KROHNE IFM4042KEEx User Manual
12/01
Addition to the
Electromagnetic
flowmeter in 2-wire
technology
ALTOFLUX 2W
IFM 4042 K-EEx
Compact flowmeter
installation and
operating
instructions
7.xxxxx.xx.xx
WARNING !
No changes may be made to the devices. Unauthorized changes
might affect the explosion safety of the devices.
These additional instructions are an extension to the Installation and Operating
Instructions and only applies for the EEx version of the IFM 4042 K electromagnetic
compact flowmeter. All technical information described in the Installation and
Operating Instructions are applicable, when not specifically excluded or replaced by
the instructions in these additional instructions.
CONTENTS
1. SYSTEM COMPONENTS...............................................................................................................2
1.1 General information...................................................................................................................2
1.2 Primary head...............................................................................................................................2
1.3 IFC 040-EEx signal converter ..................................................................................................3
1.3.1 Electronics compartment....................................................................................................3
1.3.2 Terminal compartment........................................................................................................3
1.3.3 Cable or conduit entries......................................................................................................4
2. ELECTRICAL CONNECTION........................................................................................................4
2.1 Detailed description of the output circuits..............................................................................5
2.2 Safety-technical data.................................................................................................................6
2.3 Connection examples................................................................................................................6
3. OPERATION OF THE SIGNAL CONVERTER...........................................................................8
4. REPLACEMENT OF ELECTRONICS UNIT................................................................................9
5. EQUIPOTENTIAL BONDING SYSTEM.....................................................................................10
6. TECHNICAL DATA .........................................................................................................................10
7. MAINTENANCE..............................................................................................................................10
8. CONNECTION DIAGRAM.............................................................................................................11
9. ORDERING INFORMATION.........................................................................................................12
10. DATA PLATES.............................................................................................................................12
11. EC-TYPE EXAMINATION CERTIFICATE...............................................................................15
Be sure to follow these instructions !
IMPORTANT !
• The prescriptions and regulations as well as the electrical data described in the
EC-type examination certificate must be obeyed.
• Beside the instructions for electrical installations in non-hazardous locations according
to the applicable national standard (equivalent of IEC 364, e.g. VDE 0100), especially
the regulations in EN 60079-14 "Electrical installations in hazardous locations" or
equivalent national standard (e.g. DIN VDE 0165) must be followed.
• Installation, establishment, utilization and maintenance are only allowed to be
executed by personnel with an education in explosion safety !
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1. SYSTEM COMPONENTS
1.1 General information
The Altoflux 2W IFM 4042 K-EEx electromagnetic compact flowmeter in 2-wire technology is
in accordance with European Directive 94/9 EG (ATEX 100a) and approved for hazardous
classified locations of Zone 1 and 2 by the KEMA conform to the European Standards of the
EN 500xx series. The IFM 4042 K-EEx has the following approval number.
KEMA 01 ATEX 2200 X
The IFM 4042 K-EEx compact flowmeter is designed for ambient temperatures in the range
of -40°C up to +60°C.
The allowed process liquid temperature is a.o. limited by the combustible atmosphere that
(possibly) surrounds the apparatus, which again is 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.
Max. surface
class
(for gases)
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
Table 1: Temperature classification DN10…20 and DN200 and larger.
class
(for gases)
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
Table 2: Temperature classification DN25…150 with PFA liner.
The IFM 4042 K-EEx flowmeter consists of the IFC 040-EEx signal converter unit, which is
screwed on top of the primary head (i.e. the measuring unit). The compact flowmeter is
marked with one of the codes below, depending on the meter size:
• DN10-20: II 2GD EEx dme [ib] IIC T6…T3.
• DN25-150: II 2GD EEx de [ib] IIC T6…T3 ("EEx e" or "EEx d" terminal compartment).
• DN200 and up: II 2GD EEx de [ib] IIC T6…T3.
temperature
(for dusts)
Max. surface
temperature
(for dusts)
Maximum process liquid temperatureTemperature
Ta ≤ 40°C Ta ≤ 50°C Ta ≤ 60°C
Maximum process liquid temperatureTemperature
Ta ≤ 40°C Ta ≤ 50°C Ta ≤ 60°C
For details see the EC-type examination certificate in Section 10 of these instructions.
1.2 Primary head
The primary head is the measuring unit of the IFM 4042 K-EEx compact flowmeter and
contains two field coils (see table 3 on the next page for the type of protection) and two
electrodes in type of protection intrinsic safety category "ib" according to EN 50020.
2
Meter size Type of protection
Field coils: Increased safety "e" according to EN 50019
DN10 up to DN20
Electrodes: Intrinsic safety "ib" according to EN 50020
DN25 up to DN150
DN200 and larger
NOTE:
The intrinsically safe electrode circuits of the IFM 4042 K-EEx compact flowmeter are
only internal circuits and not accessible for the customer.
Housing: Flameproof enclosure "d" according to EN 50018
Electrodes: Intrinsic safety "ib" according to EN 50020
Field coils: Increased safety "e" according to EN 50019
Electrodes: Intrinsic safety "ib" according to EN 50020
Table 3: Types of protection of primary head.
Encapsulation "m" according to EN 50028
1.3 IFC 040-EEx signal converter
The IFC 040-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 IP65 conform to EN 60529.
1.3.1 Electronics compartment
The electronics compartment accommodates the pre-certified IFC 040-EEx electronics unit
with approval number PTB 00 ATEX 2213 U. The compartment is designed with type of
protection flameproof enclosure "d" according to EN 50018. It is closed by a flameproof
display cover with glass window.
