Endress+Hauser iTEMP TMT84 User manual

BA00257R/09/en/02.11
71137264
Device software
01.01
Operating Instructions
iTEMP®TMT84
Temperature Head Transmitter
with PROFIBUS®PA Protocol
8

TMT84
2Endress+Hauser
Brief overview
For quick and straightforward commissioning:
Safety instructions Page 4
Æ
Installation instructions Page 8
Æ
Wiring Page 13
Æ
Display and operating elements Page 22
Information on configuration and operating programs from other manufac-
turers.
Information about setting the hardware write protection, device address, etc.
for PROFIBUS®PA communication
Æ
Commissioning Page 26
Commissioning using the PROFIBUS®PA interface - quick start for device
configuration for standard operation
Customer-specific configuration Page 53
Complex measurement tasks require additional functions to be configured
that the user can individually select, set and adapt to his process conditions
by setting the appropriate parameters.
A detailed description of all the functions and device parameters.

TMT84 Table of contents
Endress+Hauser 3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 4
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Installation, commissioning, operation . . . . . . . . . . . 4
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Notes on safety conventions and icons . . . . . . . . . . . 5
2 Identification . . . . . . . . . . . . . . . . . . . . 6
2.1 Device designation . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Certificates and approvals . . . . . . . . . . . . . . . . . . . . 6
2.4 Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . 7
3 Installation instructions . . . . . . . . . . . . 8
3.1 Incoming acceptance, transport, storage . . . . . . . . . . 8
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Installation instructions . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 11
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Quick wiring guide . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Connecting the sensor cables . . . . . . . . . . . . . . . . . 14
4.3 PROFIBUS® PA cable specification . . . . . . . . . . . . 15
4.4 Fieldbus connection . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 20
5 Operation . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Quick operation guide . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Display and operating elements . . . . . . . . . . . . . . . 22
5.3 Operating options . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.4 Hardware settings (optional) . . . . . . . . . . . . . . . . . 24
6 Commissioning. . . . . . . . . . . . . . . . . . 26
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2 Switching on the head transmitter . . . . . . . . . . . . . 26
6.3 Commissioning the PROFIBUS® PA interface . . . . 27
6.4 System integration . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5 Cyclical data exchange . . . . . . . . . . . . . . . . . . . . . 31
6.6 Acyclical data exchange . . . . . . . . . . . . . . . . . . . . . 34
7 Maintenance. . . . . . . . . . . . . . . . . . . . 34
8 Accessories. . . . . . . . . . . . . . . . . . . . . 35
9 Troubleshooting . . . . . . . . . . . . . . . . . 35
9.1 Troubleshooting instructions . . . . . . . . . . . . . . . . . 35
9.2 Displaying the device status on the PROFIBUS® PA . .
36
9.3 Status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9.4 Application errors without messages . . . . . . . . . . . 43
9.5 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.6 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.8 Firmware/software history and overview of
compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10 Technical data . . . . . . . . . . . . . . . . . . . 45
11 Operation using PROFIBUS® PA. . . . . 53
Index . . . . . . . . . . . . . . . . . . . . . . . . . .95

