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