Endress+Hauser iTEMP TMT85 Operating Instructions Manual

BA00251R/09/EN/14.13
71209223

Device software

02.00

Products Solutions Services

Operating instructions

iTEMP® TMT85

Temperature head transmitter
with FOUNDATION Fieldbus™ - protocol

9

Brief overview

For quick and easy 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

manufacturers.

Information about setting the hardware write protection, device

address, etc. for FOUNDATION Fieldbus communication

Æ

Commissioning → Page 27

Commissioning via the FOUNDATION Fieldbus interface - quick start

for device configuration for standard operation

Customer-specific configuration → Page 52

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.

Endress+Hauser

TMT85

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 . . . . . . . . . . . . . . . . . . . . . 12

4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1 Quick wiring guide . . . . . . . . . . . . . . . . . . . . . . . . 13

4.2 Connecting the sensor cables . . . . . . . . . . . . . . . 14

4.3 FOUNDATION Fieldbus™ cable specification . . 15

4.4 Connecting the measuring unit . . . . . . . . . . . . . . 18

4.5 Post-connection check . . . . . . . . . . . . . . . . . . . . . 20

10 Technical Data. . . . . . . . . . . . . . . . . . . . 43

11 Operation via FOUNDATION Fieldbus™ .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

5 Operation. . . . . . . . . . . . . . . . . . . . . . . . . 21

5.1 Quick operation guide . . . . . . . . . . . . . . . . . . . . . 21

5.2 Display and operating elements . . . . . . . . . . . . . 22

5.3 FOUNDATION Fieldbus™ technology . . . . . . . . . 22

5.4 Configuration of the transmitter and FF functions
26

5.5 Hardware settings (optional) . . . . . . . . . . . . . . . . 26

6 Commissioning. . . . . . . . . . . . . . . . . . . . 27

6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.2 Switching on the measuring device . . . . . . . . . . 27

6.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7 Maintenance. . . . . . . . . . . . . . . . . . . . . . 33

8 Accessories . . . . . . . . . . . . . . . . . . . . . . . 33

9 Troubleshooting. . . . . . . . . . . . . . . . . . .34

9.1 Troubleshooting instructions . . . . . . . . . . . . . . . . 34

9.2 Status messages . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.3 Application errors without messages . . . . . . . . . 40

9.4 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.5 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.7 Software history and overview of compatibility 42

Endress+Hauser 3

Safety instructions TMT85

NOTICE

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 connection head form B according to DIN EN50446.

• 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.
The documentation number of that document (XA...) is also indicated on the nameplate.

Electromagnetic compatibility

The measuring 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.

Power supply

‣ 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.

4 Endress+Hauser

TMT85 Safety instructions

1.4 Notes on safety conventions and icons

Always refer to the safety instructions in these Operating Instructions labeled with the
following symbols:

Symbol Meaning

WARNING!

A0011190-EN

A0011191-EN

A0011192-EN

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.

ESD - Electrostatic discharge
Protect the terminals against electrostatic discharge. Failure to comply with
this instruction can result in the destruction of parts or malffunction of the
electronics.

Indicates additional information, Tip

A0011193

Endress+Hauser 5

Identification TMT85

2 Identification

2.1 Device designation

2.1.1 Nameplate

The right device?

Compare the nameplate on the device with the following graphic:

A0008278

Fig. 1: Nameplate of the head transmitter (example)

1 Device identification number (Device_ID)
2 Power supply and extended order code
3 Serial number and FW release
4 Approvals with symbols
52D barcode
6Tag name (TAG)
7 Approval in hazardous area with number of the relevant Ex documentation (XA...)
8Order code

2.2 Scope of delivery

The scope of delivery of the device comprises:

• Temperature head transmitter

•Securing material

• Multi-language 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 (

2 1

), such as Safety Instructions (XA...), Control or Installation Drawings (ZD...).

