Siemens SITRANS TH320 User manual

SITRANS
Temperature transmitter
SITRANS TH320/TH420/TR320/
TR420 (mA/HART)
Operating Instructions
7NG031.. (TH320 mA)
7NG041.. (TH420 mA/HART)
7NG032.. (TR320 mA)
7NG042.. (TR420 mA/HART)
03/2018
A5E41864807-AA
Quick start 1
Introduction 2
Safety notes 3
Description 4
Installing/mounting 5
Connecting 6
Commissioning 7
Parameter assignment 8
Service and maintenance 9
Diagnostics and
troubleshooting 10
Technical data 11
Dimension drawings 12
Appendix A

Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
personnel are those who, based on their training and experience, are capable of identifying risks and avoiding
potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in
this publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E41864807
Ⓟ 05/2018 Subject to change
Copyright © Siemens AG 2018.
All rights reserved

Table of contents
1 Quick start....................................................................................................................................................7
1.1 Commissioning SITRANS TH320 (mA)...................................................................................7
1.2 Commissioning SITRANS TH320 (HART)...............................................................................8
1.3 Commissioning SITRANS TH420 (HART)...............................................................................8
1.4 Commissioning SITRANS TR320 (mA)...................................................................................9
1.5 Commissioning SITRANS TR320 (HART).............................................................................10
1.6 Commissioning SITRANS TR420 (HART).............................................................................11
2 Introduction.................................................................................................................................................13
2.1 Purpose of this documentation...............................................................................................13
2.2 Functional Safety Manual.......................................................................................................13
2.3 Document history...................................................................................................................13
2.4 Product compatibility..............................................................................................................13
2.5 USB modem: Information on industrial use............................................................................14
2.6 Checking the consignment.....................................................................................................14
2.7 Security information...............................................................................................................14
2.8 Transportation and storage....................................................................................................15
2.9 Notes on warranty..................................................................................................................15
3 Safety notes................................................................................................................................................17
3.1 Prerequisites for safe use......................................................................................................17
3.1.1 Warning symbols on the device.............................................................................................17
3.1.2 Laws and directives................................................................................................................17
3.1.3 USB modem: Laws and directives.........................................................................................17
3.1.4 Conformity with European directives......................................................................................18
3.1.5 USB modem: Conformity with European directives...............................................................18
3.2 Requirements for special applications...................................................................................18
3.3 Use in hazardous areas.........................................................................................................19
4 Description..................................................................................................................................................21
4.1 SITRANS TH..........................................................................................................................21
4.1.1 Area of application.................................................................................................................21
4.1.2 Structure.................................................................................................................................22
4.1.3 Meaning of the jumper positions............................................................................................23
4.1.4 Nameplate layout SITRANS TH.............................................................................................23
4.1.5 LED function...........................................................................................................................24
4.1.6 Test terminals.........................................................................................................................25
4.1.7 How TH320 works..................................................................................................................26
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 3

