Kobold Heinrichs UMC3 User manual

Heinrichs Messtechnik GmbH
EX-Betriebsanleitung UMC3-TMx
Januar 2021
Coriolis Mass Flow Meter
UMC3 with
TM, TME,
TMU, TMR
TM-SH
Supplementary Operating Manual for
explosion-proof flow meters
This operating manual contains important information for the operation in potentially explosive atmospheres
Please read the instructions carefully and store them in a safe place for future reference

Heinrichs Messtechnik GmbH
Page 2 of 37
Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
CONTENTS
INTRODUCTION............................................................................................................................................... 4
I. Shipping and storage; product inspection............................................................................................................................ 4
II. Warranty......................................................................................................................................................................................... 4
III. Validity of this operating manual ............................................................................................................................................ 4
IV. Repairs and hazardous materials ........................................................................................................................................... 4
1. STEPS PRIOR TO OPERATION......................................................................................................... 5
1.1 Installation, mounting, commissioning and maintenance............................................................................................... 5
1.2 Hazard warnings .......................................................................................................................................................................... 6
1.3 Proper use of the device ............................................................................................................................................................ 6
2. IDENTIFICATION .................................................................................................................................. 7
3. GENERAL INFORMATION ABOUT EXPLOSION PROTECTION ................................................ 8
4. CORIOLIS MASS FLOW METER ....................................................................................................... 9
4.1 Description of the TM, TME, TMU and TMR sensors ........................................................................................................ 9
4.1.1 Device identification...................................................................................................................................................... 9
4.1.2 Mounting ........................................................................................................................................................................10
4.1.2.1 Thermally insulated sensor .............................................................................................................................10
4.1.2.2 Heated sensor......................................................................................................................................................10
4.1.2.3 Connection sensor –transmitter...................................................................................................................10
4.1.3 EC Type-Examination Certificate for the sensors type TM, TME, TMU, TMR and TM-SH.....................11
4.1.3.1 Sensor Parameters ............................................................................................................................................12
4.1.3.2 TMx Sensor temperature ranges ...................................................................................................................13
4.2 Description of the UMC3 transmitter ..................................................................................................................................14
4.2.1 Device identification....................................................................................................................................................14
4.2.2 Ignition category of the transmitter.......................................................................................................................15
4.2.2.1 Marking when equipped with Ex e or Ex d terminal compartments ...................................................15
4.2.3 Terminal compartment ..............................................................................................................................................15
4.2.3.1 Ex e i type of protection terminal compartment.......................................................................................15
4.2.3.2 Ex d and Ex d / Ex i type of protection terminal compartment .............................................................15
4.2.3.3 Equipotential bonding .......................................................................................................................................16
4.2.4 Connecting cables........................................................................................................................................................16
4.2.4.1 Sensor circuits......................................................................................................................................................16
4.2.5 Parameters for the UMC3 transmitter ..................................................................................................................17
4.2.5.1 Power circuit (terminals L, N and PE)............................................................................................................17
4.2.5.2 Non-intrinsically safe circuits for Type UMC3-*****2 .............................................................................17
4.2.5.3 Type of protection Ex ia II sensor circuits ....................................................................................................17
4.2.5.4 Signal output circuits .........................................................................................................................................18
4.2.5.5 Bus Communication circuits ............................................................................................................................20

