Endress+Hauser iTEMP TMT86 User manual

Products Solutions Services
Operating Instructions
iTEMP TMT86
Dual-input temperature transmitter
PROFINET® protocol
BA02144T/09/EN/01.22-00
71589323
2022-04-01
Valid as of version
01.0x (device version)

iTEMP TMT86 Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 4
1.1 Symbols .............................. 4
1.2 Tool symbols .......................... 5
1.3 Documentation ........................ 5
1.4 Registered trademarks ................... 6
2 Safety instructions .................. 7
2.1 Requirements for personnel ............... 7
2.2 Intended use .......................... 7
2.3 Workplace safety ....................... 7
2.4 Operational safety ...................... 7
2.5 Product safety ......................... 8
2.6 IT security ............................ 8
2.7 Device-specific IT security ................ 8
3 Product description ................. 9
4 Incoming acceptance and product
identification ....................... 9
4.1 Incoming acceptance .................... 9
4.2 Product identification .................... 9
4.3 Certificates and approvals ............... 10
4.4 Storage and transport .................. 10
5 Installation ....................... 10
5.1 Mounting requirements ................. 10
5.2 Mounting the measuring device ........... 11
5.3 Post-mounting check ................... 14
6 Electrical connection .............. 15
6.1 Connecting requirements ................ 15
6.2 Connecting the measuring device .......... 15
6.3 Connecting the sensor cables ............. 17
6.4 Ensuring the degree of protection .......... 19
6.5 Post-connection check .................. 19
7 Operation options ................. 20
7.1 Overview of operation options ............ 20
7.2 Structure and function of the operating
menu .............................. 23
7.3 Access to operating menu via web browser ... 25
7.4 Access to the operating menu via operating
tools ............................... 29
8 System integration ................ 31
8.1 Overview of device description files ......... 31
8.2 Overview of system files ................. 31
8.3 Cyclic data transmission ................. 32
9 Commissioning .................... 36
9.1 Installation check ...................... 36
9.2 Switching on the device ................. 36
9.3 Configuring the device address via software .. 36
9.4 Device configuration ................... 36
9.5 Simulation ........................... 40
9.6 Protecting settings from unauthorized access .40
10 Operation ......................... 42
10.1 Reading off the device locking status ....... 42
10.2 Reading off measured values ............. 42
10.3 Adapting the measuring device to the process
conditions ........................... 42
11 Diagnostics and troubleshooting ... 43
11.1 General troubleshooting ................. 43
11.2 Diagnostic information on local display ...... 45
11.3 Diagnostic information via communication
interface ............................ 45
11.4 Overview of diagnostic events ............. 46
11.5 Event logbook ........................ 48
11.6 Thermowell monitoring with second process
seal (dual seal) ....................... 49
11.7 Firmware history ...................... 49
12 Maintenance ...................... 49
13 Repair ............................ 49
13.1 General information ................... 49
13.2 Spare parts .......................... 49
13.3 Return .............................. 50
13.4 Disposal ............................ 50
14 Accessories ....................... 50
14.1 Device-specific accessories ............... 50
14.2 Communication-specific accessories ........ 51
14.3 Service-specific accessories ............... 51
15 Technical data .................... 52
15.1 Function and system design .............. 52
15.2 Input ............................... 54
15.3 Output ............................. 55
15.4 Performance characteristics .............. 56
15.5 Environment ......................... 62
15.6 Mechanical construction ................ 63
15.7 Operability .......................... 66
15.8 Certificates and approvals ............... 67
15.9 Ordering information ................... 67
15.10 Supplementary documentation ............ 68
Index .................................. 69

About this document iTEMP TMT86
4 Endress+Hauser
1 About this document
1.1 Symbols
1.1.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.1.2 Electrical symbols
Symbol Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.
Potential equalization connection (PE: protective earth)
Ground terminals that must be connected to ground prior to establishing any other
connections.
The ground terminals are located on the interior and exterior of the device:
• Interior ground terminal: potential equalization is connected to the supply network.
• Exterior ground terminal: device is connected to the plant grounding system.
1.1.3 Symbols for certain types of information
Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation
A
Reference to page

