Endress+Hauser iTEMP TMT125 User manual

BA240R/09/en/09.06
Device software
01.02.03
71033906
Operating Instructions
iTEMP®TMT125
Temperature transmitter with 8 input channels
and FOUNDATION Fieldbus™ protocol
9
1
CHANNEL ERROR
COM/
ERR 1:
2:
3-8: Not Used
Write Lock
Simulate Enable
PWR
23 567 84
Do not open !
CH1
87484 Nesselwang
Made in Germany 2006
0032
0123456789101
1019876543210
TMT125-XXXXXXXX
Ser.No.:
TAG No.:
Order Code:
TMT125
PTB 05 ATEX xxxxX
II 3G EEx nA II T4
II 3G EEx nL IIC T4
II (3)G [EEx nL] IIC T4
PTB 05 ATEX xxxx
II2 (1G/D)G EEx ia IIC T4
II(1) GD [EEx ia ] IIC
-40°C< Ta < 70°C
FISCO according to IEC TS 60079-27
DEVICE ID 452B4810CD-...
Avoid electrostatic charge!
inst. per XA056R/09/a3/XX.XX
-
LH
+
#

Brief Overview TMT125
2Endress+Hauser
Brief Overview
For quick and easy commissioning:
Safety instructions → page 4
Æ
Installation → page 7
Æ
Wiring → page 10
Æ
Display and operating elements → page 18
Æ
Commissioning → page 23
Device-specific parameters are configured and automation functions for
FOUNDATION Fieldbus™ are specified using configuration programs of
various manufacturers.
Æ
Customer-specific configuration/
Description of device functions
→ page 42
Complex measurement tasks require the configuration of additional func-
tions which you can individually select, set and adapt to your process condi-
tions using the relevant device parameters.

TMT125 Table of contents
Endress+Hauser 3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 4
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Installation, commissioning and 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
3 Mounting . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Incoming acceptance, transport, storage . . . . . . . . . . 7
3.2 Mounting conditions . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Mounting instructions . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Post-mounting check . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Quick wiring guide . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Connecting the device . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Fieldbus cable specifications . . . . . . . . . . . . . . . . . . 14
4.4 Potential equalization . . . . . . . . . . . . . . . . . . . . . . 16
4.5 Degree of protection . . . . . . . . . . . . . . . . . . . . . . . 16
4.6 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 17
5 Operation . . . . . . . . . . . . . . . . . . . . . 18
5.1 Quick operation guide . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Display and Operating elements . . . . . . . . . . . . . . . 18
5.3 FOUNDATION Fieldbus™ technology . . . . . . . . . . 19
5.4 Configuration of the temperature transmitter
and FF functions . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5 Hardware settings (DIP switches) . . . . . . . . . . . . . . 22
6 Commissioning . . . . . . . . . . . . . . . . . 23
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7 Maintenance . . . . . . . . . . . . . . . . . . . . 28
8 Accessories . . . . . . . . . . . . . . . . . . . . . 28
9 Troubleshooting . . . . . . . . . . . . . . . . 29
9.1 Troubleshooting instructions . . . . . . . . . . . . . . . . . 29
9.2 System error messages . . . . . . . . . . . . . . . . . . . . . . 30
9.3 Application errors without messages . . . . . . . . . . . . 34
9.4 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.5 Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.7 Software history . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10 Technical data . . . . . . . . . . . . . . . . . . 36
10.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.2 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10.4 Performance characteristics . . . . . . . . . . . . . . . . . . 38
10.5 Installation conditions . . . . . . . . . . . . . . . . . . . . . . 39
10.6 Environment conditions . . . . . . . . . . . . . . . . . . . . . 39
10.7 Mechanical construction . . . . . . . . . . . . . . . . . . . . 40
10.8 Certificates and approvals . . . . . . . . . . . . . . . . . . . . 41
10.9 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
11 Operation via
FOUNDATION Fieldbus™ . . . . . . . . 42
11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.2 Resource Block . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
11.3 Transducer blocks . . . . . . . . . . . . . . . . . . . . . . . . . 48
11.4 Analog Input function block (AI) . . . . . . . . . . . . . . 53
11.5 Multiple Analog Input function block (MAI) . . . . . . 59