Heinrichs Messtechnik GmbH
Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 3 of 37
4.2.6 UMC3 Ambient Temperature Ranges ....................................................................................................................21
4.2.6.1 Standard temperature ranges.........................................................................................................................21
4.2.6.2 Extended ambient temperature range .........................................................................................................22
4.3 The Control Unit BE2.................................................................................................................................................................23
4.3.1 Connection of the converter during commissioning..........................................................................................23
4.3.2 Procedure for Configuration......................................................................................................................................24
5. INSTALLATION AND COMMISSIONING....................................................................................... 25
5.1 Special conditions for safe use for the UMC3....................................................................................................................25
5.2 General conditions for safe operation..................................................................................................................................25
5.3 Requirements for installation in all environments...........................................................................................................26
5.4 Ex relevant screw and bolt torques ......................................................................................................................................26
6. MAINTENANCE AND REPAIR WORK........................................................................................... 27
6.1 Definition of terms according to IEC 60079-17: ...............................................................................................................27
6.2 Recommended inspection intervals .....................................................................................................................................27
7. WARNING NOTICES.......................................................................................................................... 28
8. MODEL CODES .................................................................................................................................. 29
8.1 The Transmitter UMC3 .............................................................................................................................................................29
8.2 The TM Sensor ............................................................................................................................................................................30
8.3 The TMU Sensor .........................................................................................................................................................................31
8.4 The TME Sensor..........................................................................................................................................................................32
8.5 The TMR Sensor .........................................................................................................................................................................33
8.6 The TM-SH Sensor.....................................................................................................................................................................34
9. EC DECLARATION OF CONFORMITY ........................................................................................... 35

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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Introduction
I. Shipping and storage; product inspection
The device is to be safeguarded against moisture, dirt, impact and damage.
Product inspection
Upon receipt of the product, the consignment should be checked for completeness. The data of the device have
to be compared with the packing slip and the order documents
Notify us of any shipping damage immediately upon receipt of the product. Any damage claim received at a later
time will not be honored.
II. Warranty
Your flow meter was manufactured in accordance with the highest quality standards and was thoroughly tested
prior to shipment. However, in the event any problem arises with your device, we will be happy to resolve the
problem for you as quickly as possible under the terms of the warranty which can be found in the terms and
conditions of delivery. Your warranty will only be honored if the device was installed and operated in accordance
with the instructions for your device. Any mounting, commissioning and/or maintenance work is to be carried
out by qualified and authorized technicians only.
III. Validity of this operating manual
Note! The present instructions apply to explosion-proof Coriolis flow meters
TM/TME/TMU/TMR and TM-SH series which are operated in conjunction with the UMC3
transmitter as of year of construction October 2018 or later.
These instructions are supplementary operating manual for non-explosion proof Coriolis flow
meters. If you do not have a copy of the latter instructions, please request one from Heinrichs Messtechnik
GmbH or download the instructions from our website.
The instructions herein pertain primarily to explosion proof Coriolis flow meters. The technical data in the
mounting and operating instructions for non-explosion proof Coriolis flow meters still apply insofar as the
present instructions do not replace them or exclude their application.
IV. Repairs and hazardous materials
It is important that you do the following before shipping your flow meter to Heinrichs Messtechnik GmbH for
repair:
Enclose a description of the problem with your device. Describe in as much detail as possible the application
and the physical and chemical properties of the fluid.
Remove any residues from the device and be sure to clean the seal grooves and recesses thoroughly. This
is particularly important if the fluid is corrosive, toxic, carcinogenic, radioactive or otherwise hazardous.
The operator is liable for any substance removal or personal damage costs arising from inadequate cleaning of a
device that is sent for repair.

Heinrichs Messtechnik GmbH
Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 5 of 37
1. Steps prior to operation
Prior to installation and operation, it is essential that the operator familiarizes himself
with all of the instructions and information contained in the manual for non-explosion
proof Coriolis flow meters as well as the present instructions. If any part of either manual
is missing, contact Heinrichs Messtechnik GmbH to request a new manual. These
manuals can also be downloaded from our website.
The UMC3 transmitter described herein is only to be used to measure mass and volume
flow, as well as liquid and gas density and temperature, in conjunction with a Heinrichs Messtechnik GmbH TM,
TME, TMU, TMR or TM-SH sensor.
1.1 Installation, mounting, commissioning and maintenance
Installation, mounting, commissioning and maintenance are to be performed by a technician trained to work
with explosion-proof devices, or by a Heinrichs Messtechnik service technician.
Warning
Any maintenance or repair that safety relevant in terms of explosion-protection is to be
carried out by the manufacturer, an authorized Heinrichs
Heinrichs Messtechnik GmbH accepts no liability for any loss or damage of any kind arising from improper
operation of any product, improper handling or use of any replacement part, or from external electrical or
mechanical effects, overvoltage or lightning. Any such improper operation, use or handling shall
automatically invalidate the warranty for the product concerned.
In the event of a problem please contact the service center of Heinrichs Messtechnik:
Phone: [phone]
Fax: [phone]
Contact our customer service department if your device needs repair or if you need assistance in diagnosing a
problem with your device.