1.3.2 Terminal compartment
The terminal compartment has seven terminals for connection of the current output (I, I⊥ ),
the additional power supply or "Power Booster" (1L=, 0L=) and binary pulse/status outputs
(B1, B⊥ , B2). Chapter 2 shows the terminal arrangement of the IFC 040-EEx. There are two
versions possible with a different explosion protection according to the European Standards,
which is dependent on the safety-technical maximum voltage Um of the mains power supply
system to which the flowmeter is connected.
Version A: Terminal compartment in type of protection "EEx de [ib]" with Um = 60 V.
The connections of the output circuits can be ordered by the customer in one of the following
types of explosion protection:
• EEx [ib] (intrinsic safety, category "ib") or
• EEx e (increased safety) or
• EEx d (flameproof enclosure).
Version B: Terminal compartment in type of protection "EEx de" with Um = 250 V.
The customer can order the connections of the output circuits in one of the following types of
explosion protection:
• EEx e (increased safety) or
• EEx d (flameproof enclosure).
The two versions (A and B) of the terminal compartment as well as their requirements are
described in more detail in section 2.1 of these additional instructions.
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1.3.3 Cable or conduit entries
⊥
⊥
Dependent on the explosion protection type that the terminal compartment is configured with,
(see description on the previous page), can the terminal compartment be equipped with
cable entries or conduit adapters. The used cable entries (glands and/or blind plugs) must
have a ATEX approval in accordance with the type of protection of the terminal compartment.
Type of protection Intrinsic Safety category "ib" is only applicable for mains power supply
systems with a maximum voltage of Um = 60 V. In this case "EEx ib" approved cable entries
must be used, which are marked by a blue color.
The cable entry holes can be provided with a screw-thread size of Pg13.5, Pg16 or M20x1.5.
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.
ATEX approved "EEx d" cable glands, screw-threaded adapters as well as blind plugs are no
integral part of the delivery package and must be purchased by the customer himself or can
be ordered through their (local) Krohne representative as special parts !
2. ELECTRICAL CONNECTION
To connect external devices to the signal output terminals, the wiring requirements for the
type of protection of the compartment must also be conform to the international or national
standard involved (e.g. EN 60079-14). The terminal arrangement is shown by figure 1 below.
I
I B1 B
B2 1L= 0L=
CURRENT BINARY
OUTPUT OUTPUTS
PE (Protective Earth) terminal
Figure 1: Terminal arrangement in terminal compartment.
The following outputs are available for connection to external circuits (see figure above):
• Current output (terminals I, I⊥ )
This circuit constitutes a passive 4-20 mA current loop and includes the HART protocol of
the communication device (the polarity is free to choice).
• Additional power supply (terminals 1L=, 0L=)
These terminals are connected to provide the 2x2 wire mode (choice of polarity is free).
• Binary outputs (terminals B1, B⊥ , B2)
Terminals B1 and B⊥ can be configured as pulse or status output through software.
Terminals B2 and B⊥ can be configured as pulse or status output to NAMUR.
4
Galvanical separation of circuits:
• The internal electrode circuit with type of protection "EEx ib" is galvanically connected to
the aluminum signal converter housing (i.e. PE potential).
• The current output, the additional power supply and the internal field current circuit are
galvanically connected to each other.
2.1 Detailed description of the output circuits
The terminal compartment of the IFM 4042 K-EEx is, with respect to the explosion protection,
available in two versions. The version can be identified by the information that is listed on the
data plate, which is mounted on the signal converter housing.
Version A: Terminal compartment in "EEx de [ib]" with Um = 60 V.
The customer can decide in which type of explosion protection the output circuits - current
output, additional power supply and binary outputs (i.e. pulse and/or status outputs) - can be
driven; in type of protection "EEx ib", "EEx e" or "EEx d".
The safety-technical maximum voltage Um (maximum effective AC or DC voltage) of the
mains power supply system for the terminal compartment in type of protection EEx de [ib] is
restricted to 60 V. With this maximum voltage it is guaranteed that the protective components
on which the intrinsic safety of these circuits depends are not overloaded. This condition is
met if the mains power supply system satisfies the PELV requirements in accordance with
IEC 364 / IEC 536.
RESTRICTION !
• It is not allowed to mix two different types of protection (e.g. current output in
type of protection "EEx ib" and pulse/status outputs in "EEx e" or "EEx d").
Version B: Terminal compartment in "EEx de" with Um = 250 V.
This version is intended for applications were the mains power supply system provides a
maximum safety-technical voltage of Um = 250 V. The terminals can either be provided with
type of protection increased safety "EEx e" according to EN 50019 or flameproof enclosure
"EEx d" conform to EN 50018. Type of protection intrinsical safety "EEx ib" is not allowed for
this version.
IMPORTANT NOTES (applicable for both versions)
• The intrinsically safe "EEx ib" internal electrode circuit is supplied by the IFC 040-EEx
signal converter electronics unit inside the electronics compartment. This circuit is
separated from all other circuits up to a maximum voltage of Um = 250 V according to En
50020. The internal electrode circuit with type of protection intrinsic safety "ib" is
galvanically connected with the PE (housing potential).
• The IFM 4042 K-EEx compact flowmeter must be incorporated within the equipotential
bonding system of the installation in the hazardous area in accordance with the standard
EN 60079-14. Therefore the internal or external M5 clamp terminal (i.e. PE) must be used.
Disconnection of the equipotential bonding system is only allowed when the flowmeter is
not energized.
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