Safety instructions TMT84
4Endress+Hauser
1 Safety instructions
1.1 Designated use
• The device is a universal and configurable temperature head transmitter for resistance
thermometers (RTD), thermocouples (TC) and resistance and voltage transmitters. The device is
designed for installation in a terminal head form B according to DIN 43729 or field housing.
• The manufacturer cannot be held responsible for damage caused by misuse of the unit.
1.2 Installation, commissioning, operation
Please note the following:
• The device may only be installed, connected, commissioned and maintained by properly qualified
and authorized staff (e.g. electrical technicians) in strict compliance with these Operating
Instructions, applicable standards, legal regulations and certificates (depending on the
application).
• The specialist staff must have read and understood these Operating Instructions and must follow
the instructions they contain.
• The installer must ensure that the measuring system is correctly connected in accordance with
the electrical wiring diagrams.
• Damaged devices which could constitute a source of danger must not be put into operation and
must be clearly indicated as defective.
• Invariably, local regulations governing the opening and repair of electrical devices apply.
1.3 Operational safety
Please pay particular attention to the technical data on the nameplate! The nameplate is located on
the side of the transmitter housing.
Hazardous area
When using in hazardous areas, the national safety requirements must be met. Separate Ex
documentation is contained in these Operating Instructions for measurement systems that are to
mounted in hazardous areas. Strict compliance with the installation instructions, ratings and safety
instructions as listed in this supplementary documentation is mandatory. Ensure you are using the
correct Ex documentation for the relevant Ex-approved device. The number of the related Ex
documentation (XA...) is indicated on the nameplate. You can use this Ex documentation if the two
numbers (i.e. in the Ex documentation and on the nameplate) are identical.
Electromagnetic compatibility
The device meets the general safety requirements of EN 61010 and the EMC requirements of IEC/
EN 61326 as well as NAMUR recommendations NE 21 and NE 89.
#Warning!
Power must be fed to the device from an 9 to 32 VDC power supply in accordance with NEC
Class 02 (low voltage/current) with short-circuit power limit to 8 A/150 VA.

TMT84 Safety instructions
Endress+Hauser 5
1.4 Notes on safety conventions and icons
Always refer to the safety instructions in these Operating Instructions labeled with the following
symbols:
"Caution!
This symbol draws attention to activities or procedures that can lead to defective operation or to
destruction of the unit if not carried out properly.
#Warning!
This symbol draws attention to activities or procedures that can lead to injuries to persons, safety
risks or the destruction of the unit if not carried out properly.
!Note!
This symbol draws attention to activities or procedures that have an indirect effect on operation, or
can trigger an unforeseen unit reaction if not carried out properly.
ESD - Electrostatic discharge
Protect the terminals against electrostatic discharge. Failure to comply with this instruction can
result in the destruction of parts or malfunction of the electronics.

Identification TMT84
6Endress+Hauser
2 Identification
2.1 Device designation
2.1.1 Nameplate
The right device?
Compare and check the details on the device nameplate against the measuring point requirements.
a0009891
Fig. 1: Nameplate of the head transmitter (example, Ex version)
1 Power supply and extended order code
2 Serial number, device revision and firmware version
3 Approvals with symbols and 2D-barcode
4 2 lines for the TAG name
5 Approvals in hazardous area with number of the relevant Ex documentation (XA...)
6 Order code
2.2 Scope of delivery
The scope of delivery of the device comprises:
• Temperature head transmitter
• Securing material
• Multilingual hard copy of Brief Operating Instructions
• Operating Instructions and additional documentation on CD-ROM
• Additional documentation for devices that are suitable for use in hazardous areas (0 2 1),
such as Safety Instructions (XA...), Control or Installation Drawings (ZD...).
2.3 Certificates and approvals
On leaving the factory, the device was in perfect condition from the point of view of safety. The
device complies with the standards EN 61 010-1 "Protection Measures for Electrical Equipment for
Measurement, Control, Regulation and Laboratory Procedures" and with the EMC requirements of
IEC/EN 61326.
2.3.1 CE mark, declaration of conformity
The device meets the legal requirements of EU Directives. The manufacturer confirms a positive
completion of all tests by fitting the unit with a CE mark.
123
45
II3G Ex nA II T6/T5/T4 Ta= -40 ...+ 55/70/85°C
II3G Ex nL IIC T6/T5/T4 Ta= -40 ... +55/70/85°C
EH 08.001X
FNICO Apparatus
12345678910
Install per XA073/09/a3/01.08
9-32V
Suitable for Zone 22 when
install per XA074/09/a3/XX.XX
EH 08.002X
II3D Ex tD A22 IP54 T120°C
Made in Germany 2011
D-87484 Nesselwang
Ser.no.:
FW: X.XX.XX-[XXXXXXX
]
Input:
12345678ABCDEFGH
12345678ABCDEFGH
PROF I
BUS
PROCESS FIELDBUS
®
Profile: 3.02
iTEMP
®
TMT84-XXXXX/XX
2Dev.Rev.:
Ext. ord. cd.: XXXXX#
6