Heinrichs Messtechnik GmbH
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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
1.2 Hazard warnings
The purpose of the hazard warnings listed below is to ensure that device operators and maintenance personnel
are not injured and that the flow meter and any devices connected to it are not damaged.
The safety advisories and hazard warnings in the present document that aim to avoid placing operators and
maintenance personnel at risk and to avoid material damage are prioritized using the terms listed below, which
are defined as follows in regard to the instructions herein and the advisories pertaining to the device itself.
Warning
means that failure to take the prescribed precautions could result in injury, substantial material
damage or even death. Always comply to these warnings and proceed with caution.
Caution
means that failure to take the prescribed precaution could result in material damage or
destruction of the device. We advice always to abide to these instructions!
Note
means that the accompanying text contains important information about the product, handling
the product or about a section of the documentation that is of particular importance.
1.3 Proper use of the device
Warning
The operator is responsible for ensuring that the material used in the sensor and
transmitter housing is suitable and that such material meets the requirements for the fluid
being used and the ambient site conditions. The manufacturer accepts no responsibility in
regard to such material and housing.
Warning
In order for the device to perform correctly and safely, it must be shipped, stored, set up,
mounted operated and maintained properly.

Heinrichs Messtechnik GmbH
Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 7 of 37
2. Identification
Manufacturer:
Heinrichs Messtechnik GmbH
Robert-Perthel-Strasse 9
D-50739 Cologne
Germany
Phone: [phone]
Fax: [phone]
Internet: www.heinrichs.eu
Email: [email protected]
Product type:
Mass flow-rate meter for liquid and gaseous products
Product name:
Sensor type: TM / TMU / TME / TMR / TM-SH
Transmitter type: UMC3
File name:
umc3-tm_ex-ba_21.01_en.doc
Version:.
21.01, dated January 31, 2021

Heinrichs Messtechnik GmbH
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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
3. General information about explosion protection
Acc. Directive 94/9/EC (ATEX)
Example designation
0158
II
2G
Ex
ia
IIC
T6
Gb
Equipment groups
I
Equipment group I applies to equipment intended for use in underground
parts of mines as well as those parts of surface installations of such mines
endangered by firedamp and/or combustible dust.
II
Equipment group II applies to equipment intended for use in other places
liable to be endangered by explosive atmospheres. This group is subdivided
into three categories.
Equipment category
Gas
Dust
Definition
1G
(0)
1 D
(20)
Equipment in this category is intended for use in areas in which
explosive atmospheres caused by mixtures of air and gases,
vapours or mists or by air/dust mixtures are present continuously,
for long periods or frequently.
2 G
(1)
2 D
(21)
Equipment in this category is intended for use in areas in which
explosive atmospheres caused by gases, vapours, mists or air/dust
mixtures are likely to occur.
3G
(2)
3D
(22)
Equipment in this category is intended for use in areas in which
explosive atmospheres caused by gases, vapours, mists, or air/dust
mixtures are unlikely to occur or, if they do occur, are likely to do so
only infrequently and for a short period only.
(The numbers in round brackets correspond to the IEC Zones.)
Acc. EN 60079-0 ff / IEC 60079-0 ff
Ex = Explosion-proof electrical equipment
Types of protection
General requirements
IEC 60079-0
„d“
Flameproof enclosure
IEC 60079-1
„e“
Increased safety
IEC 60079-7
„i“
Intrinsic safety (ia, ib)
IEC 60079-11
„t"
Equipment dust ignition protection by
enclosure "t" (ta, tb or tc)
EN 60079-31
Explosion groups
Gases and vapours
IIA
Acetone, benzene, fuel oil, ethanoic acid
IIB
City gas, ethylene, isoprene
IIC
Acetylene, hydrogen, carbon bisulphide
Dust Atmospheres
IIIA
Fibers and flyings
IIIB
Non-conductive dusts
IIIC
Metal dusts
Temperature classes
Maximum surface temperature
Temperature class
450 °C
842 °F
T1
300 °C
572 °F
T2
200 °C
392 °F
T3
135 °C
275 °F
T4
100 °C
212 °F
T5
85 °C
185 °F
T6
Equipment protection level, EPL
Gases: Ga, Gb oder Gc
Dust: Da, Db or Dc
Explosion protection designations [square brackets] refer to “Related electrical equipment or circuits.”