0

2.3 Certificates and approvals

The device is designed in accordance with good engineering practice to meet state-of-the­art safety requirements, has been tested and left the factory in a condition in which it is safe
to operate. 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 described in these Operating Instructions is therefore in conformity with the
statutory requirements of the EU Directives. The manufacturer confirms a positive
completion of all tests by fitting the unit with a CE mark.

6 Endress+Hauser

TMT85 Identification

2.3.2 Certification Foundation Fieldbus™

The temperature transmitter has successfully passed all the tests and is certified and
registered by the Fieldbus Foundation. The device meets all the requirements of the
following specifications:

• Certified in accordance with FOUNDATION Fieldbus™ specification

• FOUNDATION Fieldbus™ H1

• Interoperability Test Kit (ITK), (device certification number available on request): the
device may also be operated using certified devices from other manufacturers

• Physical Layer Conformance Test of the Fieldbus FOUNDATION™

An overview of additional approvals and certifications can be found on → ä 50.

2.4 Registered trademarks

FOUNDATION Fieldbus
Registered trademark of the Fieldbus Foundation Austin, Texas, USA

TM

Endress+Hauser 7

Installation instructions TMT85

NOTICE

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 EN50446, direct mounting on insert with cable
entry (middle hole 7 mm)

• In the field housing, separate from the process (see Section 8 'Accessories')

• Mounting on a DIN rail as per EN 60715 is also possible with the DIN rail clip accessory,
see Section 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.

Damage of the head transmitter

‣ Do not overtighten the mounting screws as this could damage the head transmitter.

Maximum torque = 1 Nm (¾ pound-feet).

8 Endress+Hauser

TMT85 Installation instructions

3.3.1 Mounting typical of Europe

A0008281-EN

Fig. 2: Head transmitter mounting (three versions)

Item A Mounting in a terminal head (terminal head as per DIN EN50446, flat face)

1Terminal head

2 Circlips

3Insert

4 Connection wires

5 Head transmitter

6 Mounting springs

7Mounting screws

8 Terminal head cover

9Cable entry

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 section 4), close the terminal head cover (8) back on tight.

Endress+Hauser 9

Installation instructions TMT85

1

234 5

6

5

6

Item B Mounting in a field housing

1 Field housing cover

2 Mounting screws with springs

3 Head transmitter

4 Field housing

Procedure:

1. Open the cover (1) of the field housing (4).

2. Guide the mounting screws (2) through the lateral bores of the head transmitter (3).

3. Screw the head transmitter to the field housing.

4. When wiring is complete (see section 4), screw the field housing cover (1) back on.

Item C Mounting on DIN rail as per IEC 60715

1 Mounting screws with springs

2 Head transmitter

3 Circlips

4DIN rail clip

5DIN rail

Procedure:

1. Press the DIN rail clip (4) onto the DIN 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).

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

10 Endress+Hauser

TMT85 Installation instructions

NOTICE

Thermometer design with thermocouples or RTD sensors and head transmitter

→ å 3)

(

• Fit the thermowell (item 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 (item 3) on the thermowell.

• Make sure sealing rings are installed if such rings are needed for harsh environmental
conditions or special regulations.

• Guide the mounting screws (item 6) through the lateral bores of the head transmitter
(item 7).

• Position the head transmitter (item 5) in the terminal head (item 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 (item 5) in the terminal head (item

4).

• Guide the connection wires of the insert (item 3) through the lower cable entry of the
terminal head (item 4) and through the middle hole in the head transmitter (item 5). Wire
the connection wires and transmitter (see Section 4) with one another.

• Screw the terminal head (item 4), with the integrated and wired head transmitter, onto
the ready-mounted nipple and adapter (item 3).

Requirements for explosion protection

‣ Once the wiring is completed, screw the terminal head cover back on. The terminal head

cover must be secured properly.

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

The display can only used with the suitable Endress+Hauser terminal heads TA30
and caps with display window.

Endress+Hauser 11

Installation instructions TMT85

3.4 Post-installation check

After installing the device, always run the following final checks:

Device condition and specifications Notes

Is the device visibly damaged (visual check)? -

Does the device comply to the measurement point specifications, such as
ambient temperature, measurement range etc.?