TMT84 Identification
Endress+Hauser 7
2.3.2 Certification PROFIBUS®PA
The temperature transmitter has successfully passed all test procedures and is certified and
registered by the PNO (PROFIBUS®user organization e.V.). The device thus meets all the
requirements of the specifications following:
• Certified according to PROFIBUS®PA Profile 3.02
• The device can also be operated with certified devices of other manufacturers (interoperability)
An overview of other approvals and certification can be found in chapter ’Technical data'.
2.4 Registered trademarks
•PROFIBUS
®
Registered trademark of the PROFIBUS Nutzerorganisation e.V. (Profibus User Organization),
Karlsruhe, Germany
•iTEMP
®
Registered trademark of Endress+Hauser Wetzer GmbH + Co. KG, Nesselwang, Germany

Installation instructions TMT84
8Endress+Hauser
3 Installation instructions
3.1 Incoming acceptance, transport, storage
3.1.1 Incoming acceptance
On receipt of the goods, check the following points:
• Are the contents or the packaging damaged?
• Is the delivery complete and is anything missing? Check the scope of delivery against you order.
3.1.2 Transport and storage
Note the following points:
• Pack the device in such a way as to protect it reliably against impact for storage (and
transportation). The original packaging provides optimum protection.
• The permitted storage temperature is -40 to +100 °C (-40 to 212 °F).
3.2 Installation conditions
3.2.1 Dimensions
The dimensions of the device can be found in chapter 10 ''Technical data''.
3.2.2 Installation point
• In the terminal head, flat face, as per DIN 43729, direct mounting on insert with cable entry
(middle hole 7 mm)
• In the field housing, separate from the process (see chapter 8 'Accessories')
!Note!
Mounting on a DIN rail as per EN 60715 is also possible with the DIN rail clip accessory,
see chapter 8 'Accessories'.
Information on installation conditions, such as ambient temperature, protection classification,
climatic class etc., can be found in chapter 10 "Technical data".
When using in the hazardous area, the limit values of the certificates and approvals must be
observed (see Safety Instructions XA or CD).
3.3 Installation instructions
A screwdriver is needed to mount the head transmitter.
"Caution!
Do not overtighten the mounting screws as this could damage the head transmitter. Maximum
torque = 1 Nm (¾ pound-feet).

TMT84 Installation instructions
Endress+Hauser 9
3.3.1 Mounting typical of Europe
a0014269-EN
Fig. 2: Head transmitter mounting (three versions)
1
2
3
4
5
6
7
9
8
12345
12345
Item A Item B
Item C
Item A Mounting in a terminal head, flat face (terminal head as per DIN 43729)
1 Terminal head
2 Circlips
3Insert
4Connectionwires
5 Head transmitter
6 Mounting springs
7 Mounting screws
8 Terminal head cover
9Cableentry
Procedure:
1. Open the terminal head cover (8).
2. Guide the connection wires (4) of the insert (3) through the middle hole in the head transmitter (5).
3. Fit the mounting springs (6) onto the mounting screws (7).
4. Guide the mounting screws (7) through the lateral bores of the head transmitter and the insert (3). Then fix both
mounting screws in position with the circlips (2).
5. Then screw down the head transmitter (5) to the insert (3) in the terminal head.
6. After wiring (see chapter 4), close the terminal head cover (8) back on tight.
Item B Mounting in a field housing
1 Field housing cover
2 Mounting screws with springs
3 Head transmitter
4 Circlips
5 Field housing