1 Safety instructions TMT125
4Endress+Hauser
1 Safety instructions
1.1 Designated use
• The 8 channel device transfers signals from resistance temperature measuring sensors (RTD’s),
thermocouples (TC’s), resistance and millivolt signals via FOUNDATION Fieldbus™. Each chan-
nel could be configured independently.
• The device can be used for FOUNDATION Fieldbus™ H1 bus that use the physical layout in
accordance with IEC 61158-2/ISA-S50.02-1992.
• The manufacturer cannot be held responsible for damage caused by misuse of the unit. The device
can, however, be a source of danger if used incorrectly or for anything other than the designated
use.
1.2 Installation, commissioning and operation
Note the following points:
• 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 Instruc-
tions, 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 device may only be modified and repaired if such work is specifically permitted in the Oper-
ating Instructions.
• Damaged devices which could constitute a source a 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
• The device is designed to meet state-of-the-art safety requirements, has been tested and left the
factory in a condition in which it is safe to operate. Applicable regulations and European standards
have been taken into consideration.
• Please pay particular attention to the technical data on the nameplate! The nameplate is located
on the upper side of the device.
Hazardous areas
When using in hazardous areas, the national safety requirements must be met. Separate Ex docu-
mentation 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 device may be installed in category 2G (Zone 1) or category 3G (Zone 2) of a hazardous area.
• For category 2G (Zone 1) applications the type of protection is "Intrinsic Safety". The associated
field devices could operate in a category 1G (Zone 0) or category 1D (Zone 20) location.
• For category 3G (Zone 2) applications the type of protection is EEx n A. The device could be con-
nected to Non IS H1 segment. Independent of the type of protection of the H1 bus the inputs
remains intrinsically safe.
#Warning!
Devices that are operated in general electrical systems must not thereafter be operated in electrical
systems that are connected in hazardous areas.
Repairs
Repairs that are not described in the Operating Instructions may only be carried out directly at the
manufacturer's site or by the Service team.

TMT125 1 Safety instructions
Endress+Hauser 5
Electromagnetic compatibility
The measuring system complies with the general safety requirements in accordance with
IEC 61010 and the EMC requirements of IEC 61326 and NAMUR Recommendation NE 21.
"Caution!
Power must be supplied to the device from a 9 to 32 VDC power supply in accordance with NEC
Class 02 (low voltage/current) with short-circuit power limitation to 8 A/150 VA.
1.4 Notes on safety conventions and icons
Always refer to the safety instructions in these Operating Instructions labeled with the following
symbols:
#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.
"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.
!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 of the electronics.

2 Identification TMT125
6Endress+Hauser
2 Identification
2.1 Device designation
2.1.1 Nameplate
Compare the nameplate on the DIN rail or field housing device with the following graphic:
A0006759
Fig. 1: Nameplate of the temperature transmitter (DIN rail device as example)
A0006758
Fig. 2: Nameplate on the field housing (example)
1 Order code, serial number and TAG of device
2 Ambient temperature
3 Approvals with symbols
4 Sensor wiring diagram
5 Hazardous area approvals
6 Device ID number
2.2 Scope of delivery
The scope of delivery comprises:
• Temperature transmitter (as DIN rail adapter or attached in an aluminum field housing)
• Operating Instructions on CD-ROM
• Multi-language hard copy of Brief Operating Instructions
• Delivery note
• Safety Instructions for use in hazardous areas (Ex approval), on CD-ROM as well
2.3 Certificates and approvals
CE mark, declaration of conformity
The temperature transmitter is designed to meet state-of-the-art safety requirements, has been
tested and left the factory in a condition in which it is safe to operate. The device complies with the
applicable standards and regulations in accordance with IEC 61 010 “Safety Requirements for Elec-
trical Equipment for Measurement, Control and Laboratory Use”.
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.

TMT125 2 Mounting
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Device certification FOUNDATION Fieldbus™
The temperature transmitter has successfully passed all the test procedures implemented and has
been certified and registered by the FOUNDATION Fieldbus™. The measuring device thus meets
all the requirements of the following specifications:
• Certified to fieldbus specification, revision status 4.61
• Device certification number: IT035400
• The measuring device meets all the specifications of FOUNDATION Fieldbus-H1
(www.fieldbus.org).
• The measuring device may also be operated with certified devices from other manufacturers
(interoperability).
An overview of other approvals and certificates can be found in chapter ’Technical Data’ →
page 41.
3Mounting
3.1 Incoming acceptance, transport, storage
3.1.1 Incoming acceptance
After receiving the goods, check the following points:
• Is the packaging or the contents damaged?
• Is the delivery complete? Compare the goods delivered with what you ordered.
3.1.2 Transport and storage
Observe the following points:
• The unit must be packed in shockproof packaging for storage (and transport). The original pack-
aging offers the best protection for this.
• The permitted storage temperature is -40 to +80 °C (-40 to 176 °F)
3.2 Mounting conditions
3.2.1 Dimensions
The dimensions of the device can be found in chapter ’Technical Data’ → page 40.
3.2.2 Mounting point
Information on mounting conditions, such as ambient temperature, protection classification,
climatic class etc., can be found in chapter ’Technical Data’ → page 39.

