KROHNE H250-M8 User Manual

Handbook

H250

H250H250

Variable area flowmeter

HandbookHandbook

: IMPRINT :::::::::::::::::::::::::::::::::::::::

Subject to change without notice.

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H250

CONTENTS

1 Safety instructions 5

1.1 Intended use ..................................................................................................................... 5

1.2 Certifications .................................................................................................................... 5

1.3 Safety instructions from the manufacturer ..................................................................... 6

1.3.1 Copyright and data protection ................................................................................................ 6

1.3.2 Disclaimer ............................................................................................................................... 6

1.3.3 Product liability and warranty ................................................................................................ 7

1.3.4 Information concerning the documentation........................................................................... 7

1.3.5 Warnings and symbols used................................................................................................... 8

1.4 Safety instructions for the operator................................................................................. 8

2 Device description 9

2.1 Scope of delivery............................................................................................................... 9

2.2 Device version................................................................................................................. 10

2.2.1 Float damping ....................................................................................................................... 12

2.2.2 Pointer damping.................................................................................................................... 12

2.3 Nameplate ...................................................................................................................... 13

2.4 Description code............................................................................................................. 14

3 Installation 15

3.1 Notes on installation ......................................................................................................15

3.2 Storage ........................................................................................................................... 15

3.3 Installation conditions ....................................................................................................16

3.3.1 Tightening torques................................................................................................................ 17

3.3.2 Magnetic filters ..................................................................................................................... 18

3.3.3 Heat insulation ...................................................................................................................... 19

4 Electrical connections 20

4.1 Safety instructions.......................................................................................................... 20

4.2 Electrical connection indicator M8................................................................................. 21

4.2.1 Indicator M8M - limit switches ............................................................................................. 21

4.2.2 Indicator M8E - current output............................................................................................. 21

4.3 Electrical connection indicator M9................................................................................. 24

4.3.1 Indicator M9 - limit switches ................................................................................................ 24

4.3.2 Indicator M9 - current output ESK2A ................................................................................... 27

4.3.3 Indicator M9 - Profibus PA (ESK3-PA) ................................................................................. 30

4.3.4 Indicator M9 - totalizer (ESK-Z)............................................................................................ 31

4.4 Electrical connection indicator M10............................................................................... 34

4.4.1 Indicator M10 ........................................................................................................................ 34

4.4.2 Power supply - current output ............................................................................................. 34

4.4.3 Switching outputs B1 and B2................................................................................................ 37

4.4.4 Switching output B2 as a pulse output ................................................................................. 39

4.4.5 Connection reset input R ...................................................................................................... 40

4.5 Grounding connections................................................................................................... 40

4.6 Protection category ........................................................................................................41

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CONTENTS

H250

5 Start-up 42

5.1 Standard device .............................................................................................................. 42

5.2 Indicator M10 .................................................................................................................. 42

6 Operation 43

6.1 Operating elements........................................................................................................ 43

6.2 Basic principles of operation.......................................................................................... 44

6.2.1 Functional description of the keys........................................................................................ 44

6.2.2 Navigation within the menu structure.................................................................................. 44

6.2.3 Changing the settings in the menu....................................................................................... 45

6.2.4 Measures in the event of faulty indications.......................................................................... 45

6.3 Overview of the most important functions and indicators............................................. 46

6.4 Error messages.............................................................................................................. 47

6.5 Menu indicator M10 ........................................................................................................ 49

6.5.1 Factory settings .................................................................................................................... 49

6.5.2 Menu structure ..................................................................................................................... 50

6.5.3 Menu explanations................................................................................................................ 51

7 Service 55

7.1 Maintenance ................................................................................................................... 55

7.2 Replacement and retrofitting......................................................................................... 55

7.2.1 Replacing floats .................................................................................................................... 55

7.2.2 Retrofitting float damping..................................................................................................... 56

7.2.3 Retrofitting pointer damping ................................................................................................56

7.2.4 Retrofitting limit switch ........................................................................................................ 57

7.2.5 Replacement - Retrofitting ESK2A ....................................................................................... 58

7.2.6 Totalizer ................................................................................................................................ 59

7.3 Spare parts availability...................................................................................................60