4.1.8 How TH420 works..................................................................................................................27
4.1.9 HART communication............................................................................................................28
4.1.9.1 HART communication with supply from voltage source.........................................................28
4.1.9.2 HART communication with supply via isolating power supply...............................................29
4.2 SITRANS TR..........................................................................................................................30
4.2.1 Area of application.................................................................................................................30
4.2.2 Structure.................................................................................................................................31
4.2.3 Meaning of the jumper positions............................................................................................32
4.2.4 Nameplate layout SITRANS TR.............................................................................................33
4.2.5 LED function...........................................................................................................................33
4.2.6 Test terminals.........................................................................................................................34
4.2.7 How TR320 works..................................................................................................................35
4.2.8 How TR420 works..................................................................................................................36
4.2.9 HART communication............................................................................................................37
4.2.9.1 HART communication with supply from voltage source.........................................................37
4.2.9.2 HART communication with supply via isolating power supply...............................................38
4.3 USB modem and SIPROM T.................................................................................................38
4.3.1 Applications............................................................................................................................38
4.3.2 Product features.....................................................................................................................39
4.3.3 Meaning of LEDs on the USB modem...................................................................................39
5 Installing/mounting......................................................................................................................................41
5.1 Basic safety notes..................................................................................................................41
5.1.1 ATEX/IECEx and others.........................................................................................................41
5.1.1.1 Safety information for installation in "Intrinsic safety "ia/ib"....................................................41
5.1.1.2 Safety information for installation in "Non-sparking nA/ec" and "Intrinsic safety ic"...............42
5.1.2 FM/CSA..................................................................................................................................43
5.1.2.1 Safety information for installation in "Intrinsic safety "ia"........................................................43
5.1.2.2 Safety information for installation in "Non Incendive nA".......................................................44
5.2 Installing SITRANS TH in a connection head........................................................................44
5.3 Installing SITRANS TH on DIN rail and G rail........................................................................46
5.4 Installing SITRANS TR on DIN rail.........................................................................................46
5.5 Removing...............................................................................................................................47
6 Connecting.................................................................................................................................................49
6.1 Basic safety notes..................................................................................................................49
6.2 Connecting TH320.................................................................................................................51
6.3 Connecting TH420.................................................................................................................52
6.4 Connecting TR320.................................................................................................................53
6.5 Connecting TR420.................................................................................................................55
7 Commissioning...........................................................................................................................................57
7.1 Basic safety notes..................................................................................................................57
7.2 Commissioning SITRANS TH320 (mA).................................................................................57
7.3 Commissioning SITRANS TH320 (HART).............................................................................58
7.4 Commissioning SITRANS TH420 (HART).............................................................................59
Table of contents
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
4Operating Instructions, 03/2018, A5E41864807-AA

7.5 Commissioning SITRANS TR320 (mA).................................................................................60
7.6 Commissioning SITRANS TR320 (HART).............................................................................60
7.7 Commissioning SITRANS TR420 (HART).............................................................................61
7.8 Switching on the supply voltage.............................................................................................62
7.9 Commissioning the USB modem and SIPROM T..................................................................63
7.9.1 Fundamental safety instructions............................................................................................63
7.9.2 Installing the SIPROM T parameterization software..............................................................63
7.9.3 Connecting USB modem........................................................................................................65
8 Parameter assignment...............................................................................................................................67
8.1 Parameter assignment of device with USB modem and SIPROM T.....................................67
8.2 Parameter assignment over remote operation.......................................................................68
8.2.1 SIMATIC PDM........................................................................................................................68
8.2.2 Advanced functions................................................................................................................68
8.2.3 Dynamic variable mapping.....................................................................................................69
8.3 Locking the device.................................................................................................................70
8.3.1 Write protection......................................................................................................................70
8.3.2 Change user PIN....................................................................................................................70
9 Service and maintenance...........................................................................................................................71
9.1 Basic safety notes..................................................................................................................71
9.1.1 Maintenance...........................................................................................................................71
9.2 Cleaning.................................................................................................................................71
9.3 Maintenance and repair work.................................................................................................72
9.3.1 Uninstalling USB drivers........................................................................................................72
9.4 Absence of pollutants.............................................................................................................74
9.5 Return procedure...................................................................................................................74
9.6 Disposal.................................................................................................................................75
10 Diagnostics and troubleshooting................................................................................................................77
10.1 Troubleshooting of USB modem............................................................................................77
11 Technical data............................................................................................................................................79
11.1 Ambient conditions.................................................................................................................79
11.2 Construction...........................................................................................................................79
11.3 Common specifications..........................................................................................................80
11.4 Input accuracies.....................................................................................................................81
11.5 Output accuracies..................................................................................................................83
11.6 Input.......................................................................................................................................83
11.6.1 RTD........................................................................................................................................83
11.6.2 TC..........................................................................................................................................84
11.6.3 Linear resistance....................................................................................................................85
11.6.4 Potentiometer.........................................................................................................................85
11.6.5 Voltage...................................................................................................................................86
Table of contents
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
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11.7 Output specifications and HART............................................................................................86
11.8 Certificates and approvals......................................................................................................87
11.8.1 ATEX/IECEx and related........................................................................................................87
11.8.2 FM/CSA..................................................................................................................................92
11.9 Factory settings......................................................................................................................95
11.9.1 Factory setting SITRANS TH320/TR320...............................................................................95
11.9.2 Factory setting SITRANS TH420/TR420...............................................................................96
11.10 USB modem...........................................................................................................................96
12 Dimension drawings...................................................................................................................................97
12.1 Dimension drawings SITRANS TH320/TH420.......................................................................97
12.2 Dimension drawings SITRANS TR320/TR420.......................................................................97
A Appendix.....................................................................................................................................................99
A.1 Technical support...................................................................................................................99
A.2 Certificates.............................................................................................................................99
A.3 QR code label......................................................................................................................100
A.4 Accuracy calculation examples............................................................................................100
A.5 Programmable sensor input and current output limits..........................................................101
Index.........................................................................................................................................................103
Table of contents
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
6Operating Instructions, 03/2018, A5E41864807-AA