Installation instructions TMT84
10 Endress+Hauser
3.3.2 Mounting typical of North America
a0008520
Fig. 3: Head transmitter mounting
1 Thermowell
2 Insert
3: Adapter, threaded joint
4: Terminal head
5: Head transmitter
6: Mounting screws
Thermometer design with thermocouples or RTD sensors and head transmitter
• 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.
• Fit the necessary neck tube nipples and adapter (3) on the thermowell.
• Make sure sealing rings are installed if such rings are needed for harsh environmental conditions
or special regulations.
Procedure:
1. Open the cover (1) of the field housing (5).
2. Fit the mounting springs onto the mounting screws (2) and guide them through the lateral bores of the head
transmitter (3). Then fix both mounting screws in position with the circlips (4).
3. Screw the head transmitter to the field housing.
4. When wiring is complete (see chapter 4), screw the field housing cover (1) back on.
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
5DINrail
Procedure:
1. Press the DIN rail clip (4) onto the top-hat rail (5) until it engages.
2. Fit the mounting springs onto the mounting screws (1) and guide them through the lateral bores of the head
transmitter (2). Then fix both mounting screws in position with the circlips (3).
3. Screw the head transmitter (2) to the DIN rail clip (4).
Item B Mounting in a field housing

TMT84 Installation instructions
Endress+Hauser 11
• Guide the mounting screws (6) through the lateral bores of the head transmitter (7).
• 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.
• Using a screwdriver, screw down the head transmitter (5) in the terminal head (4).
• 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). Wire the connection wires and
transmitter (see chapter 4) with one another.
• Screw the terminal head (4), with the integrated and wired head transmitter, onto the ready-
mounted nipple and adapter (3).
"Caution!
Once the wiring is completed, screw the terminal head cover back on. The terminal head cover
must be secured properly to meet the requirements for explosion protection.
3.3.3 Mounting the display
1. Remove the screw from the terminal head. Open the terminal head cap (1).
2. Remove the cover of the display connection (2). Plug the display module onto the mounted
and wired head transmitter. The mounting pins (3) must snap securely into the head
transmitter.
3. After mounting the display, close the terminal head cap and refit the screw.
a0009852
Fig. 4: Mounting the display
!Note!
The display can only used with the suitable Endress+Hauser terminal heads TA30 and caps with
display window.
3.4 Post-installation check
After installing the device, always run the following final checks:
Device condition and specifications Notes
Is the device visibly free of damage (visual check)? -

Installation instructions TMT84
12 Endress+Hauser
Does the device comply to the measurement point specifications, such as
ambient temperature, measurement range etc.?
See chapter 10 "Technical data"

TMT84 Wiring
Endress+Hauser 13
4 Wiring
"Caution!
• Switch off power supply before installing or connecting the device. Failure to observe this may
result in destruction of parts of the electronics.
• When installing Ex-approved devices in a hazardous area please take special note of the
instructions and connection schematics in the respective Ex documentation added to these
Operating Instructions. The local E+H representative is available for assistance if required.
• Do not occupy the display connection. An incorrect connection can destroy the electronics.
For wiring a mounted head transmitter, proceed as follows:
1. Open the cable gland and the housing cover on the terminal head or the field housing.
2. Feed the cables through the opening in the cable gland.
3. Connect the cables as shown in å5. If the head transmitter is fitted with spring terminals,
please pay particular attention to Chap. 4.2.1.
4. Retighten the cable gland and close the housing cover.
5. In order to avoid connection errors always take note of the hints given in the chapter
connection check!
4.1 Quick wiring guide
Terminal assignment
a0007285-en
Fig. 5: Wiring the head transmitter
ESD - electrostatic discharge
Protect the terminals from electrostatic discharge. Failure to observe this may result in destruction
or malfunction of parts of the electronics.