7.3.1 List of spare parts................................................................................................................. 60

7.4 Availability of services .................................................................................................... 62

7.5 Returning the device to the manufacturer..................................................................... 62

7.5.1 General information.............................................................................................................. 62

7.5.2 Form (for copying) to accompany a returned device............................................................ 63

7.6 Disposal .......................................................................................................................... 63

8 Technical data 64

8.1 Operating principle......................................................................................................... 64

8.2 Technical data................................................................................................................. 65

8.3 Dimensions and weights ................................................................................................ 76

8.4 Measuring ranges...........................................................................................................80

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H250

1.1 Intended use

The variable area flowmeters are suitable for measuring gases, vapours and liquids.

The devices are particularly suitable for the measurement of:

• Water

• Hydrocarbons

• Corrosion protection agents and lubricants

• Chemicals and additives

• Solvents

• Superheated steam

• Food, beverages and tobacco

• Air

• Industrial gases

DANGER!

For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation.

SAFETY INSTRUCTIONS 1

WARNING!

The operator himself bears the sole responsibility for the intended use of the device regarding the suitability and the corrosion resistance of the used materials against the measured fluid. The manufacturer is not liable for any damage resulting from improper use or use for other than the intended purpose. Do not use any abrasive media containing solid particles or highly viscous media.

1.2 Certifications

CE marking

The device fulfils all applicable statutory requirements of the following EC directives:

• Pressure Equipment Directive 97/23/EC

• For devices with electrical installations: EMC Directive 2004/108/EC

• Devices for use in hazardous areas: ATEX Directive 94/9/EC

as well as

• NAMUR recommendations NE 21 and NE 43

The manufacturer certifies successful testing of the product by applying the CE marking.

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1 SAFETY INSTRUCTIONS

1.3 Safety instructions from the manufacturer

1.3.1 Copyright and data protection

The contents of this document have been created with great care. Nevertheless, we provide no guarantee that the contents are correct, complete or up-to-date.

The contents and works in this document are subject to copyright. Contributions from third parties are identified as such. Reproduction, processing, dissemination and any type of use beyond what is permitted under copyright requires written authorisation from the respective author and/or the manufacturer.

The manufacturer tries always to observe the copyrights of others, and to draw on works created in-house or works in the public domain.

The collection of personal data (such as names, street addresses or e-mail addresses) in the manufacturer's documents is always on a voluntary basis whenever possible. Whenever feasible, it is always possible to make use of the offerings and services without providing any personal data.

H250

We draw your attention to the fact that data transmission over the Internet (e.g. when communicating by e-mail) may involve gaps in security. It is not possible to protect such data completely against access by third parties.

We hereby expressly prohibit the use of the contact data published as part of our duty to publish an imprint for the purpose of sending us any advertising or informational materials that we have not expressly requested.

1.3.2 Disclaimer

The manufacturer will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect or incidental and consequential damages.

This disclaimer does not apply in case the manufacturer has acted on purpose or with gross negligence. In the event any applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain damages, you may, if such law applies to you, not be subject to some or all of the above disclaimer, exclusions or limitations.

Any product purchased from the manufacturer is warranted in accordance with the relevant product documentation and our Terms and Conditions of Sale.

The manufacturer reserves the right to alter the content of its documents, including this disclaimer in any way, at any time, for any reason, without prior notification, and will not be liable in any way for possible consequences of such changes.

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H250

1.3.3 Product liability and warranty

The operator shall bear responsibility for the suitability of the device for the specific purpose. The manufacturer accepts no liability for the consequences of misuse by the operator. Improper installation and operation of the devices (systems) will cause the warranty to be void. The respective "Standard Terms and Conditions" which form the basis for the sales contract shall also apply.

1.3.4 Information concerning the documentation

To prevent any injury to the user or damage to the device it is essential that you read the information in this document and observe applicable national standards, safety requirements and accident prevention regulations.

If this document is not in your native language and if you have any problems understanding the text, we advise you to contact your local office for assistance. The manufacturer can not accept responsibility for any damage or injury caused by misunderstanding of the information in this document.

This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device. Special considerations and precautions are also described in the document, which appear in the form of underneath icons.