See chapter 10 "Technical data"

12 Endress+Hauser

TMT85 Wiring

NOTICE

-

+

+

1

-

2

7

6

5

4

3

1

2

7

6

5

4

3

Sensor input 2

Sensor input 1

Bus connection

and supply voltage

Display connection/
service interface

TC, mV

RTD, 4-, 3- and 2-wire:Ω

RTD, 3- and 2-wire:Ω

TC, mV

white

red

red

white

white

red

red

(black)

(yellow)

(black)

4 Wiring

Electronic parts may be damaged

‣ 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.

‣ The 4-pin post connector is only designed for connecting the associated display.

Connecting other devices can destroy parts of 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 → å 5. 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 section

connection check!

4.1 Quick wiring guide

Terminal assignment

Fig. 5: Wiring the head transmitter

ESD - electrostatic discharge
Protect the terminals from electrostatic discharge. Failure to observe this may result in

Endress+Hauser 13

destruction or malfunction of parts of the electronics.

A0007285-EN

Wiring TMT85

ABCD

4.2 Connecting the sensor cables

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. In this
situation, the sensors have to 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.

Please refer to → å 5 for the terminal assignment of the sensor connections.

The following connection combinations are possible when both sensor inputs are assigned:

Sensor input 1

Sensor
input 2

RTD or resistance
transmitter, two-wire

RTD or resistance
transmitter, three­wire

RTD or resistance
transmitter, four-wire

Thermocouple (TC),
voltage transmitter

RTD or
resistance
transmitter,
two-wire

  - Â

  - Â

----

   Â

RTD or
resistance
transmitter,
three-wire

RTD or
resistance
transmitter,
four-wire

Thermocouple
(TC), voltage
transmitter

4.2.1 Connecting to spring terminals

Fig. 6: Spring terminal connection

A Insert wire end (solid wire or wire with ferrule)
B Insert wire end (fine-strand wire without ferrule)
C Release wire end with tool
D Remove wire end

When connecting flexible cables and spring terminals, it is not recommended to use ferrules.

A0008322

14 Endress+Hauser

TMT85 Wiring

Procedure:

Item A, solid wire: 1. Strip wire end. Minimum stripping length = 10 mm (0.39 in)

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 = 10 mm (0.39 in)

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.

Item C and D, releasing the connection: 1. Operate lever opener with tool (C).

2. Remove wire from terminal (D).

3. Release lever opener.

4.3 FOUNDATION Fieldbus™ cable specification

4.3.1 Cable type

Twin-core cables are required for connecting the device to the FOUNDATION Fieldbus™ H1.
Following IEC 61158-2 (MBP), four different cable types (A, B, C, D) can be used with the
FOUNDATION 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 field buses
(same degree of protection) 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 described in the standard.

The electrical data of the fieldbus cable have not been specified but determine important
characteristics of the design of the fieldbus, such as distances bridged, number of users,
electromagnetic compatibility, etc.

Type A Type B

Cable structure Twisted pair, shielded One or more twisted pairs, fully

shielded

Wire size 0.8 mm

Loop-resistance (direct current) 44 Ω/km 112 Ω/km

Characteristic impedance at

31.25 kHz

Attenuation constant at 39 kHz 3 dB/km 5 dB/km

Capacitive asymmetry 2 nF/km 2 nF/km

2

(AWG 18) 0.32 mm2 (AWG 22)

100 Ω ± 20% 100 Ω ± 30%

Endress+Hauser 15

Wiring TMT85

Type A Type B

Envelope delay distortion (7.9 to
39 kHz)

Shield coverage 90% *

Max. cable length (incl. spurs >1 m)1900 m (6233 ft) 1200 m (3937 ft)

* Not specified

1.7 ms/km *

Suitable fieldbus cables (type A) from various manufacturers for non-hazardous areas are
listed below:

• Siemens: 6XV1 830-5BH10

• Belden: 3076F

• Kerpen: CeL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL

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/3.28 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 repeaters 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/3.28 ft):