Quick start 1
1.1 Commissioning SITRANS TH320 (mA)
Introduction
In this section, you will learn how to commission the device step-by-step.
Before you start, please read the following safety notes:
● General safety notes (Page 17)
● Basic safety notes: Installing/mounting (Page 41)
● Basic safety notes: Connecting (Page 49)
● Basic safety notes: Commissioning (Page 57)
Read the entire device manual in order to achieve the optimum performance of the device.
Procedure
1. If you want to change the factory settings, configure the device using the USB modem and
the SIPROM T parameter assignment software.
Parameter assignment of device with USB modem and SIPROM T (Page 67)
2. Install the device.
Installing SITRANS TH in a connection head (Page 44)
Installing SITRANS TH on DIN rail and G rail (Page 46)
3. Connect the device.
Connecting TH320 (Page 51)
4. Switch on the power supply.
Switching on the supply voltage (Page 62)
5. Wait for 2 seconds.
After this startup time, the device is operational.
6. Wait 5 minutes to get exact measured values.
Result
The LED is lit green.
Structure (Page 22)
See also
Diagnostics and troubleshooting (Page 77)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 7

1.2 Commissioning SITRANS TH320 (HART)
Introduction
In this section, you will learn how to commission the device step-by-step.
Before you start, please read the following safety notes:
● General safety notes (Page 17)
● Basic safety notes: Installing/mounting (Page 41)
● Basic safety notes: Connecting (Page 49)
● Basic safety notes: Commissioning (Page 57)
Read the entire device manual in order to achieve the optimum performance of the device.
Procedure
1. Install the device.
Installing SITRANS TH in a connection head (Page 44)
Installing SITRANS TH on DIN rail and G rail (Page 46)
2. Connect the device.
Connecting TH320 (Page 51)
3. Switch on the power supply.
Switching on the supply voltage (Page 62)
4. Wait for 2 seconds.
After this startup time, the device is operational.
5. Wait 5 minutes to get exact measured values.
6. If you want to change the factory settings, configure the device using remote operation.
Parameter assignment over remote operation (Page 68)
Result
The LED is lit green.
Structure (Page 22)
See also
Diagnostics and troubleshooting (Page 77)
1.3 Commissioning SITRANS TH420 (HART)
Introduction
In this section, you will learn how to commission the device step-by-step.
Quick start
1.3 Commissioning SITRANS TH420 (HART)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
8Operating Instructions, 03/2018, A5E41864807-AA

Before you start, please read the following safety notes:
● General safety notes (Page 17)
● Basic safety notes: Installing/mounting (Page 41)
● Basic safety notes: Connecting (Page 49)
● Basic safety notes: Commissioning (Page 57)
Read the entire device manual in order to achieve the optimum performance of the device.
Procedure
1. Install the device.
Installing SITRANS TH in a connection head (Page 44)
Installing SITRANS TH on DIN rail and G rail (Page 46)
2. Connect the device.
Connecting TH420 (Page 52)
3. Switch on the power supply.
Switching on the supply voltage (Page 62)
4. Wait for 2 seconds.
After this startup time, the device is operational.
5. Wait 5 minutes to get exact measured values.
6. If you want to change the factory settings, configure the device using remote operation.
Parameter assignment over remote operation (Page 68)
Result
The LED is lit green.
Structure (Page 22)
See also
Diagnostics and troubleshooting (Page 77)
1.4 Commissioning SITRANS TR320 (mA)
Introduction
In this section, you will learn how to commission the device step-by-step.
Before you start, please read the following safety notes:
● General safety notes (Page 17)
● Basic safety notes: Installing/mounting (Page 41)
Quick start
1.4 Commissioning SITRANS TR320 (mA)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 9