SAFETY INSTRUCTIONS 1

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1 SAFETY INSTRUCTIONS

1.3.5 Warnings and symbols used

Safety warnings are indicated by the following symbols.

DANGER!

This information refers to the immediate danger when working with electricity.

DANGER!

This warning refers to the immediate danger of burns caused by heat or hot surfaces.

DANGER!

This warning refers to the immediate danger when using this device in a hazardous atmosphere.

DANGER!

These warnings must be observed without fail. Even partial disregard of this warning can lead to serious health problems and even death. There is also the risk of seriously damaging the device or parts of the operator's plant.

H250

WARNING!

Disregarding this safety warning, even if only in part, poses the risk of serious health problems. There is also the risk of damaging the device or parts of the operator's plant.

CAUTION!

Disregarding these instructions can result in damage to the device or to parts of the operator's plant.

INFORMATION!

These instructions contain important information for the handling of the device.

LEGAL NOTICE!

This note contains information on statutory directives and standards.

• HANDLING

HANDLING

HANDLINGHANDLING

This symbol designates all instructions for actions to be carried out by the operator in the specified sequence.

i RESULT

RESULT

RESULTRESULT This symbol refers to all important consequences of the previous actions.

1.4 Safety instructions for the operator

WARNING!

In general, devices from the manufacturer may only be installed, commissioned, operated and maintained by properly trained and authorized personnel. This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device.

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H250

2.1 Scope of delivery

INFORMATION!

Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Check the packing list to check if you received completely all that you ordered.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

DEVICE DESCRIPTION 2

Figure 2-1: Scope of delivery

1 Measuring device in ordered version 2 For indicator M10 - bar magnet 3 For indicator M10 - key 4 Documentation 5 Certificates, calibration report (supplied to order only)

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2 DEVICE DESCRIPTION

2.2 Device version

• H250 with indicator M9

• H250 with indicator M10

• H250 with indicator M8

H250

Figure 2-2: Versions M9 and M10

1 H250/RR/M9

• Local indication without auxiliary power supply

• max. 2 limit switches, type NAMUR, NAMUR safety-oriented or transistor (3-wire)

• 2-wire current output 4…20 mA, HART

or Profibus-PA communication

• 6-digit flow counter (non Ex)

• Limit switches and signal output - optional intrinsically safe

2 H250/RR/M10

• Explosion proof enclosure

• 2 digital adjustable limit switches, 2-wire open collector or type NAMUR

• 2-wire current output 4…20 mA, HART

• Pulse output up to 10 Hz (also for electro-mechanical counters)

• 12-digit flow counter with external resetting (batch operation)

The following designs are available as options:

• H250 with indicator M9 as high-temperature version HT

• H250 with indicator M9 with added impact and corrosion protection (special paint finish)

• H250 with indicator M9 in Stainless Steel housing

communication

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H250

Figure 2-3: Version M8

1 H250/RR/M8EG

• Electronic bar graph indicator

• 2-wire current output 4…20 mA, HART

communication

DEVICE DESCRIPTION 2

2 H250/RR/M8MG

• Local indication without auxiliary power supply

• 2 limit switches, 2-wire, type NAMUR or NAMUR safety-oriented

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2 DEVICE DESCRIPTION

2.2.1 Float damping

Float damping is characterised by high standstill times and self-centering. The damping sleeve is made of high performance ceramic or PEEK, depending on the medium and the application. Float damping can also be retrofitted for the user (see Service).

Use of damping

• Generally when CIV and DIV floats are used for gas measurement.

• For TIV floats (H250/RR and H250/HC only) with an operating primary pressure:

Nominal size acc. to Operating primary pressure

EN 1092-1 ASME B16.5 [bar] [psig]

DN 50 ½" ≤0.3 ≤4.4

DN25 1" ≤0.3 ≤4.4 DN50 2" ≤0.2 ≤2.9 DN80 3" ≤0.2 ≤2.9

DN 100 4" ≤0.2 ≤2.9

H250

2.2.2 Pointer damping

The pointer system with its magnetic system basically contains pointer damping. An additional eddy current brake is advantageous for fluctuating or pulsing flows. The eddy current brake magnets surround the pointer vane 1 without touching it, damping its movement. The result is a pointer position that is considerably calmer, and no distortion of the measured value. A clamp screw holds it in place securely. The eddy current brake can be retrofitted without having to recalibrate and while in operation (see Service).