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Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 9 of 37
4. Coriolis mass flow meter
4.1 Description of the TM, TME, TMU and TMR sensors
The TMU sensor is an “Intrinsic safety” type of protection device that is outfitted with the following four
independent potential-free circuits: These circuits are safely separated in the sensor
Excitation circuit
Sensor circuit 1
Sensor circuit 2
Temperature sensor circuit (PT1000)
If the transmitter is mounted externally, it should be connected to the sensor using a Heinrichs Messtechnik
cable that is specially designed for this purpose.
Although the appearance of the standard and explosion-proof transmitters is identical and their rating plates
contain the same information, under no circumstances should a standard (non-explosion proof) transmitter
be connected to an explosion-proof sensor!
4.1.1 Device identification
The rating plates on Heinrichs Messtechnik flow meters that are suitable for use in potentially explosive
atmospheres are labeled accordingly. Since the sensor and transmitter have different ratings, each device has
its own rating plate.
TM/TME/TMU/TMR/TM-SH rating plate
Example: TM for process temperatures ranging from - 40 °C to 100 °C.

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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
4.1.2 Mounting
The mounting instructions for the standard sensor also apply to the explosion-proof sensor.
4.1.2.1 Thermally insulated sensor
The sensor may be outfitted with thermal insulation, also in explosive atmospheres. However, so not to impair
the junction box or connectors thermal ratings, the insulation shall only cover maximum the half of the sensors
adapter neck onto which the junction box or connector is mounted.
4.1.2.2 Heated sensor
To avoid crystallization in the flow tubes, the sensor can be externally heated. Any heating technique or device
may be used. By use of electrical heating devices, these must be suitable for use in the potentially explosive
environments.
It is the operator’s responsibility to ensure that the heating temperature does not exceed the maximum
allowable temperature for the fluid and/or the maximum allowable temperature range for the potentially
explosive atmosphere in which the device is being operated.
The maximum allowable temperature range for the fluid is indicated on the flow meter rating plate.
It is also the operator’s responsibility to ensure that no hazards are created by hot surfaces pursuant to
EN 1127-1 (Explosive atmospheres - Explosion prevention and protection) paragraphs 5.2 and 6.4.2.
4.1.2.3 Connection sensor –transmitter
Compact meters (sensor and transmitter form a unit and are connected electrically)
The electrical connection is made by the manufacturer. Furthermore the proof of the intrinsic safety of the
sensor circuits (according EN 60079-14) was carried out by the manufacturer and ensured. For these circuits no
action is required by the operator.
Remote installation
A dedicated cable SLI2Y (SP) CY 5 x 2 x 0.5 mm² [blue] is to be used for the electrical connection between
sensor and remote mount transmitter. This cable, which is available from Heinrichs Messtechnik, has five
twisted pairs, each of which has a foil shield and filler cord. The filler cords are to be installed on the “shield”
terminal in both the sensor and transmitter. The five twisted wire pairs are themselves shielded by tinned
copper wire mesh. This external cable shield is connected to the housing via a dedicated EMC cable fitting, thus
ensuring optimum noise immunity.