2Mounting TMT125
8Endress+Hauser
3.3 Mounting instructions
Mounting must only be performed by specialist who are trained specifically for this purpose. Recog-
nized rules of the technology and setup requirements must be maintained during mounting and dis-
mounting. Especially for tasks on electrical systems, special safety requirements must be observed.
3.3.1 Mounting of the attached field housing transmitter
The field housing reaches the degree of protection IP 67. 2 screws with a diameter of 6 mm should
be used for mounting. The mounting material should be selected according to the nature of the sub-
surface (the wall). When selecting mounting material, care must be taken that it will ensure a secure
fastening.
A0006835
Fig. 3: Field housing mounting
A Mounting holes for fixing with screws M6
B Earthing point

TMT125 2 Mounting
Endress+Hauser 9
3.3.2 Mounting of the DIN rail transmitter
The DIN rail transmitter is designed for mounting on a 35 mm DIN rail in accordance with
IEC 60715 and must be protected against electrostatic discharge.
The Device must be mounted inside a housing that corresponds to at least degree of protection:
• IP 20 in accordance with IEC 60529 or higher for category 2G (Zone 1) application. The housing
must be suitable for this application.
• IP 54 in accordance with IEC 60529 or higher for category 3G (Zone 2) application. The housing
must be suitable for this application.
"Caution!
Plastic housing must be designed in accordance with IEC 60079-0 or need to be protected against
electrostatic discharge.
Now snap the device onto the DIN rail by firstly hanging the device on the DIN rail and then press-
ing it down gently until it engages ( → fig. 4, item 1 and 2).
A0006837
Fig. 4: DIN rail transmitter mounting
A: 35 mm DIN rail according to IEC 60715
3.4 Post-mounting check
After mounting the device, always run the following final checks:
Device condition and specifications Notes
Has the device been mounted in accordance with specifications? -
Is the device free of damage? -
Is IP protection ensured? -
Are the mounting screws (field housing) tightened securely? -

4 Wiring TMT125
10 Endress+Hauser
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.
!Note!
When installing intrinsically safe fieldbus segments, EN 60079-14/IEC 60079-14 must be
observed. For the Federal Republic of Germany, the "National Foreword“ of
DIN EN 60079-14/VDE 0165 Part 1 must also be observed.
4.1 Quick wiring guide
Terminal assignment
A0006330-en
Fig. 5: Terminal assignment of the temperature transmitter
#ESD - Electrostatic discharge
Protect the terminals from electrostatic discharge. Failure to observe this may result in destruction
of parts of the electronics.
The following identifying values must be observed when connecting fieldbus transmis-
sion lines:
• The insulating length of the wire is 9 mm (0.35“).
• Wire cross-section 0.2 mm² to 2.5 mm² or AWG 24 to 14.
• If a cable, consisting of fine wire is in use, the ends of the leads must be protected (e. g. with core
cable ends).
• Tightening torque of the screw terminals (if present) 0.4... 0.5 Nm.
• If a Thermocouple is connected to the terminals H and L of the transmitter, it is not allowed to
connect something to the terminals + and -.
• A fieldbus transmission line with an insulation voltage between the bus line and shield of at least
500 V must be used for intrinsically safe fieldbus segments.