Number of spurs 1 to 12 13 to 14 15 to 18 19 to 24 25 to 32

Max. length per spur 120 m (393

ft)

90 m (295

ft)

60 m (196

ft)

30 m (98 ft) 1 m (3.28 ft)

4.3.4 Number of field devices

In accordance with IEC 61158-2 (MBP), a maximum of 32 field devices can be connected per
fieldbus segment. However, this number is restricted under certain conditions (explosion
protection, bus power option, field device current consumption). A maximum of four field
devices can be connected to a spur.

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.

16 Endress+Hauser

TMT85 Wiring

NOTICE

To comply with both requirements, the FOUNDATION Fieldbus™ 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. 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 possible with one-sided shielding.
Where applicable, national installation regulations and guidelines must be observed during
the installation!
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, → å 7

A0008770

Fig. 7: Shielding and one-sided grounding of the fieldbus cable shielding

1 Supply unit
2 Distribution box (T-box)
3Bus terminator
4 Grounding point for fieldbus cable shielding
5 Optional grounding of the field device, isolated from cable shielding.

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 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.

Endress+Hauser 17

Wiring TMT85

NOTICE

4.3.7 Further information

General information and further pointers on wiring can be found on www.fieldbus.org, the
Web site of the Fieldbus Foundation or in the Operating Instructions "FOUNDATION
Fieldbus™ Overview" which can also be found on the CD-ROM. (Additional sources: →
www.endress.de → Download).

4.4 Connecting the measuring unit

Devices can be connected to the FOUNDATION Fieldbus™ 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

Risk of damaging

‣ 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.

‣ 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 measuring device, the bus communication will have to be
interrupted.

4.4.1 Cable glands or entries

Please also observe the general procedure on → ä 13.

A0008284

Fig. 8: Connection to the FOUNDATION Fieldbus™ fieldbus cable - installed in the field housing on the left, and in the terminal

1 FF terminals - fieldbus communication and power supply
2 Inner ground terminal
3Outer ground terminal
4 Shielded fieldbus cable (FOUNDATION Fieldbus™)

head on the right

• The terminals for the fieldbus connection (1+ and 2-) are not polarity sensitive.

• Conductor cross-section:

2

max. 2.5 mm
max. 1.5 mm

for screw terminals

2

for spring terminals

• A shielded cable must be used for the connection.

18 Endress+Hauser

TMT85 Wiring

190 mm (7.48 in)

26.5 mm

(1.040 in)

M20x1.5 /
NPT 1/2”

7/8-16 UNC

A

B

4

1

2

C

3

5

6

4.4.2 Fieldbus connector

Optionally, a fieldbus connector can be screwed into the terminal head or field housing
instead of a cable gland. Fieldbus connectors can be ordered from Endress+Hauser as an
accessory (see Section 8 'Accessories').

The connection technology of FOUNDATION Fieldbus™ allows measuring 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.

• 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.

A0008283

Fig. 9: Connectors for connecting to the FOUNDATION Fieldbus™

A Fieldbus connector (pin assignment/color codes)

– 1 Blue wire: FF– (terminal 2)
– 2 Brown wire: FF+ (terminal 1)
– 3 Gray wire: shielding
– 4 Green/yellow wire: ground
– 5 Positioning tappet

– 6 7/8" UNC thread
B Terminal head thermometer
C Connector at the housing (male)

Connector technical data:

Wire cross-section 4 x 0.8 mm2

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 mΩ
Insulation resistance ≥ 109 Ω

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Wiring TMT85

4.5 Post-connection check

After the electrical installation of the device, always perform the following final checks:

Device condition and specifications Notes

Are the measuring device or the cables damaged (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, → ä 15

Sensor cable, → ä 14

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?

Are all the cable entries installed, tightened and sealed?
Cable run with "water trap"?

Are all the housing covers installed and tightened?

Electrical connection of FOUNDATION Fieldbus™ 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 FOUNDATION Fieldbus™ specifications?