1 Eddy current brake 2 Pointer vane 3 Bracket 4 Pointer cylinder

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H250

2.3 Nameplate

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

DEVICE DESCRIPTION 2

Figure 2-4: Nameplates on the indicator

1 Device type 2 Manufacturer 3 Notified ATEX & PED body 4 Rating data: temperature & pressure rating 5 PED data 6 Ex data 7 Electrical connection data 8 Internet site

Additional markings on the indicator

• SN - serial number

• SO - sales order / item

• PA - order

• Vx - product configurator code

• AC - article code

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2 DEVICE DESCRIPTION

2.4 Description code

The description code* consists of the following elements:

1 Device type H250 - standard version H250H - horizontal flow direction H250U - flow direction from top to bottom

2 Materials / versions RR - Stainless Steel C - PTFE or PTFE/ceramics HC - Hastelloy Ti - Titanium F - aseptic version (food)

3 Heating jacket version B - with heating jacket

H250

4 Series of indicators M8 - Indicator M8 M9 - Indicator M9 standard indicator M9S - Indicator with added impact and corrosion protection M9R - Indicator in Stainless Steel housing M10 - Indicator or signal converter M10

5 Design of indicator M8 MG - Mechanical indicator EG - Electronic indicator with signal output 4...20 mA

6 High-temperature version HT - Version with HT extension

7 Electrical signal output ESK - Current output or Profibus-PA ESK-Z - Current output and totalizer

8 Limit switch K1 - One limit switch K2 - Two limit switches S1 - One SIL2 Limit switch acc. to IEC 61508 S2 - Two SIL2 Limit switches acc. to IEC 61508

9 Explosion protection Ex - Explosion-protected equipment

10 SIL SK - SIL2 compliance of limit switches acc. to IEC 61508

* positions which are not needed are omitted (no blank positions)

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H250

3.1 Notes on installation

INFORMATION!

Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Check the packing list to check if you received completely all that you ordered.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

3.2 Storage

• Store the device in a dry and dust-free location.

• Avoid lasting direct exposure to the sun.

• Store the device in its original packing.

• The permissible storage temperature for standard devices is -40...+80°C / -40...+176°F.

INSTALLATION 3

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3 INSTALLATION

3.3 Installation conditions

CAUTION!

When installing the device in the piping, the following points must be observed:

•

The variable area flowmeter must be installed vertically (measuring principle). Flow direction from bottom to top. For installation recommendations please refer also to VDI/VDE 3513 Sheet 3.

H250Hs are installed horizontally and H250U devices are installed vertically with the flow direction from top to bottom.

•

A straight unimpeded inlet run of ≥ 5x DN upstream of the device and a straight outlet run of ≥ 3x DN downstream of the device are recommended.

•

Screws, bolts and gaskets are to be provided by the customer and must be selected in accordance with the pressure rating of the connection or the operating pressure.

•

The inside diameter of the flange deviates from the standard dimensions. Flange seal standard DIN 2690 can be applied without any limitation.

•

Align the gaskets. Tighten the nuts with the tightening torques of the appropriate pressure rating.

For devices with PTFE liner or ceramic liner and PTFE raised faces, see chapter "Tightening torques".

•

Control devices are to be positioned downstream of the measuring device.

•

Shutoff devices are preferably to be positioned upstream of the measuring device.

•

Before connecting, blow or flush out the pipes leading to the device.

•

Pipes for gas flow need to be dried before the device is installed.

•

Use connectors suitable for the particular device version.

•

Align the pipes axially with the connections on the measuring device so they are free of stresses.

•

If necessary, the piping has to be supported to prevent vibrations being transmitted to the measuring device.

•

Do not lay signal cables directly next to cables for the power supply.

H250

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H250

INSTALLATION 3

Take special note of the installation position for the H250H with horizontal flow direction:

In order to comply with thermal parameters and measuring accuracy, H250H flowmeters for horizontal installation are to be installed in the pipeline so that the display is located on the side of the measuring tube. The maximum medium and ambient temperatures indicated as well as the measuring accuracy are based on lateral installation of the display.