TMT125 4 Wiring
Endress+Hauser 11
!Note!
The service interface ( → fig. 9) is for parameterization only. It fulfills the type of protection EEx
ia IIC/IIB resp. EEx ib IIC/IIB with the following values:
!Note!
Tasks for parameterization via the service interface must only be performed by E+H service only!
4.2 Connecting the device
4.2.1 Cable glands or entries
• If the device has not been grounded as a result of the housing being installed, we recommend
grounding it via one of the ground screws. Observe the grounding concept of the plant! Between
the stripped fieldbus cable and the ground terminal, the cable shielding should be kept as short as
possible.
• Risk of damaging the fieldbus cable!
– If the shielding of the fieldbus cable is grounded at more than one point in systems without addi-
tional 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. 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.
!Note!
• The terminals for the fieldbus connection have an integral polarity protection.
– Cable cross-section: max. 2.5 mm2
• A shielded cable must be used for the connection.
Tightening torques of the screwed connection of cable glands (field housing):
The tightening torques of cap nuts depend on what type of cable is used and must therefore be
determined by the user. The cap nuts must be securely tightened. Tightening the cap nuts too tight
can have a negative effect on the protection method. The following specification should be taken as
rough guides:
Only permanently laid cables and lines must be inserted into the cable glands. The permissible cable
diameters can be found in chap. ’Technical Data, → page 38. The operator must provide an appro-
priate strain-relief clamp (for example with a suitable cable clamp). The mounting notes in →
chap. 3.3 must be observed. Cable glands that are not in use must be closed off with a corresponding
stop plug or replaced by an appropriate screw plug. The required degree of protection (IP 67) must
be observed.
!Note!
The ambient temperature range can be restricted by the stop plug. For examples of stop plugs and
screw plugs, please refer to the respective data sheets.
UO= 7.2 V Characteristic curve: linear
IO= 29.1 mA Only for connection of intrinsically safe circuits
PO= 52.38 mW Ui= 5 V
Li= 0
Ci= 0
Type Cap nut Lower part
Temperature transmitter attached in
field housing
4.17 Nm 6.25 Nm

4 Wiring TMT125
12 Endress+Hauser
!Note!
For metal housings in hazardous areas, a suitable potential equalization in accordance with
IEC 60 079 is required. A grounding screw is provided on the housing for this purpose
( → fig. 3, item B). The connection must be designed to prevent self locking and must be protected
against corrosion. Protection against corrosion can also be achieved by using tinned cable plates, for
example.
!Note!
Before closing the cover, a visual inspection must be performed to ensure that there are no visible
signs of damage on the cover seal. In the event of damage, the seal must be replaced by an original
seal. The screws on the cover should be tightened to a torque of 2.5 Nm.
Handling the cable gland
T09-TMT125FF-04-xx-xx-xx-000
Fig. 6: Handling the cable gland
Pos. A: Inside plastic part
Pos. B: O-ring
1. Insulate the covering of the cable up to about 120 mm (4.7“).
2. Loosen the cap nuts from the field housing and push it onto the cable.
3. Remove the inside plastic part as well and push it onto the cable. Move the inside plastic part
far enough over the cable that the covering is completely surrounded. The covering must not
stand out over the end of the inside plastic part.
4. Pull the shield over the inside plastic part and shorten it to the correct length. The shield should
protrude about 3 to 4 mm (0.12 to 0.16“) beyond the O-ring.
5. Insert the cable with the inside plastic part into the lower part of the cable gland.
6. Then tighten the cap nut. The tightening torques of cap nuts depend on what type of cable is
used and must therefore be determined by the user. As rough guide you may use 4.17 Nm for
the cap nut and 6.25 Nm for the lower part.
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TMT125 4 Wiring
Endress+Hauser 13
4.2.2 Fieldbus connector
The connection technology of FOUNDATION Fieldbus™ allows measuring devices to be con-
nected to the fieldbus via uniform mechanical connections such as T-boxes, distribution modules,
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. Commu-
nication 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.
The device can therefore be supplied with the option of a fieldbus connector. The fieldbus connector
is supplied pre-assembled and wired ex works. Fieldbus connectors for retrofitting can be ordered
from Endress+Hauser as an accessory ( → chap. 8).
Supply line/T-box shielding
Use cable glands with good EMC properties, if possible with all-round contact of the cable shielding
(Iris spring). This requires small differences in potential, poss. potential matching.
• The fieldbus cable shielding must be intact.
• The shielding connection must always be kept as short as possible.
Ideally, cable glands with Iris springs should be used for the shielding connection. The shielding is
connected to the T-box housing by means of the Iris spring located inside the gland. The shielding
braid is located beneath the Iris spring. When the armored thread is tightened, the Iris spring is
pressed against the shielding, thereby creating a conductive connection between the shielding and
the metal housing.
A connection box or a plug-in connection is to be seen as part of the shielding (Faraday shield). This
applies, in particular, to remote boxes if these are connected to a FOUNDATION Fieldbus™ mea-
suring device by means of a pluggable cable. In such instances, a metallic connector must be used
where the cable shielding is positioned at the plug housing (e.g. prefabricated cables).
T09-TMT125FF-04-xx-xx-xx-001
Fig. 7: 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 Grey wire: Shielding
4 Green-yellow wire: Ground
B Field housing
If the transmitter was ordered attached in the field housing with fieldbus connector (order code -
housing: position 3) it is supplied with the fieldbus connector pre-assembled and wired ex works.
Shielding and ground (pin 3 and 4) are connected to the terminal S of the intrinsically safe fieldbus
segment ( → fig. 5).