iTEMP TMT86 About this document
Endress+Hauser 5
Symbol Meaning
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
… Series of steps
Result of a step
Help in the event of a problem
Visual inspection
1.1.4 Symbols in graphics
Symbol Meaning Symbol Meaning
1, 2, 3,... Item numbers
1.
,
2.
,
3.
… Series of steps
A, B, C, ... Views A-A, B-B, C-C, ... Sections
-
Hazardous area
.
Safe area (non-hazardous area)
1.2 Tool symbols
Symbol Meaning
A0011220
Flat-blade screwdriver
A0011219
Phillips head screwdriver
A0011221
Allen key
A0011222
Open-ended wrench
A0013442
Torx screwdriver
1.3 Documentation
Document Purpose and content of the document
Technical Information (TI) Planning aid for your device
The document contains all the technical data on the device and provides
an overview of the accessories and other products that can be ordered for
the device.
Brief Operating Instructions (KA) Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential information
from incoming acceptance to initial commissioning.
Operating Instructions (BA) Your reference document
The Operating Instructions contain all the information that is required in
various phases of the life cycle of the device: from product identification,
incoming acceptance and storage, to mounting, connection, operation
and commissioning through to troubleshooting, maintenance and
disposal.

About this document iTEMP TMT86
6 Endress+Hauser
Document Purpose and content of the document
Description of Device Parameters
(GP)
Reference for your parameters
The document provides a detailed explanation of each individual
parameter. The description is aimed at those who work with the device
over the entire life cycle and perform specific configurations.
Safety Instructions (XA) Depending on the approval, Safety Instructions (XA) are supplied with the
device. The Safety Instructions are an integral part of the Operating
Instructions.
Information on the Safety Instructions (XA) that are relevant for
the device is provided on the nameplate.
Supplementary device-dependent
documentation (SD/FY)
Additional documents are supplied depending on the device version
ordered: Always comply strictly with the instructions in the
supplementary documentation. The supplementary documentation is an
integral part of the device documentation.
The document types listed are available:
• In the Download Area of the Endress+Hauser Internet site: www.endress.com →
Download
• Enter the serial number from the nameplate in the W@M Device Viewer
(www.endress.com/deviceviewer): all data relating to the device and an overview of
the Technical Documentation supplied with the device are displayed.
• Enter the serial number on the nameplate into the Endress+Hauser Operations app
or scan the 2-D matrix code (QR code) on the nameplate with the Endress+Hauser
Operations app: all data relating to the device and the Technical Documentation
pertaining to the device is displayed.
1.4 Registered trademarks
PROFINET®
Registered trademark of the PROFIBUS Nutzerorganisation e.V. (PROFIBUS User
Organization), Karlsruhe, Germany

iTEMP TMT86 Safety instructions
Endress+Hauser 7
2 Safety instructions
2.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
‣Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣Personnel must be authorized by the plant owner/operator.
‣Be familiar with federal/national regulations.
‣Before starting work: personnel must read and understand the instructions in the
manual and supplementary documentation as well as the certificates (depending on
the application).
‣Personnel must follow instructions and comply with general policies.
The operating personnel must fulfill the following requirements:
‣Personnel are instructed and authorized according to the requirements of the task by
the facility's owner-operator.
‣Personnel follow the instructions in this manual.
2.2 Intended use
The device is a universal and user-configurable temperature transmitter with either one or
two sensor inputs for a resistance thermometer (RTD), thermocouples (TC), resistance and
voltage transmitters. The head transmitter version of the device is intended for mounting
in a terminal head (flat face) as per DIN EN 50446. It is also possible to mount the device
on a DIN rail using the optional DIN rail clip.
If the device is used in a manner not specified by the manufacturer, the protection
provided by the device may be impaired.
The manufacturer is not liable for damage caused by improper or non-intended use.
The head transmitter must not be operated as a DIN rail substitute in a cabinet by
using the DIN rail clip with remote sensors.
2.3 Workplace safety
When working on and with the device:
‣Wear the required personal protective equipment as per national regulations.
2.4 Operational safety
‣Operate the device only if it is in proper technical condition, free from errors and faults.
‣The operator is responsible for the interference-free operation of the device.
Hazardous area
To eliminate a danger for persons or for the facility when the device is used in the
hazardous area (e.g. explosion protection or safety equipment):
‣Based on the technical data on the nameplate, check whether the ordered device is
permitted for the intended use in the hazardous area. The nameplate can be found on
the side of the transmitter housing.
‣Observe the specifications in the separate supplementary documentation that is an
integral part of these instructions.

