XA02591T/09/EN/01.21-00
71552197
2021-12-20

ProductsSolutions

Safety Instructions
Temperature transmitter
iTEMP TMT142B
0Ex ia IIC T6...T4 Ga X
Ex ia IIIC T85°C…T110°C Db X
1Ex db IIC T6...T4 Gb X
Ex tb IIIC T110°C Db X

ServicesTemperature transmitter

XA02591T

Temperature transmitter
iTEMP TMT142B
Table of contents
Associated documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Supplementary Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
EAC certificate of conformity according to TR CU 012/2011 . . . . . . . . . 4
Manufacturer address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety instructions: Ex db . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Safety instructions: Ex ia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Temperature tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical connection data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Endress+Hauser

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XA02591TAssociateddocumentation

Temperature transmitterThis document is an integral part of the following Operating
Instructions:
TMT142B:
Operating Instructions: BA00191R/09
Brief Operating Instructions: KA00222R/09
The Operating Instructions which correspond to the device type apply.

Supplementary
Documentation

The Explosion-protection brochure is available:
In the download area of the Endress+Hauser website:www.endress.com -> Downloads -> "Brochures and catalogs" ->Text Search: CP00021Z

EAC certificate ofconformity
according to TR
CU 012/2011

The temperature transmitters meet the fundamental health and safetyrequirements for the design and construction of devices and protectivesystems intended for use in potentially explosive atmospheres.
Certification body: НАНИО "ЦСВЭ"Certificate number: ЕАЭС RU С-DE.АА87.В.00686/21
Affixing the certificate number certifies conformity with the following
standards:
GOST 31610.0-2014 (IEC 60079-0:2011)
GOST IEC 60079-1-2013
GOST 31610.11-2014 (IEC 60079-11:2011)
GOST IEC 60079-31:2013

Manufacturer
address

Endress+Hauser Wetzer GmbH + Co KG
Obere Wank 1
D-87484 Nesselwang
Germany
Phone: +49 (0)8361 308 0

Safetyinstructions: Exdb4

Endress+HauserTemperature transmitter

XA02591T

Non-hazardous area

Hazardous area
Zone 1, 2
EPL Gb, Gc

TMT142B

Remote mount sensor
configuration:
RTD, TC sensor

Power supply

Flameproof approved temperature sensor
assembly
TMT142B

Integral mount sensor
configuration:
Power supply

Local potential equalization
A0047183

Safety instructions: Installation• Comply with the installation and safety instructions in the Operating
Instructions.
• Install the device according to the manufacturer's instructions andany other valid standards and regulations (e.g. GOST 30852.13 (IEC60079-14)).
• The housing of field transmitter must be connected to the potential
matching line.
• Only the approved wire entries as specified in paragraph 10.3 ofGOST 30852.13 (IEC 60079-14), paragraph 16 of GOST 52350.0(IEC 60079-0), paragraph 13 of GOST 30852.1 (IEC 60079-1) must
be used.
• For connection through a conduit entry approved for this purpose theassociated sealing facility shall be mounted directly to the housing.
• Seal unused entry glands with approved sealing plugs that correspondto the type of protection.
• For operating the transmitter housing at an ambient temperature
under –20 °C, appropriate cables and cable entries permitted for thisapplication must be used.

Endress+Hauser

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XA02591T

Temperature transmitter• For ambient temperatures higher than +70 °C, use suitable heatresisting cables or wires, cable entries and sealing facilities for Ta+5 K above surrounding.
• During operation, the cover must be screwed all the way in and thecover's safety catch must be fastened.
• The remote or integral mounted temperature sensor must comply
with the requirements according to GOST 30852.1 (IEC 60079-1).
Safety instructions: Special conditions
NOTICEExplosive atmosphere‣ Do not open the electrical connection of the power supply circuit in
an explosive atmosphere.
• The flameproof joints are not intended to be repaired.
• Use for integral temperature sensors only approved sensors certified
for EPL Ga marked not less than Ех db IIC T6…T4 Ga/Gb for use inZone 0.
• Use for remote temperature sensors only approved sensors certified
for EPL Gb marked not less than Ex db IIC T6…T4 Gb for use in Zone
1.
• The temperature class specified for the certified temperature sensor
shall be taken into account.
• The temperature transmitter must be installed so, that even in theevent of rare incidents, an ignition source due to impact or friction
between the enclosure and iron/steel is excluded.