4 Wiring TMT125
14 Endress+Hauser
Connector technical data:
• Degree of protection IP 67
• Ambient temperature: –40 to +150 °C (-40 to 302 °F)
4.3 Fieldbus cable specifications
Cable type
Twin-core cables are required for connecting the device to the FOUNDATION Fieldbus™ H1. Fol-
lowing 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 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
described 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 (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
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).
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.
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 Ω/km 112 Ω/km
Characteristic impedance at 31.25 kHz 100 Ω± 20% 100 Ω± 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 >1 m) 1900 m 1200 m
* Not specified

TMT125 4 Wiring
Endress+Hauser 15
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):
Number of field devices
In accordance with IEC 61158-2 (MBP), a maximum of 32 field devices can be connected per field-
bus 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.
Shielding and grounding
Optimum electromagnetic compatibility 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 optimum shield effect, connect the shield as often as possible to the reference ground.
Where applicable, national installation regulations and guidelines must be observed!
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.
"Caution!
If the shielding of the cable is grounded at more than one point in systems without potential match-
ing, power supply frequency equalizing currents can occur that damage the bus cable or shielding
or have a serious effect on signal transmission.
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.
Further information
General information and further pointers on wiring can be found on www.fieldbus.org, the website
of the FOUNDATION Fieldbus™.
Number of spurs 1 to 12 13 to 14 15 to 18 19 to 24 25 to 32
Max. length per spur 120 m 90 m 60 m 30 m 1 m

4 Wiring TMT125
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4.4 Potential equalization
Shielding and grounding of the Transmitter
"Caution!
If the shield of the fieldbus transmission line is grounded for reasons related to EMC, Section
12.2.2.3 of IEC 60079-14 and Sections 6.2 and 6.3 of the FOUNDATION Fieldbus™ Application
Guide 31.35 bit/s Intrinsically Safe Systems must always be observed.
Depending on this the shield is automatically connected to the potential equalization.
Please also refer to Operating Instructions BA 013S/04/en “FOUNDATION Fieldbus™ Overview:
Installation and Commissioning Guidelines” for configuration information.
4.5 Degree of protection
The device conforms to the requirements to IP 67 ingress protection for the field housing version.
In order to fulfill an IP 67 degree of protection after installation or service, the following points must
be taken into consideration:
• The housing seals must be clean and undamaged when inserted into their grooves. The seals must
be dried, cleaned or replaced if necessary.
• All housing screws and screw caps must be firmly tightened.
• The cables used for connection must be of the correct specified outside diameter (e.g. M20 x 1.5,
cable diameter from 8 to 12 mm; 0.315 to 0.47 in).
• Firmly tighten the cable gland ( → fig. 8 and → chap. 4.2.1).
• The cables must loop down before they enter the cable glands (“water trap”, → fig. 8). This
means that any moisture that may form cannot enter the gland. Install the device so that the cable
glands are not facing upwards.
• Cable glands not used are to be blanked off using stop plugs.
• Do not remove the grommet from the cable gland.
F06-xxxxxxxx-04-xx-xx-xx-005
Fig. 8: Connection hints to retain IP 67 protection
The terminal S of the intrinsically safe fieldbus segment is:
• in case of using the field housing version connected internally to the housing. The housing should be connected to
the potential equalization.
#Warning!
The housing of the field housing version must be connected to the potential equalization in case of Category 2G
(Zone 1) applications.
• in case of using the DIN rail version connected internally to the DIN rail. The DIN rail should be connected to the
cabinet and the cabinet should be connected to the potential equalization.