Wiring TMT84
14 Endress+Hauser
4.2 Connecting the sensor cables
Please refer to Fig. 5 for the terminal assignment of the sensor connections.
"Caution!
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 be galvanically isolated from one
another by connecting each sensor separately to a transmitter. The device provides sufficient
galvanic isolation (> 2 kV AC) between the input and output.
The following connection combinations are possible when both sensor inputs are assigned:
4.2.1 Connecting to spring terminals
a0008322
Fig. 6: Spring terminal connection
Procedure:
Sensor input 1
RTD or
resistance
transmitter,
two-wire
RTD or
resistance
transmitter,
three-wire
RTD or
resistance
transmitter,
four-wire
Thermocouple
(TC), voltage
transmitter
Sensor
input 2
RTD or resistance
transmitter, two-wire   -
RTD or resistance
transmitter, three-wire   -
RTD or resistance
transmitter, four-wire ----
Thermocouple (TC),
voltage transmitter    
ABCD
Item A, Solid wire: 1. Strip wire end. Minimum stripping length = min. 10 mm (0.39").
2. Insert the wire end into the terminal (A).
3. Check the connection by pulling on the wire lightly. Repeat from step 1 if
necessary.
Item B
Fine-strand wire without ferrule:
1. Strip wire end. Minimum stripping length = min. 10 mm (0.39").
2. Operate lever opener with tool (B).
3. Insert the wire end into the terminal (B).
4. Release lever opener.
5. Check the connection by pulling on the wire lightly. Repeat from step 1 if
necessary.

TMT84 Wiring
Endress+Hauser 15
!Note!
When connecting flexible wires to spring terminals, it is not recommended to use ferrules.
4.3 PROFIBUS®PA cable specification
4.3.1 Cable type
Twin-core cables are required for connecting the device to the fieldbus. Following IEC 61158-2
(MBP), four different cable types (A, B, C, D) can be used with the fieldbus, only two of which (cable
types A and B) are shielded.
• Cable types A or B are particularly preferable for new installations. Only these types have cable
shielding that guarantees adequate protection from electromagnetic interference and thus the
most reliable data transfer. In the case of cable type B, several fieldbuses (same degree of protec-
tion) may be operated in one cable. No other circuits are permissible in the same cable.
• Practical experience has shown that cable types C and D should not be used due to the lack of
shielding, since the freedom from interference generally does not meet the requirements de-
scribed in the standard.
The electrical data of the fieldbus cable have not been specified but determine important character-
istics of the design of the fieldbus, such as distances bridged, number of users, electromagnetic com-
patibility, etc.
Suitable fieldbus cables from other manufacturers for non-hazardous areas are listed below:
• Siemens: 6XV1 830-5BH10
• Belden: 3076F
• Kerpen: CeL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL
Item C and D
Releasing the connection:
1. Operate lever opener with tool (C).
2. Remove wire from terminal (D).
3. Release lever opener.
Type A Type B
Cable structure Twisted pair, shielded One or more twisted pairs, fully
shielded
Wire size 0.8 mm2(AWG 18) 0.32 mm2 (AWG 22)
Loop-resistance (direct current) 44 /km 112 /km
Characteristic impedance at 31.25 kHz 100 ± 20% 100 ± 30%
Attenuation constant at 39 kHz 3 dB/km 5 dB/km
Capacitive asymmetry 2 nF/km 2 nF/km
Envelope delay distortion
(7.9 to 39 kHz)
1.7 ms/km *
Shield coverage 90% *
Max. cable length (incl. spurs >1m/3ft) 1900 m (6233 ft) 1200 m (3937 ft)
* Not specified

Wiring TMT84
16 Endress+Hauser
4.3.2 Maximum overall cable length
The maximum network expansion depends on the type of protection and the cable specifications.
The overall cable length combines the length of the main cable and the length of all spurs (>1 m/
3 ft). Note the following points:
• The maximum permissible overall cable length depends on the cable type used.
• If repeaters are used, the maximum permissible cable length is doubled. A maximum of three re-
peaters are permitted between user and master.
4.3.3 Maximum spur length
The line between the distribution box and field device is described as a spur.
In the case of non-Ex applications, the max. length of a spur depends on the number of spurs
(>1 m/3 ft):
4.3.4 Number of field devices
The line length is limited to a maximum of 1000m (3280ft) in systems corresponding to FISCO with
Ex ia types of protection. A maximum of 32 users per segment are permitted in the non-hazardous
area or 10 users in the hazardous area (Ex ia IIC). The actual number of users must be specified
during configuration.
4.3.5 Shielding and grounding
Optimum electromagnetic compatibility (EMC) of the fieldbus system can only be guaranteed if the
system components and, in particular, the lines are shielded and the shield forms as complete a
cover as possible. A shield coverage of 90% is ideal.
• To ensure an EMC protective effect, connect the shield as often as possible to the reference
ground.
• For reasons of explosion protection, you should refrain from grounding however.
To comply with both requirements, the fieldbus system basically allows three different types of
shielding:
• Shielding at both ends
• Shielding at one end on the feed side with capacitance connection to the field device
• Shielding at one end on the feed side
Experience shows that the best results with regard to EMC are achieved in most cases in
installations with one-sided shielding on the feed side (without capacitance connection to the field
device). Appropriate measures with regard to input wiring must be taken to allow unrestricted
operation when EMC interference is present. These measures have been taken into account for this
device. Operation in the event of disturbance variables as per NAMUR NE21 is thus guaranteed.
Where applicable, national installation regulations and guidelines must be observed during the
installation!
Type A 1900m 6200ft
Type B 1200m 4000ft
Number of spurs 1 to 12 13 to 14 15 to 18 19 to 24 25 to 32
Max. length per
spur
m 120 90 60 30 1
ft 400 300 200 100 3