● Basic safety notes: Connecting (Page 49)
● Basic safety notes: Commissioning (Page 57)
Read the entire device manual in order to achieve the optimum performance of the device.
Procedure
1. If you want to change the factory settings, configure the device using the USB modem and
the SIPROM T parameter assignment software.
Parameter assignment of device with USB modem and SIPROM T (Page 67)
2. Mount the device.
Installing SITRANS TR on DIN rail (Page 46)
3. Connect the device.
Connecting TR320 (Page 53)
4. Switch on the power supply.
Switching on the supply voltage (Page 62)
5. Wait for 2 seconds.
After this startup time, the device is operational.
6. Wait 5 minutes to get exact measured values.
Result
The LED is lit green.
Structure (Page 31)
See also
Diagnostics and troubleshooting (Page 77)
1.5 Commissioning SITRANS TR320 (HART)
Introduction
In this section, you will learn how to commission the device step-by-step.
Before you start, please read the following safety notes:
● General safety notes (Page 17)
● Basic safety notes: Installing/mounting (Page 41)
● Basic safety notes: Connecting (Page 49)
● Basic safety notes: Commissioning (Page 57)
Read the entire device manual in order to achieve the optimum performance of the device.
Quick start
1.5 Commissioning SITRANS TR320 (HART)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
10 Operating Instructions, 03/2018, A5E41864807-AA

Procedure
1. Mount the device.
Installing SITRANS TR on DIN rail (Page 46)
2. Connect the device.
Connecting TR320 (Page 53)
3. Switch on the power supply.
Switching on the supply voltage (Page 62)
4. Wait for 2 seconds.
After this startup time, the device is operational.
5. Wait 5 minutes to get exact measured values.
6. If you want to change the factory settings, configure the device using remote operation.
Parameter assignment over remote operation (Page 68)
Result
The LED is lit green.
Structure (Page 31)
See also
Diagnostics and troubleshooting (Page 77)
1.6 Commissioning SITRANS TR420 (HART)
Introduction
In this section, you will learn how to commission the device step-by-step.
Before you start, please read the following safety notes:
● General safety notes (Page 17)
● Basic safety notes: Installing/mounting (Page 41)
● Basic safety notes: Connecting (Page 49)
● Basic safety notes: Commissioning (Page 57)
Read the entire device manual in order to achieve the optimum performance of the device.
Procedure
1. Mount the device.
Installing SITRANS TR on DIN rail (Page 46)
2. Connect the device.
Connecting TR420 (Page 55)
Quick start
1.6 Commissioning SITRANS TR420 (HART)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 11

3. Switch on the power supply.
Switching on the supply voltage (Page 62)
4. Wait for 2 seconds.
After this startup time, the device is operational.
5. Wait 5 minutes to get exact measured values.
6. If you want to change the factory settings, configure the device using remote operation.
Parameter assignment over remote operation (Page 68)
Result
The LED is lit green.
Structure (Page 31)
See also
Diagnostics and troubleshooting (Page 77)
Quick start
1.6 Commissioning SITRANS TR420 (HART)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
12 Operating Instructions, 03/2018, A5E41864807-AA

Introduction 2
2.1 Purpose of this documentation
These instructions contain all information required to commission and use the device. Read
the instructions carefully prior to installation and commissioning. In order to use the device
correctly, first review its principle of operation.
The instructions are aimed at persons mechanically installing the device, connecting it
electronically, configuring the parameters and commissioning it, as well as service and
maintenance engineers.
2.2 Functional Safety Manual
For instructions and further information for functional safety of SITRANS TH and SITRANS TR
temperaure transmitters refer to the English version of the Functional Safety Manual
Instructions and manuals (http://www.siemens.com/processinstrumentation/documentation).
Document number: A5E41864869
2.3 Document history
The following table contains the major changes in the documentation compared to the previous
edition.
Edition Comment
03/2018 First edition
2.4 Product compatibility
The following table describes the compatibility between the edition of this manual, the device
revision, the engineering system and the associated EDD.
Manual
edition
Comments Device revision Compatible version of device integration package
03/2018 First edition HART 7
01.00.00 or higher
SIMATIC PDM V9.1 EDD: 01.00.00 or higher
AMS Device Manager V13.3 EDD: 01.00.00 or higher
SITRANS DTM V4.1 EDD: 01.00.00 or higher
Field Communicator FC
375/475
EDD: 01.00.00 or higher
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 13