6Endress+HauserTemperature transmitter

XA02591T

Safetyinstructions: Ex ia
Hazardous area
Zone 0, 1, 2
EPL Ga, Gb, Gc

Remote mount sensor
configuration:e.g. RTD, TC Sensor(simple apparatus)

Integral mount sensor
configuration:

Non-hazardous area

Associated intrinsically safe
power supply unit with max.
- electrical specifications
from tables below+

Associated intrinsically safe
power supply unit with max.
- electrical specifications
from tables below+

Local potential equalisation
A0047186

Endress+Hauser

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XA02591T

Temperature transmitter

Associated intrinsically safe
power supply unit with max.
electrical specifications
from tables below

Non-hazardous
area

Hazardous area
Zone 0, 1, 2
Zone 21, 22

TMT142B

Hazardous area
Zone 0, 1, 2
Zone 20, 21

Remote or integral
mount sensor assembly e.g. RTD, TC Sensor(simple apparatus)

Local potential
equalisation

A0047486

Safety instructions: Installation• Comply with the installation and safety instructions in the OperatingInstructions.
• Install the device according to the manufacturer's instructions andany other valid standards and regulations GOST 30852.13 (IEC60079-14).
• Connect the device using suitable cable and wire entries of protection
type "Intrinsic safety (Ex i)".
• The type of protection changes as follows when the devices areconnected to certified intrinsically safe circuits of Category ib: Ex ib
IIC. When connecting an intrinsically safe ib circuit, do not operate
the sensor at Zone 0.
• Continuous duty temperature of the cable Ta +5 K.
• To maintain the ingress protection of the housing IP66/67 install thehousing cover and cable glands correctly.
• Close unused entry glands with sealing plugs.
• The pertinent guidelines must be observed when intrinsically safe
circuits are connected together acc. GOST 30852.13 (IEC 60079-14)(Proof of Intrinsic Safety).
• The electrical apparatus must be integrated into the local potentialequalization.
• When connecting two independent sensors make sure that thepotential equalisation cables are at the same potential.

8Endress+HauserTemperature transmitter

XA02591T

Safety instructions: Zone 0• Only operate devices in potentially explosive vapour/air mixtures
under atmospheric conditions:• -50 °C ≤ Ta ≤ +60 °C• 0.8 bar ≤ p ≤ 1.1 bar• If no potentially explosive mixtures are present, or if additional
protective measures have been taken, according to EN 1127-1, thetransmitters may be operated under other atmospheric conditions inaccordance with the manufacturer's specifications.
• Associated apparatus with galvanic isolation between the intrinsicallysafe and non-intrinsically safe circuits are preferred.
Safety instructions: Specific conditions of use• Unit is may not be used when hybrid mixtures (gas, dust, air) arepresent.
• The temperature transmitter must be installed so, that even in theevent of rare incidents, an ignition source due to impact or friction
between the enclosure and iron/steel is excluded.
• Use for integral temperature sensors only approved sensors certified
for EPL Da or Db marked not less than Ex ia IIIC T110 °C Da/Db or Exia IIIC T110 °C Db for use in Zone 20 or Zone 21.
• Use for remote temperature sensors only approved sensors certified
for EPL Db marked not less than Ex ia IIIC T110 °C Db for use in Zone
21.

Temperaturetables

The ambient temperature range is depending on temperature class andmaximum temperature of the enclosure Txx°C, applicable to themaximum dust layer thickness of 5 mm, listed in the following table:
TypeTMT142B

Endress+Hauser

Temperature classAmbient temperature
Zone 1 EPL Gb

Zone 0 EPL Ga

T6–50 °C ≤ Ta ≤ +55 °C–50 °C ≤ Ta ≤ +40 °C

T5–50 °C ≤ Ta ≤ +70 °C–50 °C ≤ Ta ≤ +50 °C

T4–50 °C ≤ Ta ≤ +85 °C–50 °C ≤ Ta ≤ +60 °C

TypeMaximum surface
temperature

Ambient temperature
Zone 21 EPL Db

TMT142B

T85 °C–40 °C ≤ Ta ≤ +55 °C

T100 °C–40 °C ≤ Ta ≤ +70 °C

T110 °C–40 °C ≤ Ta ≤ +85 °C

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XA02591T

Temperature transmitter

Electricalconnection data
TypeElectrical data

TMT142B

Supply (terminals + and -):Ui ≤ 30 VDC
Ii ≤ 300 mA
Pi ≤ 1 000 mW
Ci ≤ 5 nF
Li = 0Sensor circuit (terminals 1 to 4):

Uo ≤ 4.3 VDC
Io ≤ 4.8 mAPo ≤ 5.2 mW

Maximum connection values:
Ex ia IIC
Ex ia IIB
Ex ia IIA

10

Lo = 40 mH
Lo = 150 mH
Lo = 300 mH

Co = 10.4 µF
Co = 160 µF
Co = 1 000 µF

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