FOUNDATION Fieldbus™ specifications?

Is the fieldbus cable fully shielded (90%) and correctly grounded?

→ ä 14

-

-

→ ä 15Has the max. length of the spurs been observed in accordance with the

20 Endress+Hauser

TMT85 Operation

5Operation

5.1 Quick operation guide

Display and operating elements are only available locally if the head transmitter was
ordered with a display unit!

You have a number of options for configuring and commissioning the device:

1. Configuration programs

The configuration of FF functions and device-specific parameters is done via the fieldbus
interface. You can obtain special configuration and operating programs from various
manufacturers for these purposes.→ ä 26

2. Miniature switches (DIP switches) for diverse hardware settings, optional

You can make the following hardware settings for the FOUNDATION Fieldbus™ interface
using miniature switches (DIP switches) on the rear of the optional display → ä 26:

• Enabling/disabling the simulation mode in the Analog Input function block

• Switching the hardware write protection on/off

• Switching (turning) the display 180 °

Fig. 10: Head transmitter operating options

1 Configuration/operating programs for operation via FOUNDATION Fieldbus™ (Foundation Fieldbus functions, device

parameter)
2 DIP switch for hardware settings is on the rear of the optional display (write protection, simulation mode)

A0008323

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Operation TMT85

1

2

3
4
5

6

7

5.2 Display and operating elements

5.2.1 Display

A0008549

Fig. 11: Optional LC display of the head transmitter

5.2.2 Display symbols

Item

Function Description

No.

1 Displays the TAG TAG, 32 characters long.

2 'Communication' symbol The communication symbol appears when read and

3 Unit display Unit display for the measured value displayed.

4 Measured value display Displays the current measured value.

5 Channel display C1 or C2, P1, S1, RJ e.g. S1 for a measured value from sensor1.

6 'Configuration locked' symbol The 'configuration locked' symbol appears when

7 Warning or error message If a warning occurs, the display alternates between the

write-accessing via the FOUNDATION Fieldbus™
protocol.

configuration is locked via the hardware.

measured value and the warning code. If an error
occurs, the display alternates between the error code
and "- - - -" (no valid measured value available), (see
Section 9.2 'Status messages'.

5.2.3 Local operation

You can make hardware settings for the FOUNDATION Fieldbus™ interface using miniature
switches (DIP switches) on the rear of the optional display → ä 26:

5.3 FOUNDATION Fieldbus™ technology

The FOUNDATION Fieldbus™ (FF) is a purely digital, serial communication system that
connects fieldbus devices (sensors, actuators), automation and process control systems with
each other. As a local communications network (LAN) for field devices the FF was primarily
designed for the requirements of process technology. The FF thus forms the basic network
throughout the hierarchy of a communication system.
Please refer to Operating Instructions BA 013S/04/en “FOUNDATION Fieldbus Overview:
Installation and Commissioning Guidelines” for configuration information.

22 Endress+Hauser

TMT85 Operation

0 - 10 bar

0 - 10 bar

Visualisation and monitoring
e. g. P View, FieldCare
and diagnostic software

High speed Ethernet
(HSE) 100 Mbit/s

32 devices per segment

Field controller

linking
device

ENDRESS+HAUSER

ENDRESS+HAUSER

linking
device

linking
device

H1

31.25 kbit/s

H1 IEC 61158-2

H1 FISCO

Measuring point with

installed TMT85

Measuring point with

installed TMT85

5.3.1 System architecture

The following figure shows an example of a FOUNDATION Fieldbus™ network with the
associated components.

Fig. 12: System integration via FOUNDATION Fieldbus™

HSE = High Speed Ethernet, H1 = FOUNDATION Fieldbus-H1

The following system connection options are possible:
– A linking device can be used to connect to higher ranking fieldbus protocols (e.g. to the High Speed

– A H1 card is required for direct connection to a process control system.
– System inputs are available directly for H1 (HSE).