Safety instructions iTEMP TMT86
8 Endress+Hauser
Device safety and electromagnetic compatibility
The measuring system complies with the general safety requirements and EMC
requirements of the IEC/EN 61326 series and the APL EMC Test Specification.
2.5 Product safety
This product is designed in accordance with good engineering practice to meet state-of-
the-art safety requirements and has been tested and left the factory in a condition in
which it is safe to operate.
2.6 IT security
Our warranty is valid only if the product is installed and used as described in the Operating
Instructions. The product is equipped with security mechanisms to protect it against any
inadvertent changes to the settings.
IT security measures, which provide additional protection for the product and associated
data transfer, must be implemented by the operators themselves in line with their security
standards.
2.7 Device-specific IT security
The device offers specific functions to support protective measures by the operator. These
functions can be configured by the user and guarantee greater in-operation safety if used
correctly. The device provides a password for changing the user role (applies to operation
via web server, FieldCare, DeviceCare, PDM).
Function/interface Factory setting Recommendation
Password
(also applies for web server login or
FieldCare connection)
Not enabled
(0000)
Assign a customized access code during
commissioning.
Web server Enabled On an individual basis following risk assessment.
Service interface (CDI) Enabled On an individual basis following risk assessment.
Write protection via hardware write
protection switch
Not enabled On an individual basis following risk assessment.
2.7.1 Protecting access via a password
Different passwords are available to protect write access to the parameters of the device.
User-specific password
Write access to the device parameters via the web browser or operating tool (e.g.
FieldCare, DeviceCare) can be protected by the modifiable, user-specific password.
When the device is delivered, the device does not have an access code and is equivalent to
0000 (open).
General notes on the use of passwords
• During commissioning, any passwords that were used at delivery should be changed.
• Follow the general rules for generating a secure password when defining and managing
the password.
• The user is responsible for the management and careful handling of passwords.
• For information on how to configure the access code or on the action to take if the
password is lost, for example, please refer to the "Write protection via access code"
section

iTEMP TMT86 Product description
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2.7.2 Access via web server
The web server is enabled when the device is delivered. The web server can be disabled via
the Web server functionality parameter if necessary (e.g. after commissioning).
The device and status information can be hidden on the login page. This prevents
unauthorized access to the information.
For detailed information on device parameters, see:
"Description of Device Parameters" document
3 Product description
The temperature transmitter is a 2-wire device with two measuring inputs. The device not
only transfers converted signals from resistance thermometers and thermocouples, it also
transfers resistance and voltage signals using PROFINET® communication. The device is
powered via 2-wire Ethernet (Single Pair Ethernet) and the transmitter can be installed as
an intrinsically safe apparatus in Zone 1 hazardous areas. The device is used for
instrumentation purposes in the terminal head, form B (flat face), according to DIN EN
50446. Data transfer is via 5 Analog Input (AI) function blocks.
4 Incoming acceptance and product
identification
4.1 Incoming acceptance
1. Unpack the temperature transmitter carefully. Are the contents or packaging
undamaged?
 Do not install damaged components, as otherwise the manufacturer cannot
guarantee the material resistance or ensure compliance with the original safety
requirements, and therefore cannot be held responsible for any resulting
damage.
2. Is the delivery complete or is anything missing? Check the scope of delivery against
your order.
3. Does the nameplate match the order information on the delivery note?
4. Are the technical documentation and all other necessary documents provided? If
applicable: are the Safety Instructions (e.g. XA) for hazardous areas provided?
If one of these conditions is not met, please contact the manufacturer's sales office.
4.2 Product identification
The following options are available for identification of the device:
• Nameplate specifications
• Extended order code with breakdown of the device features on the delivery note
• Enter the serial number from the nameplate in the W@M Device Viewer
(www.endress.com/deviceviewer): all data relating to the device and an overview of the
Technical Documentation supplied with the device are displayed.
• Enter the serial number on the nameplate into the Endress+Hauser Operations App or
scan the 2-D matrix code (QR code) on the nameplate with the Endress+Hauser
Operations App: all the information about the device and the technical documentation
pertaining to the device is displayed.