Heinrichs Messtechnik GmbH
Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 11 of 37
Sensor Cable
Schirm / shield
10
9
8
5
7
6
4
3
2
1
-
-
-
-
-
-
-
-
-
-
rosa / pink
grau / grey
schwarz / black
violett / violett
blau / blue
rot / red
gelb / yellow
grün / green
weiß / white
braun / brown
-
-
-
-
-
-
-
-
-
-
Schirm / shield
10
9
8
5
7
6
4
3
2
1
rosa / pink
grau / grey
schwarz / black
violett / violett
blau / blue
rot / red
gelb / yellow
grün / green
weiß / white
braun / brown
The operator is to comply in all cases with the applicable installation regulations such as EN 60079-14
“Electrical apparatus for explosive gas atmospheres- Part 14: Electrical installations in hazardous areas”.
Applicable guidelines pertaining to the interconnection of intrinsically safe circuits must also be observed.
The following maximum values apply to the cable mentioned above:
CL= 100 pF/m wire to wire
CL= 170 pF/m wire to shield
LL= 700 µH/km wire to wire
LL= 500 µH/km wire to shield
Warning
If a connecting cable other than the Heinrichs Messtechnik cable is used, the intrinsic safety
of the cable is to be validated using the cable’s nominal values
4.1.3 EC Type-Examination Certificate for the sensors type TM, TME, TMU, TMR and TM-SH
The sensors are with the examination certificates
DMT 01 ATEX E 149 X
II 1/2G Ex ia IIC T6-T2 Ga/Gb
IECEx BVS 11.0084 X
Ex ia IIC T6-T2 Ga/Gb
approved for the use in potentially explosive atmospheres. (hazardous classified locations)
The sensor may be used in such a way that inside the measuring tubes explosive atmosphere may be present
often or for a long time (Zone 0).
Warning
In order to comply with the requirements for explosive atmospheres, it is essential that
the maximum electrical and thermal values set forth below are observed and adhered
to.

Heinrichs Messtechnik GmbH
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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
4.1.3.1 Sensor Parameters
Exciter circuit (terminals 9 and 10)
For type EC1
Voltage Ui 30 V
Current Ii 90 mA
Power Pi 0,4 W
Effective internal capacitance Ci negligible
Effective internal inductance Li 4,38 mH
For exciter circuit type EC2 (remote mount transmitter configuration)
For connecting an intrinsically safe circuit with the Ex ia IIC type of protection, with linear output
characteristic and the following maximum values:
Voltage Uo 30 V
Current Io 90 mA
Power Po 0.8 W
Sensor circuits (terminals 1 –2 and 3 - 4)
Voltage Ui DC 30 V
Current Ii 50 mA
Power Pi 0,3 W
Effective internal capacitance Ci negligible
Effective internal inductance Li 14 mH
Output voltage Uo AC 0,3 V
Temperature sensor circuit (terminals 5 to 8)
Voltage Ui DC 30 V
Current Ii 100 mA
Power Pi 0,1 W
Effective internal capacitance Ci negligible
Effective internal inductance Li negligible