The system architecture of the FOUNDATION Fieldbus™ can be divided into two
subnetworks:

H1 bus system:

In the field, fieldbus devices are connected only via the slower H1 bus system that is specified
following IEC 61158-2. The H1 bus system allows simultaneous feed to the field devices and
data transfer on the two-wire line.
The following points describe some important characteristics of the H1 bus system:

• All fieldbus devices are powered via the H1 bus. Like the fieldbus devices, the power supply

• One of the most common network structures is the line structure. Star, tree or mixed

• The bus connection to the individual fieldbus devices is achieved by means of a T-

• The number of connected fieldbus devices depends on various factors, such as use in

• If using fieldbus devices in a hazardous area, the H1 bus must be equipped with an

• A bus terminator is required at each end of the bus segment.

A0007668-EN

Ethernet - HSE) (Control Net)

is connected in parallel to the bus line. Devices requiring external power must use a
separate power supply.

network structures are also possible using connecting components (junction boxes).

connector or via a spur. This has the advantage that individual fieldbus devices can be
connected or disconnected without interrupting the bus or the bus communication.

hazardous areas, length of spur, cable types, current consumption of field devices etc. (see
→ ä 15).

intrinsically safe barrier before the transition to the hazardous area.

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High Speed Ethernet (HSE):

The superior bus system is realized via the High Speed Ethernet (HSE) with a transmission
rate of max. 100 MBit/s. This serves as the 'backbone' (basic network) between various local
sub-networks and/or where there is a large number of network users.

Operation TMT85

5.3.2 Link Active Scheduler (LAS)

The FOUNDATION Fieldbus™ works according to the 'producer-consumer' relationship.
This provides various advantages.
Data can be directly exchanged between field devices, e.g. a sensor and an actuating valve.
Each bus user ’publishes’ its data on the bus and all the bus users configured accordingly
obtain this data. Publication of this data is carried out by a ’bus administrator’ known as the
’Link Active Scheduler’, which controls the sequence of bus communication centrally. The
LAS organizes all the bus activities and sends appropriate commands to the individual field
devices.

Other tasks of the LAS are:

• Recognition and reporting of newly connected devices.

• Reporting the removal of devices no longer communicating with the fieldbus.

• Keeping the ’Live List’. This list, in which all the fieldbus users are recorded, is checked by
the LAS regularly. If devices are logged on or logged off, the "Live List" is updated and sent
immediately to all the devices.

• Requesting process data from the field devices in accordance with a fixed schedule.

• Allocation of send rights (tokens) to devices between the untimed data transfer.

The LAS can be run redundantly, i.e. it exists both in the process control system and in the
field device. If one LAS fails, the other LAS can accurately take over communication. Through
precise timing of the bus communication via the LAS, the FF can run exact processes at
regular intervals.

Fi eld bus devi ces , suc h as thi s he ad t ran smi tte r, wh ich can tak e ov er t he L AS fu nct ion
in the event of failure of the primary master, are called 'Link Masters'. In contrast,
'Basic Devices' can only receive signals and send them to the central process control
system. The LAS function is deactivated in this head transmitter when the unit is
delivered.

5.3.3 Data transfer

We distinguish between two types of data transfer:

• Scheduled data transfer (cyclic): all time-critical process data (i.e. continuous
measurement or actuating signals) are transferred and processed in accordance with a
fixed schedule.

• Unscheduled data transfer (acyclic): device parameters that are not time-critical for the
process and diagnosis information are only transferred to the fieldbus when needed. This
data transfer is always carried out in the intervals between timed
communication.

5.3.4 Device ID, addressing

Within the FF network, each fieldbus device is identified by a unique device ID (DEVICE_ID).
The fieldbus host system (LAS) automatically gives the network address for this to the field
device. The network address is the address that the fieldbus currently uses.

The FOUNDATION Fieldbus™ uses addresses between 0 and 255:

• Groups/DLL: 0 to 15

• Devices in operation: 20 to 35

• Reserve devices: 232 to 247

• Offline/substitute devices: 248 to 251

The field device tag name (PD_TAG) is given to the device in question during commissioning
(see → ä 29). It remains stored in the device even during a supply voltage failure.