3.3.1 Tightening torques

For measuring devices with PTFE liner or ceramic liner and PTFE raised face, tighten the flange threads with the following torques:

Nominal size acc. to Bolts Max. torque

EN 1092-1 ASME B16.5 EN

DN PN Inches lb 150 lb 300 lb Nm ft*lbf Nm ft*lbf

15 40 ½" 150/300 4 x M 12 4 x ½" 4 x ½" 9.8 7.1 5.2 3.8 25 40 1" 150/300 4 x M 12 4 x ½" 4 x 5/8" 21 15 10 7.2

50 40 2" 150/300 4 x M 16 4 x 5/8" 8 x 5/8" 57 41 41 30 80 16 3" 150/300 8 x M 16 4 x 5/8" 8 x ¾" 47 34 70 51

100 16 4" 150/300 8 x M 16 8 x 5/8" 8 x ¾" 67 48 50 36

ASME EN 1092-1 ASME 150 lb

1092-1

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3 INSTALLATION

3.3.2 Magnetic filters

The use of magnetic filters is recommended when the medium contains particles which can be influenced magnetically. The magnetic filter is to be installed in the flow direction upstream of the flowmeter. Bar magnets are positioned helically in the filter to provide optimal efficiency at low pressure loss. All of the magnets are coated individually with PTFE to protect against corrosion. Material: 1.4571

Magnetic filters

H250

1 Type F - fitting part with flange - overall length 100 mm 2 Type FS - fitting part without flange - overall length 50 mm

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H250

3.3.3 Heat insulation

CAUTION!

The indicator housing may not be heat-insulated. The heat insulation 3 may only reach as far as the housing fastening 4.

Figure 3-1: H250 heat insulation

1 Standard indicator M9 2 Indicator with HT extension

INSTALLATION 3

This applies in the same manner to indicators M8 and M10.

CAUTION!

The heat insulation 1 may only reach to the rear of the housing 2. The area of the cable entries 3 must be freely accessible.

Figure 3-2: Insulation - cross section

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4 ELECTRICAL CONNECTIONS

4.1 Safety instructions

DANGER!

All work on the electrical connections may only be carried out with the power disconnected. Take note of the voltage data on the nameplate!

DANGER!

Observe the national regulations for electrical installations!

DANGER!

For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation.

WARNING!

Observe without fail the local occupational health and safety regulations. Any work done on the electrical components of the measuring device may only be carried out by properly trained specialists.

H250

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

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H250

4.2 Electrical connection indicator M8

4.2.1 Indicator M8M - limit switches

The limit switches can be set over the entire measuring range using the limit pointer 1. The set limit values are displayed on the scale. The pointers are set to the desired limit values using a slip coupling along the scale.

ELECTRICAL CONNECTIONS 4

Figure 4-1: Limit switch settings M8MG

1 Maximum pointer, switching point indicator 2 Limit switch 3 Connection board 4 Connection terminal

4.2.2 Indicator M8E - current output

Figure 4-2: Electrical connection M8EG

1 Terminal connection 2 Power supply 14.8...30 VDC 3 Measuring signal 4...20 mA

4 External load, HART

communication

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4 ELECTRICAL CONNECTIONS

Power supply M8 with electrical isolation

The circuitry for connection to other devices such as digital evaluator units or process control equipment must be designed with especial care. In some circumstances internal connections in these devices (e.g. GND with PE, ground loops) may lead to impermissible voltage potentials, which can compromise the function of the device itself or a connected device. In such cases a protected extra-low voltage (PELV) is recommended.

H250

Figure 4-3: Electrical connection M8EG with electrical isolation

1 Terminal connection 2 Converter supply isolator with electrical isolation 3 Power supply (see supply isolator information) 4 Measuring signal 4...20 mA

5 External load, HART

communication

Power supply

INFORMATION!

The supply voltage has to be between 14.8 VDC and 30 VDC. This is based on the total resistance of the measuring loop. To determine this, add up the resistances of each component in the measuring loop (not including the device).

The required supply voltage can be calculated using the formula below:

= R

ext.