Installation iTEMP TMT86
10 Endress+Hauser
4.2.1 Nameplate
Do you have the correct device?
Compare and check the information on the nameplate of the device against the
requirements of the measuring point.
Information on the nameplate:
• APL port profile (specifies device type, as well as voltage supply and power consumption)
• Serial number, device revision, firmware version and hardware version
• Data Matrix 2D code
• 2 lines for the TAG name and extended order code
• Approval in hazardous area with number of the relevant Ex documentation (XA...)
• Approvals with symbols
4.2.2 Name and address of manufacturer
Name of manufacturer: Endress+Hauser Wetzer GmbH + Co. KG
Model/type reference: TMT86
Address of manufacturer: Obere Wank 1, D-87484 Nesselwang or www.endress.com
4.3 Certificates and approvals
For certificates and approvals valid for the device: see the data on the nameplate
Approval-related data and documents: www.endress.com/deviceviewer → (enter the
serial number)
4.4 Storage and transport
Storage temperature: –52 to +100 °C (–61.6 to +212 °F)
Humidity
• Condensation permitted with head transmitter
• Max. rel. humidity: 95 % as per IEC 60068-2-30
Pack the device for storage and transportation in such a way that it is reliably
protected against impact and external influences. The original packaging provides
optimum protection.
Avoid the following environmental influences during storage and transport:
• Direct sunlight
• Vibration
• Aggressive media
5 Installation
5.1 Mounting requirements
5.1.1 Dimensions
The dimensions of the device are provided in the "Technical data" section .

iTEMP TMT86 Installation
Endress+Hauser 11
5.1.2 Mounting location
• In the terminal head, flat face, as per DIN EN 50446, direct mounting on insert with
cable entry (middle hole 7 mm)
• In the field housing, separated from the process (see "Accessories" section )
It is also possible to mount the head transmitter on a DIN rail as per IEC 60715 using
the DIN rail clip accessory (see "Accessories" section).
Information about the conditions (such as the ambient temperature, degree of protection,
climate class, etc.) that must be present at the installation point so that the device can be
mounted correctly is provided in the "Technical data" section .
For use in hazardous areas, the limit values specified on the certificates and approvals
must be observed (see Ex Safety Instructions).
5.2 Mounting the measuring device
A Phillips head screwdriver is required to mount the device:
• Maximum torque for securing screws = 1 Nm (¾ foot-pound), screwdriver: Pozidriv Z2
• Maximum torque for screw terminals = 0.35 Nm (¼ foot-pound), screwdriver: Pozidriv
Z1
5.2.1 Head transmitter mounting
1
2
3
4
5
6
7
9
8
1 2 3 4 5 1234
120 mm
(4.72 in)
120 mm
(4.72 in)
Item A Item B
Item C
A0048481
 1 Head transmitter mounting (three versions)
Item A Mounting in a terminal head (terminal head flat face as per DIN 43729)
1 Terminal head
2 Circlips
3 Insert

Installation iTEMP TMT86
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Item A Mounting in a terminal head (terminal head flat face as per DIN 43729)
4 Connection wires
5 Head transmitter
6 Mounting springs
7 Mounting screws
8 Terminal head cover
9 Cable entry
Procedure for mounting in a terminal head, item A:
1. Open the terminal head cover (8) on the terminal head.
2. Guide the connection wires (4) of the insert (3) through the center hole in the head
transmitter (5).
3. Fit the mounting springs (6) on the mounting screws (7).
4. Guide the mounting screws (7) through the side boreholes of the head transmitter
and the insert (3). Then fix both mounting screws with the snap rings (2).
5. Then tighten the head transmitter (5) along with the insert (3) in the terminal head.
6. When the wiring is complete, close the terminal head cover (8) tightly again.
Item B Mounting in a field housing
1 Field housing cover
2 Mounting screws with springs
3 Head transmitter
4 Field housing
120 mm
(4.72 in)
140 mm
(5.51 in)
21 mm
(0.83 in)
!6.5 mm
(0.25 in)
A0024604
 2 Dimensions of angle bracket for wall mount (complete wall mounting set available as accessory)
Procedure for mounting in a field housing, item B:
1. Open the cover (1) of the field housing (4).
2. Guide the mounting screws (2) through the lateral bores in the head transmitter (3).
3. Screw the head transmitter to the field housing.
4. When the wiring is complete, close the field housing cover (1) again.