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Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 13 of 37
4.1.3.2 TMx Sensor temperature ranges
Depending on type of connection, installation, process temperature and temperature class:
With Connector plug
Adapter
Process temperature
(°C) (1)
Ambient temperature
range (°C) (1)
Temperature class
without
40
-40 to +40
T6
without
60
-40 to +60
T5
without
60
-40 to +10
T4
60 mm
100
-40 to +100
T4
160 mm
120
-40 to +100
T4
160 mm
180
-40 to +100
T3
260 mm
220/260 (2) (3)
-40 to +100
T2
(1) The maximum ambient and process temperatures of the TM-SH are restricted to 60 °C and 100 °C respectively
(2) The maximum process temperature of 260 °C only short-term. Refer to section 3.1 for more details.
(3) The process temperatures 220/260 °C are only applicable for TM, TMU and TMR sensors
Remote mount configuration
Adapter
Process temperature
(°C)
Ambient temperature
range (°C)
Temperature class
without
40
-40 to +40
T6
without
60
-40 to +60
T5
without
100
-40 to +100
T4
100 mm
120
-40 to +100
T4
100 mm
180
-40 to +100
T3
200 mm
220/260 (2) (3)
-40 to +100
T2
(2) The maximum process temperature of 260 °C only short-term. Refer to section 3.1 for more details.
(3) The process temperatures 220/260 °C are only applicable for TM, TMU and TMR sensors
Integral mount configuration
Adapter
Process temperature
(°C)
Ambient temperature
range (°C)
Temperature class
without
40
-40 to +40
T6
without
60
-40 to +55
T5
without
100
-40 to +50
T4
100 mm
120
-40 to +50
T4
100 mm
150
-40 to +50
T3
Refer also to section 4.2.6

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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
4.2 Description of the UMC3 transmitter
When used in conjunction with the sensor, the UMC3transmitter measures the mass flow of liquids and gases
in pipelines. The transmitter can be mounted on the sensor or remote. The configuration can be carried out by
using a built-in or standalone control unit. Thereby a high degree of adaptability to user requirements is
ensured. Although the basic device settings, e.g. calibration data are factory-configured, the settings pertaining
to measurement data output and evaluation are user definable.
The UMC3 drives the excitation of the oscillating system in the mass flow sensor and prepares the sensor
signals (position sensor 1 and 2 and the temperature sensor Pt 1000). As a standard, 2 active analog outputs 4-
20 mA and 2 passive binary outputs are available. (1 pulse or 1 frequency output, 1 status output).Through
current output 1, an additional digital modulated data transmission via HART® is provided.
4.2.1 Device identification
The UMC3 transmitter’s identification plates are depicted in the following examples.
Terminal compartment: “Increased safety” and
Signal outputs: intrinsically save
Terminal compartment: “Flameproof enclosure” and
Signal outputs: not intrinsically save

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Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 15 of 37
4.2.2 Ignition category of the transmitter
The transmitter is mounted in an enclosure containing an internal partition, which is divided into an electronics
compartment and a terminal connection compartment with an Ex-d "flameproof enclosure" type of protection.
The terminal compartment can either be designed with type of protection "d" or "e".
The signal outputs can be designed with intrinsic safety "i" type of protection or as non-intrinsically safe signal
outputs. All signal outputs are either designed to type of protection "i" or as non-intrinsically safe. A mixture of
both is not permitted.
The converter corresponds to category 2 for use in zone 1. The sensor circuits correspond to category 1 "ia" and
can be lad into or through Zone 0.
4.2.2.1 Marking when equipped with Ex e or Ex d terminal compartments
Transmitter with protection type
Marking
Electronic comp.
Flameproof enclosure „d“
II (1)2G Ex d e [ia Ga] IIC/IIB T6..T3 Gb
Terminal comp.
Increased safety „e“
BE2 Control unit
Intrinsically safe „i“
II 2G Ex ia IIC T6 Gb
Electronic comp.
Flameproof enclosure „d“
II (1)2G Ex d [ia Ga] IIC/IIB T6..T3 Gb
Terminal comp.
Flameproof enclosure „d“
BE2 Control unit
Intrinsically safe „i“
II 2G Ex ia IIC T6 Gb
4.2.3 Terminal compartment
The electrical connections for all electrical circuits are realised in the transmitter terminal compartment, which
in all transmitter versions accommodates both intrinsically safe and non-intrinsically safe circuits. The terminal
compartment type of protection (Ex e or Ex d) is indicated on the rating plate. The terminals are covered by the
IP 30 ingress protection BE2 control unit.
4.2.3.1 Ex e i type of protection terminal compartment
The gap between the terminals for intrinsically safe and non-intrinsically safe circuits is greater than 50 mm.
The cable glands and dummy plugs used must comply with an EU type-examination certificate according to
IEC 60079-7. The Ingress protection of the cable glands must be compliant with the relevant housing ingress
protection.
The compartments lid may only be removed for very brief periods for purposes such as the configuring of the
transmitter. When the cover is removed, care should be taken to ensure that no dampness enters the
enclosure.
4.2.3.2 Ex d and Ex d / Ex i type of protection terminal compartment
Connecting cables in a type of protection “Ex d” terminal compartment can be installed in one of the two
following ways (Refer also to IEC 60079-14/10.3.):
They can be fed directly through approved flameproof cable glands.
They can be fed through conduits that are specially designed and approved for this purpose. In this
case, the conduit seals must be installed in the immediate vicinity of the enclosure.