TMT84 Wiring
Endress+Hauser 17
Where there are large differences in potential between the individual grounding points, only one
point of the shielding is connected directly with the reference ground. In systems without potential
equalization, therefore, cable shielding of fieldbus systems should only be grounded on one side, for
example at the fieldbus supply unit or at safety barriers, å7
a0008770
Fig. 7: Shielding and one-sided grounding of the fieldbus cable shielding
1 Supply unit
2 Distribution box (T-box)
3 Bus terminator
4 Grounding point for fieldbus cable shielding
5 Optional grounding of the field device, isolated from cable shielding.
"Caution!
If the shielding of the cable is grounded at more than one point in systems without potential
matching, power supply frequency equalizing currents can occur that damage the bus cable or
shielding or have a serious effect on signal transmission. In such cases the shielding of the fieldbus
cable is to be grounded on only one side, 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!
4.3.6 Bus termination
The start and end of each fieldbus segment are always to be terminated with a bus terminator. With
various junction boxes (non-Ex), the bus termination can be activated via a switch. If this is not the
case, a separate bus terminator must be installed. Note the following points in addition:
• In the case of a branched bus segment, the device furthest from the segment coupler represents
the end of the bus.
• If the fieldbus is extended with a repeater, then the extension must also be terminated at both
ends.
4.3.7 Further information
General information and further pointers on wiring can be found in the Operating Instructions
"Guidelines for Planning and Commissioning PROFIBUS®DP/PA - Field Communication"
(BA034S/04) which can also be found on the CD-ROM. (Additional sources: www.endress.com
Download).

Wiring TMT84
18 Endress+Hauser
4.4 Fieldbus connection
Devices can be connected to the fieldbus system in two ways:
• Connection via conventional cable gland Chap. 4.4.1
• Connection via fieldbus connector (optional, can be purchased as an accessory) Chap. 4.4.2
"Caution!
• Switch off power supply before installing or connecting the head transmitter. Failure to observe
this may result in destruction of parts of the electronics.
• Grounding via one of the grounding screws (terminal head, field housing) is recommended.
• Risk of damaging the fieldbus cable!
– If the shielding of the fieldbus cable is grounded at more than one point in systems without
additional potential matching, power supply frequency equalizing currents can occur that
damage the cable or the shielding. In such cases the shielding of the fieldbus cable is to be
grounded on only one side, 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 later
replace even just one device, the bus communication will have to be interrupted.
4.4.1 Cable glands or entries
!Note!
Please also observe the general procedure on ä13.
a0008284
Fig. 8: Connection to the fieldbus cable - installed in the field housing on the left, and in the terminal head on the right
A Fieldbus terminals - fieldbus communication and power supply
B Inner ground terminal
C Outer ground terminal
D Shielded fieldbus cable
!Note!
• The terminals for the fieldbus connection (1+ and 2-) are not polarity sensitive.
• Conductor cross-section:
– Max. 2.5 mm2(16 AWG) for screw terminals
– Max. 1.5 mm2(14 AWG) for spring terminals
• A shielded cable must be used for the connection.
4.4.2 Fieldbus connector
The connection technology of PROFIBUS®PA allows devices to be connected to the fieldbus via
uniform mechanical connections such as T-boxes, junction boxes, etc.
This connection technology using prefabricated distribution modules and plug-in connectors offers
substantial advantages over conventional wiring:
• Field devices can be removed, replaced or added at any time during normal operation.
Communication is not interrupted.