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Endress+Hauser 13
Item C Mounting on DIN rail (DIN rail as per IEC 60715)
1 Mounting screws with springs
2 Head transmitter
3 Circlips
4 DIN rail clip
5 DIN rail
Procedure for mounting on a DIN rail, item C:
1. Press the DIN rail clip (4) onto the DIN rail (5) until it engages with a click.
2. Fit the mounting springs on the mounting screws (1) and guide the screws through
the side boreholes of the head transmitter (2). Then fix both mounting screws with
the snap rings (3).
3. Screw the head transmitter (2) onto the DIN rail clip (4).
Mounting typical of North America
12 3 456
A0008520
 3 Head transmitter mounting
1 Thermowell
2 Insert
3 Adapter, coupling
4 Terminal head
5 Head transmitter
6 Mounting screws
Thermometer design with thermocouples or RTD sensors and head transmitter:
1. Fit the thermowell (1) on the process pipe or the container wall. Secure the
thermowell according to the instructions before the process pressure is applied.
2. Fit the necessary neck tube nipples and adapter (3) on the thermowell.
3. Make sure sealing rings are installed if such rings are needed for harsh
environmental conditions or special regulations.
4. Guide the mounting screws (6) through the lateral bores of the head transmitter (5).
5. Position the head transmitter (5) in the terminal head (4) in such a way that the bus
cable (terminals 1 and 2) point to the cable entry.
6. Using a screwdriver, screw down the head transmitter (5) in the terminal head (4).
7. Guide the connection wires of the insert (3) through the lower cable entry of the
terminal head (4) and through the middle hole in the head transmitter (5). Connect
the connection wires to the transmitter.
8. Screw the terminal head (4), with the integrated and wired head transmitter, onto
the ready-mounted nipple and adapter (3).

Installation iTEMP TMT86
14 Endress+Hauser
NOTICE
The terminal head cover must be secured properly to meet the requirements for
explosion protection.
‣After wiring, securely screw the terminal head cover back on.
Mounting the display on the head transmitter
1. 2.
3.
A0009852
 4 Mounting the display
1. Loosen the screw on the terminal head cover. Flip back the terminal head cover.
2. Remove the cover of the display connection area.
3. Fit the display module onto the mounted and wired head transmitter. The fastening
pins must click securely into place on the head transmitter. After mounting, securely
tighten the terminal head cover.
The display can be used only with the appropriate terminal heads - cover with viewing
window (e.g. TA30 from Endress+Hauser).
5.3 Post-mounting check
After installing the device, run the following final checks:
Device health and specifications Notes
Is the device undamaged (visual inspection)? -
Do the ambient conditions match the device specification (e.g. ambient temperature,
measuring range, etc.)?
See "Technical data'
section"

iTEMP TMT86 Electrical connection
Endress+Hauser 15
6 Electrical connection
6.1 Connecting requirements
A Phillips head screwdriver is required to wire the head transmitter with screw terminals.
No tools are required for the version with push-in terminals.
LCAUTION
‣Switch off the power supply before installing or connecting the device. Failure to
observe this may result in the destruction of parts of the electronics.
‣When connecting Ex-certified devices, please take special note of the instructions and
connection schematics in the Ex-specific supplement to these Operating Instructions.
‣Do not occupy the display connection. An incorrect connection can destroy the
electronics.
‣Before connecting the power supply, connect the potential equalization line to the
external ground terminal.
‣The device may only be powered by a power unit with an energy-limited circuit in
accordance with UL/EN/IEC 61010-1, Section 9.4 and the requirements of Table 18.
6.2 Connecting the measuring device
Head transmitter:
AC
RD
WH
B
1+
2-
7
6
5
4
3
RD (BK)
WH (YE)
D
G
H
1
2
E F
A0048881
 5 Assignment of terminal connections for head transmitter
A Sensor input 2, TC and mV, external cold junction (CJ) Pt1000
B Sensor input 2, TC and mV, internal cold junction (CJ)
C Sensor input 2, RTD and Ω, 2- and 3-wire
D Sensor input 1, TC and mV, external cold junction (CJ) Pt1000
E Sensor input 1, TC and mV, internal cold junction (CJ)
F Sensor input 1, RTD and Ω, 2-, 3- and 4-wire
G Display connection, service interface
H Bus connection and power supply
NOTICE
‣ ESD - Electrostatic discharge. Protect the terminals from electrostatic discharge.
Failure to observe this may result in the destruction or malfunction of parts of the
electronics.
6.2.1 Fieldbus connection
Devices can be connected to the fieldbus in two ways:

Electrical connection iTEMP TMT86
16 Endress+Hauser
• via conventional cable gland →  16
• via fieldbus connector
Risk of damage
• Switch off the power supply before installing or connecting the head transmitter.
Failure to observe this may result in the destruction of parts of the electronics.
• Grounding via one of the grounding screws (terminal head, field housing) is
recommended.
• If the shielding of the fieldbus cable is grounded at more than one point in systems
without additional potential equalization, mains-frequency equalizing currents may
occur and cause damage to the cable or shielding. In such cases, the shielding of the
fieldbus cable should be grounded on one side only, i.e. it must not be connected to
the ground terminal of the housing (terminal head, field housing). The shield that is
not connected should be insulated!
• We recommend that the fieldbus not be looped using conventional cable glands. If
you replace even just one measuring device at a later date, the bus communication
will have to be interrupted.
Cable gland or entry
Please also follow the general procedure on →  15.
2
1
3
4
5
6
A0041953
 6 Connecting the signal cables and power supply
1 Head transmitter installed in field housing
2 Head transmitter installed in terminal head
3 Terminals for fieldbus communication and power supply
4 Internal ground connection
5 External ground connection
6 Shielded fieldbus cable

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Endress+Hauser 17
Terminals
Choice of screw or push-in terminals for sensor cables and supply cables. The terminals for
the fieldbus connection (1+ and 2-) are independent of polarity. A shielded cable must be
used for the connection.
Terminal design Cable design Cable cross-section
Screw terminals Rigid or flexible ≤ 2.5 mm² (14 AWG)
Push-in terminals
(cable design, stripping length =
min. 10 mm (0.39 in))
Rigid or flexible 1) 0.2 to 1.5 mm² (24 to 16 AWG)
Flexible with wire end ferrules
with/without plastic ferrule
0.25 to 1.5 mm² (24 to 16 AWG)
1) In the case of push-in terminals and flexible cables with a cross-section ≤ 0.3 mm² (22 AWG), wire end
ferrules must be used.
For more information on shielding, connector PIN assignment, etc., see "Ethernet-APL
Engineering Guideline" at https://www.ethernet-apl.org
6.2.2 Supply voltage
Connecting to an APL field switch
The device must be used in accordance with the APL port classification:
Hazardous areas: SLAA or SLAC (details in Ex safety instructions)
Non-hazardous areas: SLAX connection to an APL field switch with maximum voltage of
15 VDC and minimal output power of 0.54 W. This corresponds to an APL field switch
with APL port classification SPCC or SPAA, for example.
Ethernet-APL power class A (9.6 to 15 VDC, 540 mW)
Maximum power consumption: 0.7 W
Connecting to an SPE switch
In non-hazardous areas, the device can be used with a suitable SPE field switch: The device
can be connected to an SPE switch with a maximum voltage of 30 VDC and a minimum
output power of 1.85 W. The SPE switch must support the 10BASE-T1L standard and the
PoDL power classes 10, 11 or 12 and recognize SPE field devices without an integrated
PoDL module.
The field switch must be tested to ensure that it meets safety requirements (e.g.
PELV, SELV, Class 2).
6.3 Connecting the sensor cables
Terminal assignment of sensor connections
NOTICE
When connecting 2 sensors ensure that there is no galvanic connection between the
sensors (e.g. caused by sensor elements that are not isolated from the thermowell).
The resulting equalizing currents distort the measurements considerably.
‣The sensors must remain galvanically isolated from one another by connecting each
sensor separately to a transmitter. The transmitter provides sufficient galvanic isolation
(> 2 kV AC) between the input and output.