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Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
4.2.3.3 Equipotential bonding
When the sensor is mounted externally (remote mount configuration), equipotential bonding between the
sensor and transmitter is to be realized. Terminals are provided on the outside of the sensor and transmitter for
this purpose.
4.2.4 Connecting cables
The connecting cables for power supply, signal outputs and sensor circuits must adhere to the requirements of
EN 60079-14.
Note
The connecting cables are to be installed in such a way that they are protected against
mechanical damage and unduly high temperatures.
The external diameters of the connecting cables must be compatible with the thickness
range of the cable glands and rubber seals used.
The cables and cable glands used must be compatible with the type of protection of the
junction box being used.
The dummy plugs used for unused cable glands must be compliant with the type of
protection of the housing being used.
It must be ensured that the cable gland gaskets are correctly seated.
4.2.4.1 Sensor circuits
Compact mounted transmitter UMC3
, the sensor circuits are considered as internal connections and are already wired by the manufacturer. In such
an assembly there is no requirement for verification of these intrinsic safe circuits by the operator.
Remote installation of UMC3
The intrinsically safe sensor circuits are brought out from the transmitter via a cable gland with a cable of at
least 1 m in length. The length of the cable can be specified and purchased when ordering.
The transmitter is fixed by a bracket to a wall or a pipe.
The sensor cable is to be installed by the operator so that it is protected from tension.
The assignment of the wire colors and the circuits see section 4.1.2.3

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Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 17 of 37
4.2.5 Parameters for the UMC3 transmitter
4.2.5.1 Power circuit (terminals L, N and PE)
Nominal voltage AC 90 to 230 V
Max. voltage Um AC 265 V
Nominal voltage AC 24 V
Max. voltage Um AC 30 V
Nominal voltage DC 19 to 36 V
Max. voltage Um DC 36 V
4.2.5.2 Non-intrinsically safe circuits for Type UMC3-*****2
Current output 1 (terminals 41 to 42)
Current output 2 (terminals 43 to 44)
Binary output 1, passive (terminals 46 to 47)
Binary output 1, active (terminals 45 and 489
Binary output 2, passive (terminals 49 to 50)
Binary output 3, passive (terminals 53 to 54)
Binary output (terminals 51 to 52)
Serial interface RS485 Profibus-DP / Modbus (terminals 37 to 38)
Voltage Um AC/DC 60 V
Max. current of power supply 500 mA
4.2.5.3 Type of protection Ex ia II sensor circuits
Excitation circuit (terminals 9 and 10)
Linear output characteristic
Voltage Uo DC 19,5 V
Current Io 90 mA
Power Po 400 mW
with Ex ia IIC type of protection
Max. external inductance Lo 5 mH
Max. external capacitance Co 240 nF
with Ex ia IIB type of protection
Max. external inductance Lo 18 mH
Max. external capacitance Co 1490 nF