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TMT85 Operation

5.3.5 Function blocks

The FOUNDATION Fieldbus™ uses predefined function blocks to describe the functions of a
device and to specify uniform data access. The function blocks implemented in each fieldbus
device provide information on the tasks which a device can accept in the whole of the
automation strategy.

In the case of sensors these are typically the following blocks:

• ’Analog Input’ or

• ’Discrete Input’ (digital input)

Actuating valves normally have the function blocks:

• ’Analog Output’ or

• ’Discrete Output’ (digital output)

For control tasks there are the blocks:

• PD controller or

•PID controller

More information on this can be found from Section 11 onwards.

5.3.6 Fieldbus based process control

With the FOUNDATION Fieldbus™ field devices can carry out simple process control
functions themselves, thereby relieving pressure on the superior process control system.
Here the Link Active Scheduler (LAS) coordinates data exchange between the sensor and
controller and makes sure that two field devices cannot access the bus at the same time. To
do this, configuration software such as the NI-FBUS Configurator from National Instruments
is used to connect the various function blocks to the desired control strategy – generally
graphically (→ ä 29).

5.3.7 Device description

For commissioning, diagnosis and configuration, make sure that process control systems or
superior configuration systems can access all device data and that the operating structure is
uniform.
The device-specific information required for this is stored as so-called device description
data in special files (the ’Device Description’- DD). This enables the device data to be
interpreted and shown via the configuration program. The DD is thus a kind of ’device
driver’.
On the other hand, a CFF file (CFF = Common File Format) is required for the network
configuration in the OFF-line mode.
These files can be acquired as follows:

– Free of charge via the Internet: www.endress.com
– Via the Fieldbus Foundation Organization: www.fieldbus.org

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Operation TMT85

5.4 Configuration of the transmitter and FF functions

The FF communication system will only function properly if correctly configured. You can
obtain special configuration and operating programs from various manufacturers for the
configuration.
These can be used for configuring both the FF functions and all of the device-specific
parameters. The predefined function blocks allow uniform access to all the network and
fieldbus device data.
A detailed step-by-step description of the procedure for commissioning the FF functions is
given on → ä 29 together with information on configuring device-specific parameters.

System files

You require the following files for commissioning and configuring the network:

• Commissioning → device description (DD: *.sym, *.ffo, *.sy5, *.ff5)

•Network configuration → CFF file (Common File Format)

5.5 Hardware settings (optional)

DIP switches on the rear of the display are used to enable and disable hardware write
protection and the simulation mode (for the Analog Input Block), and to switch (turn) the
display 180°. When write protection is active, parameters cannot be modified. The current
write protection status is displayed in the WRITE_LOCK parameter (Resource Block, see
Section 11).
The simulation mode via the hardware setting must be changed before the software setting.
The display can optionally be ordered with the transmitter, or as an accessory for subsequent
mounting (see Section 8).

ESD - electrostatic discharge
Protect the terminals from electrostatic discharge. Failure to observe this may result in
destruction or malfunction of parts of the electronics.

To set the DIP switches, proceed as follows:

1. Open the cover of the terminal head or field housing.

2. Remove the attached display from the head transmitter.

3. Configure the DIP switch on the rear of the display accordingly. Switch to ON = function

enabled, switch to OFF = function disabled.

4. Fit the display onto the head transmitter in the correct position. The head transmitter

accepts the settings within one second.

5. Secure the cover back onto the terminal head or field housing.

The DIP switch settings are no longer valid as soon as the display is removed from
the head transmitter.

A0008326

Fig. 13: Hardware settings via DIP switches

1 Connection to head transmitter
2 DIP switch (1 - 7, SW/HW and ADDR ACTIVE), no function
3 DIP switch (SIM = simulation mode; WRITE LOCK = write protection; DISPL. 180° = switch (turn) the display 180°)

26 Endress+Hauser