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4.6 Post-connection check
After the electrical installation of the device, always perform the following final checks:
Device condition and specifications Notes
Are the device or the cables damaged (visual check)? -
Electrical connection Notes
Does the supply voltage match the device specification? 9 to 32 V DC
Do the cables used comply with the specifications? → chap. 4.3
→ chap. 10.3
Do the cables have adequate strain relief? -
Are the power supply and fieldbus cables correctly connected? See the wiring diagram →
page 10
Are all terminals firmly tightened? -
Are all the cable glands installed, tightened and sealed?
Cable run with "water trap"?
→ chap. 4.2.1
→ chap. 4.5
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? → chap. 4.3
Has the max. length of the fieldbus cable been observed in accordance with the
FOUNDATION Fieldbus™ specifications?
→ chap. 4.3
→ chap. 4.4
Has the max. length of the spurs been observed in accordance with the FOUNDA-
TION Fieldbus™ specifications?
Is the fieldbus cable fully shielded and correctly grounded?

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5Operation
5.1 Quick operation guide
You have a number of options for configuring and commissioning the device:
1. Configuration programs → page 21
The configuration of FF functions and device-specific parameters is primarily done via the fieldbus
interface. You can obtain special configuration and operating programs from various manufacturers
for these purposes.
2. Miniature switches (DIP switches) for diverse hardware settings → page 22 ff.
You can make diverse hardware settings for the FOUNDATION Fieldbus™ interface using minia-
ture switches (DIP switches) on the transmitter. There are eight DIP switches. Only DIP switch 1
(Simulation) and DIP switch 2 (hardware write protection) are in use.
The DIP-switches for configuration can be activated even during operation.
5.2 Display and Operating elements
A0006341
Fig. 9: Display and operating elements of the transmitter
Item
No.
Function Description
1 Green lit LED signalizes ’Power on’
2 Red lit or flashing LED signalizes communication status: hardware or communica-
tion error
3 Red flashing LEDs signalizes connected sensor status: sensor errors (over-
/underrange, wiring error, leadbreakage)
4 DIP switches switches for hardware settings (only switch 1 and 2 are in
use): Simulation ON/OFF; Hardware write protection
ON/OFF
5 Segregation plate required for installation in hazardous area category 3 (see
separate Safety Instruction for use in hazardous areas)
6 Service interface for E+H service only

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5.3 FOUNDATION Fieldbus™ technology
The FOUNDATION Fieldbus™ (FF) is a purely digital, serial communication system that connects
fieldbus devices (sensors, actors), automation and process control systems with each other. As a
local communications network (LAN) for field devices the FF was primarily designed for the require-
ments 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.
5.3.1 System architecture
The following figure shows an example of a FOUNDATION Fieldbus™ network with the associated
components. It also shows the possibilities of device installation in hazardous areas.
A0006754-EN
Fig. 10: FOUNDATION Fieldbus™ system architecture including associated components
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 Ethernet - HSE)
(Control Net)
– A H1 card is required for direct connection to a process control system.
– System inputs are available directly for H1 and H2 (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 fol-
lowing IEC 61158-2. The H1 bus system allows simultaneous feed to the field devices and data
transfer on the two-wire line.

5 Operation TMT125
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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 is
connected in parallel to the bus line. Devices requiring external power must use a separate power
supply.
• One of the most common network structures is the line structure. Star, tree or mixed network
structures are also possible using connecting components (junction boxes).
• The bus connection to the individual fieldbus devices is achieved by means of a T-connector or
via a spur. This has the advantage that individual fieldbus devices can be connected or discon-
nected without interrupting the bus or the bus communication.
• The number of connected fieldbus devices depends on various factors, such as use in hazardous
areas, length of spur, cable types, current consumption of field devices etc. ( → page 14).
• If using fieldbus devices in a hazardous area, the H1 bus must be equipped with an intrinsically
safe barrier before the transition to the hazardous area.
• A bus terminator is required at each end of the bus segment.
High Speed Ethernet (HSE):
The superior H2 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-net-
works and/or where there is a large number of network users.
5.3.2 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 pro-
cess and diagnosis information are only transferred to the fieldbus when needed. This data transfer
is always carried out in the intervals between timed communication.
5.3.3 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 ( →
page 23). It remains stored in the device even during a supply voltage failure.
5.3.4 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’
Actuating valves normally have the function blocks:
•’AnalogOutput’
!Note!
More information on this can be found on → page 42 onwards.