Heinrichs Messtechnik GmbH
Page 18 of 37
Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Temperature sensor circuit (terminals 5 to 8)
Voltage Uo DC 19,5 V
Current Io 6.4 mA
Power Po 31 mW
Linear output characteristic
with Ex ia IIC type of protection
Max. external inductance Lo 870 mH
Max. external capacitance Co 225 nF
with Ex ia IIB type of protection
Max. external inductance Lo 1000 mH
Max. external capacitance Co 1475 nF
Sensor circuits (terminals 1 and 2, 3 and 4)
Values for each circuit
Voltage Uo DC 19,5 V
Current Io 25 mA
Power Po 128 mW
Linear output characteristic
with Ex ia IIC type of protection
Max. external inductance Lo 58 mH
Max. external capacitance Co 154 nF
with Ex ia IIB type of protection
Max. external inductance Lo 210 mH
Max. external capacitance Co 1404 nF
4.2.5.4 Signal output circuits
Current output 1 (terminals 11 and 12) and current output 2 (terminals 13 and 14) for type UMC3-*****1,
level of protection Ex ia
Voltage Uo DC 19,2 V
Current Io 84 mA
Power Po 400 mW
linear output characteristic
with level of protection Ex ia IIC
Max. external inductance Lo 5 mH
Max. external capacitance Co 230 nF

Heinrichs Messtechnik GmbH
Ex- Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
Page 19 of 37
with level of protection Ex ia IIB
Max. external inductance Lo 19,8 mH
Max. external capacitance Co 1,53 µF
Binary outputs for type UMC3-*****1
Binary output 1 (terminals 16 and 17)
Binary output 2 (terminals 19 and 20) and
Binary output 3 (terminals 33 - 34)
floating opto-coupler output circuits, level of protection Ex ia IIC
Voltage Ui DC 30 V
Current Ii 200 mA
Power Pi 3 W
Effective internal inductance Li 0,2 mH
Effective internal capacitance Ci 20 nF
Binary input (terminals 21 and 22) for type UMC3-*****1, level of protection Ex ia
Linear output characteristic
Voltage Uo DC 30 V
Current Io 15 Ma
Power Po 113 mW
with level of protection Ex ia IIC
Max. external inductance Lo 160 mH
Max. external capacitance Co 64,8 nF
with level of protection Ex ia IIB
Max. external inductance Lo 560 mH
Max. external capacitance Co 558,8 nF

Heinrichs Messtechnik GmbH
Page 20 of 37
Ex-Supplement operating manual
UMC3 with TM/TMU/TME/TMR/TM-SH
4.2.5.5 Bus Communication circuits
Profibus-PA, Type UMC3-***D***, (terminals 39 –40) Level of protection Ex ia IIC
for use as field device in a fieldbus system in accordance with FISCO model
(PTB Bericht PTB-W-53/IEC 60079-28)
Voltage Ui DC 17,5 V
Effective internal inductance Li negligible
Effective internal capacitance Ci 1,2 nF
for connection to an intrinsically safe communication circuit with
Voltage Ui DC 32 V
Current Ii 280 mA
Power Pi 2 W
Effective internal inductance Li negligible
Effective internal capacitance Ci 1,2 nF
FOUNDATION-Fieldbus, Type UMC3-***J***, (terminals 55–56) for use as field device in a fieldbus system in
accordance with FISCO
for connection to an intrinsically safe communication circuit
Level of protection Ex ia IIC
Voltage Ui DC 24 V
Current Ii 250 mA
Effective internal inductance Li 10 µH
Effective internal capacitance Ci negligible
Level of protection Ex ia IIB
Voltage Ui DC 17,5 V
Current Ii 380 mA
Effective internal inductance Li 10 µH
Effective internal capacitance Ci negligible
Profibus DP - RS485-IS (Type UMC3-***E***, and Modbus Type UMC3-***F***),
(terminals 35 and 36), Type of protection Ex ia IIC
Voltage Uo DC 4,1 V
Current Io 59 mA
Power Po 61 mW
linear output characteristic for the connection of an intrinsically safe circuit with:
Voltage Ui DC 4,5 V
Effective internal inductance Li negligible
Effective internal capacitance Ci negligible