Electrical connection iTEMP TMT86
18 Endress+Hauser
The following connection combinations are possible when both sensor inputs are assigned:
→  15
Sensor input 1
Sensor
input 2
RTD or
resistance
transmitte
r, 2-wire
RTD or
resistance
transmitte
r, 3-wire
RTD or
resistance
transmitte
r, 4-wire
TC, voltage
transmitter,
internal CJ
TC, voltage
transmitter,
external CJ
RTD or resistance
transmitter, 2-
wire
  -  -
RTD or resistance
transmitter, 3-
wire
  -  -
RTD or resistance
transmitter, 4-
wire
- - - - -
TC, voltage
transmitter,
internal CJ
    -
TC, voltage
transmitter,
external CJ
  - - 
Internal and external cold junctions (CJ) are selectable reference junction measurements
for the connection of thermocouple sensors (TC).
• Internal CJ: the internal cold junction temperature is used.
• External CJ: an RTD resistance sensor Pt1000 must also be connected.
6.3.1 Connecting to push-in terminals
2.
3.
4.
5.
1.
2.
3.
AB
C
A0039468
 7 Connecting to push-in terminals
Fig. A, solid wire:
1. Strip wire end. Min. stripping length 10 mm (0.39 in).
2. Insert the wire end into the terminal.
3. Pull the wire gently to ensure it is connected correctly. Repeat from step 1 if
necessary.

iTEMP TMT86 Electrical connection
Endress+Hauser 19
Fig. B, fine-strand wire without ferrule:
1. Strip wire end. Min. stripping length 10 mm (0.39 in).
2. Press down on the lever opener.
3. Insert the wire end into the terminal.
4. Release lever opener.
5. Pull the wire gently to ensure it is connected correctly. Repeat from step 1 if
necessary.
Fig. C, releasing the connection:
1. Press down on the lever opener.
2. Remove the wire from the terminal.
3. Release lever opener.
6.4 Ensuring the degree of protection
Compliance with the following points is mandatory following installation in the field or
servicing in order to ensure that IP67 protection is maintained:
• The transmitter must be mounted in a terminal head with the appropriate degree of
protection.
• The housing seals must be clean and undamaged when inserted into their grooves. The
seals must be dried, cleaned or replaced if necessary.
• The connecting cables used must have the specified external diameter (e.g. M20x1.5,
cable diameter 8 to 12 mm).
• Firmly tighten the cable gland. →  8,  19
• The cables must loop down before they enter the cable glands ("water trap"). This means
that any moisture that may form cannot enter the gland. Install the device in such a way
that the cable glands are not facing upwards. →  8,  19
• Replace unused cable glands with dummy plugs.
• Do not remove the grommet from the cable gland.
A0024523
 8 Connection tips to retain IP67 protection
6.5 Post-connection check
Device condition and specifications Notes
Is the device or cable undamaged (visual check)? --
Electrical connection Notes
Does the port classification match the information on
the nameplate?
Compare the port classification with the information
on the nameplate
Do the cables used meet the required specifications? Fieldbus cable,
Sensor cable, →  17
Are the mounted cables relieved of tension? --

Operation options iTEMP TMT86
20 Endress+Hauser
Device condition and specifications Notes
Are the power supply and signal cables connected
correctly?
→  15
Are all the screw terminals firmly tightened and have
the push-in terminal connections been checked?
→  18
Are all the cable entries mounted, tightened and leak-
tight?
Cable run with "water trap"?
--
Are all housing covers installed and firmly tightened? --
Electrical connection of the fieldbus system Notes
Are all connecting components (switch, device
connector, etc.) correctly connected to each other?
--
Does the max. length of the fieldbus cable comply with
the fieldbus specifications?
For more information, see www.ethernet-apl.org
"Ethernet-APL Engineering Guideline"
Does the max. length of the spurs match the fieldbus
specifications?
Is the fieldbus cable fully shielded and correctly
grounded?
7 Operation options
7.1 Overview of operation options
1
5
2 43
A0048408
1 Local operation via DIP switch on display module
2 Computer with web browser or with operating tool (e.g. FieldCare, DeviceCare, SIMATIC PDM)
3 Field Xpert SMT70
4 Control system (e.g. PLC)
5 Temperature transmitter
There are different ways in which the operator can configure and commission the device:
1. Miniature switches (DIP switches) for various hardware settings, optional
→  22
You can make the following hardware settings via DIP switches positioned on the rear of
the optional display:
• switch the hardware write protection on/off
• rotate the display 180 °
• activate the service IP address 192.168.1.212