TMT84 Wiring
Endress+Hauser 19
• Installation and maintenance are significantly easier.
• Existing cable infrastructures can be used and expanded instantly, e.g. when constructing new
star distributors using 4-channel or 8-channel distribution modules.
Therefore, the device is optionally available with a fitted fieldbus connector ex works. Fieldbus
connectors for subsequent fitting can be ordered from Endress+Hauser as a spare part (see chapter
8 'Accessories').
Shielding the feed line/T-Box
Cable connections with good EMC properties must be used, preferably with wraparound cable
shielding (iris spring). This requires low potential differences, possibly potential equalization.
• The PA cable shielding must not be disconnected.
• The connection of the shielding must be kept as short as possible at all times.
Ideally, cable connections with iris springs should be used for connecting the shielding. The shield
is fitted on the T-box housing using the iris spring which is inside the connection. The shielding
meshwork is under the iris spring. When the Pg is screwed down, the iris spring is squeezed onto
the shield and thus creates a conductive connection between the shielding and the metal housing.
A terminal box or connection is to be seen as part of the shielding (Faraday cage). This is particularly
true for separate boxes if they are connected to a PROFIBUS®PA device with a plug-in cable. In
this case, a metallic connector must be used whereby the cable shielding is fitted at the connector
housing (e.g. pre-terminated cable).
a0009941
Fig. 9: Connectors for connection to the PROFIBUS®PA fieldbus
Pin assignment / color codes
DPlug 7/8": DPlug M12:
A Fieldbus connector 1 Brown wire: PA+ (terminal 1) 1 Grey wire: shield
B Field housing 2 Green-yellow wire: ground 2 Brown wire: PA+ (terminal 1)
C Connector at the housing
(male)
3 Blue wire: PA- (terminal 2) 3 Blue wire: PA- (terminal 2)
4 Grey wire: shield 4 Green-yellow wire: ground
5 Positioning tappet 5 Positioning tappet

Wiring TMT84
20 Endress+Hauser
Connector technical data:
4.5 Post-connection check
After the electrical installation of the device, always perform the following final checks:
Wire cross-section 4 x 0.8 mm
Connection thread M20 x 1.5 / NPT ½"
Degree of protection IP 67 as per DIN 40 050 IEC 529
Contact surface CuZn, gold-plated
Housing material 1.4401 (316)
Flammability V - 2 as per UL - 94
Ambient temperature –40 to +105 °C (–40 to +221 °F)
Current carrying
capacity
9 A
Rated voltage Max. 600 V
Contact resistance 5 m
Insulation resistance 109
Device condition and specifications Notes
Are the device or the cables free of damage (visual check)? -
Electrical connection Notes
Does the supply voltage match the specifications on the nameplate? 9 to 32 V DC
Do the cables used comply with the specifications? Fieldbus cable, ä15
Sensor cable, ä14
Do the cables have adequate strain relief? -
Are the power supply and signal cables correctly connected? Chap. 4.1
Are all the screw terminals well tightened and have the connections of the spring
terminals been checked?
ä14
Are all the cable entries installed, tightened and sealed?
Are all the housing covers installed and tightened?
Electrical connection of fieldbus system Notes
Are all the connecting components (T-boxes, junction boxes, connectors, etc.)
connected with each other correctly?
-
Has each fieldbus segment been terminated at both ends with a bus terminator? -
Has the max. length of the fieldbus cable been observed in accordance with the
fieldbus specifications?
ä15Has the max. length of the spurs been observed in accordance with the fieldbus
specifications?
Is the fieldbus cable fully shielded and correctly grounded?