AE, UK
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

USA

KROHNE Inc.
7 Dearborn Road
Peabody, MA 01960
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Overseas Representatives

Other Countries:

KROHNE Messtechnik
GmbH & Co. KG
Ludwig-Krohne-Str.
D-47058 Duisburg
TEL.: [phone]
FAX: [phone]
e-mail: [e-mail]

Subject to change without notice