22 mA + 14.8 V

where U

= the minimum supply voltage and

ext.

= the total measuring loop resistance is.

INFORMATION!

The power supply has to be able to supply a minimum of 22 mA.

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H250

ELECTRICAL CONNECTIONS 4

HART® communication

When HART® communication is carried out with the M8E display, the analogue measured data transmission (4...20 mA) is not impaired in any way.

Exception for multidrop mode. In multidrop mode, a maximum of 15 devices with HART can be operated in parallel, whereby their current outputs are switched inactive (I approx. 4 mA per device).

Load for HART® communication

INFORMATION!

For HART

The maximum load resistance is calculated as follows:

communication a load of at least 230 ohm is required.

function

DANGER!

Use a twisted two-core cable to prevent electrical interference from impeding the DC output signal. In some cases a shielded cable may be necessary. The cable shield may only be earthed (grounded) at one place (on the power supply unit).

Configuration

The M8E electronic indicator can be configured via HART® communication. DD (Device Descriptions) for AMS 6.x and PDM 5.2 as well as a DTM (Device Type Manager) are available for configuration. They can be downloaded free of charge from our website.

The current flow rate can be transmitted using the integrated HART counter can be configured. Two limit values can be set and monitored. The limit values are assigned either to flow values or to the counter overflow. The limit values are not depicted on the display.

communication. A flow

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4 ELECTRICAL CONNECTIONS

4.3 Electrical connection indicator M9

4.3.1 Indicator M9 - limit switches

The M9 indicator can be equipped with a maximum of two electronic limit switches. The limit switch functions as a slot sensor which is operated inductively through the semicircular metal vane belonging to the measuring pointer. The switching points are set using the contact pointers. The position of the contact pointer is indicated on the scale.

Limit switch module

H250

1 Min. contact 2 Max. contact 3 Locking screw 4 Maximum pointer 5 Connection terminal

The connecting terminals have a pluggable design and can be removed in order to connect the cables. The built-in limit switch types are shown on the indicator.

Electrical connection of the limit switches

Contact MIN MAX

Terminal no. 1 2 3 4 5 6

Connection 2-wire NAMUR - + - +

Connection 3-wire + - + -

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H250

ELECTRICAL CONNECTIONS 4

Limit switch connection terminals

1 2-wire limit switch NAMUR 2 3-wire limit switch 3 Terminal connection min contact 4 Terminal connection max contact 5 3-wire load 6 NAMUR isolated switching amplifier 7 3-wire power supply

Limit setting

Figure 4-4: Limit switch settings

1 Contact pointer MAX 2 Contact pointer MIN 3 Locking screw

Setting is carried out directly via contact pointers 1 and 2:

• Slide the scale away

• Loosen the locking screw 3 slightly

• Slide the scale back to the latching point

• Set contact pointers 1 and 2 to the desired switching point

After setting has been carried out: Fix the contact pointers with the locking screw 3.

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4 ELECTRICAL CONNECTIONS

Switch contact definition

1 MIN contact 2 MAX contact 3 Pointer vane with switching vane

If the pointer vane enters the slot, an alarm is triggered. If the pointer vane lies outside the slot sensor, a wire break also causes the alarm to be triggered.

The 3-wire limit switch does not have any wire break detection.

Definition MinMin - MaxMax

H250

1 MIN 2 contact or MAX 1 contact 2 MIN 1 contact or MAX 2 contact

Current consumption in the position shown:

Contact Type Current

MIN 1 NAMUR ≤ 1 mA MIN 2 NAMUR ≤ 1 mA MAX 1 NAMUR ≥ 3 mA MAX 2 NAMUR ≥ 3 mA

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H250

4.3.2 Indicator M9 - current output ESK2A

The connecting terminals of the ESK2A have a pluggable design and can be removed in order to connect the cables.

1 ESK2A current transmitter 2 Power supply 12...30VDC 3 Measurement signal 4...20 mA

4 External load, HART

communication

ELECTRICAL CONNECTIONS 4

Power supply M9 with electrical isolation

1 Terminal connection 2 Converter supply isolator with electrical isolation 3 Power supply (see supply isolator information) 4 Measurement signal 4...20mA

5 External load, HART

communication

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