2.5 USB modem: Information on industrial use
NOTICE
Use in a domestic environment
This Class A Group 1 equipment is intended for use in industrial areas.
In a domestic environment this device may cause radio interference.
2.6 Checking the consignment
1. Check the packaging and the delivered items for visible damages.
2. Report any claims for damages immediately to the shipping company.
3. Retain damaged parts for clarification.
4. Check the scope of delivery by comparing your order to the shipping documents for
correctness and completeness.
WARNING
Using a damaged or incomplete device
Risk of explosion in hazardous areas.
● Do not use damaged or incomplete devices.
2.7 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines, and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the internet if and to the extent such a connection is necessary
and only when appropriate security measures (e.g. firewalls and/or network segmentation) are
in place.
For additional information on industrial security measures that may be implemented, please
visit:
https://www.siemens.com/industrialsecurity
Siemens’ products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customer’s exposure to cyber
threats.
Introduction
2.7 Security information
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
14 Operating Instructions, 03/2018, A5E41864807-AA

To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
https://www.siemens.com/industrialsecurity.
2.8 Transportation and storage
To guarantee sufficient protection during transport and storage, observe the following:
● Keep the original packaging for subsequent transportation.
● Devices/replacement parts should be returned in their original packaging.
● If the original packaging is no longer available, ensure that all shipments are properly
packaged to provide sufficient protection during transport. Siemens cannot assume liability
for any costs associated with transportation damages.
NOTICE
Insufficient protection during storage
The packaging only provides limited protection against moisture and infiltration.
● Provide additional packaging as necessary.
Special conditions for storage and transportation of the device are listed in Technical data
(Page 79).
2.9 Notes on warranty
The contents of this manual shall not become part of or modify any prior or existing agreement,
commitment or legal relationship. The sales contract contains all obligations on the part of
Siemens as well as the complete and solely applicable warranty conditions. Any statements
regarding device versions described in the manual do not create new warranties or modify the
existing warranty.
The content reflects the technical status at the time of publishing. Siemens reserves the right
to make technical changes in the course of further development.
Introduction
2.9 Notes on warranty
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 15

Introduction
2.9 Notes on warranty
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
16 Operating Instructions, 03/2018, A5E41864807-AA

Safety notes 3
3.1 Prerequisites for safe use
This device left the factory in good working condition. In order to maintain this status and to
ensure safe operation of the device, observe these instructions and all the specifications
relevant to safety.
Observe the information and symbols on the device. Do not remove any information or symbols
from the device. Always keep the information and symbols in a completely legible state.
3.1.1 Warning symbols on the device
Symbol Explanation
Consult operating instructions
3.1.2 Laws and directives
Observe the safety rules, provisions and laws applicable in your country during connection,
assembly and operation. These include, for example:
● National Electrical Code (NEC - NFPA 70) (USA)
● Canadian Electrical Code (CEC) (Canada)
Further provisions for hazardous area applications are for example:
● IEC 60079-14 (international)
● EN 60079-14 (EU)
3.1.3 USB modem: Laws and directives
Observe the safety regulations, provisions and laws applicable in your country during
connection, installation and operation. These include, for example:
● National Electrical Code (NEC - NFPA 70) (USA)
● Canadian Electrical Code (CEC) (Canada)
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 17

3.1.4 Conformity with European directives
The CE mark on the device is a sign of conformity with the following European directives:
Electromagnetic compatibili‐
ty EMC
2014/30/EU
Directive of the European Parliament and of the Council on the
harmonization of the laws of the Member States relating to elec‐
tromagnetic compatibility
Atmosphère explosible
ATEX
2014/34/EU
Directive of the European Parliament and of the Council on the
harmonization of the laws of the Member States relating to equip‐
ment and protective systems intended for use in potentially ex‐
plosive atmospheres
The applicable directives can be found in the EU conformity declaration of the specific device.
3.1.5 USB modem: Conformity with European directives
The CE mark on the device is a sign of conformity with the following European directives:
Electromagnetic Compatibili‐
ty EMC
2014/30/EU
Directive of the European Parliament and of the Council on the
harmonization of the laws of the Member States relating to elec‐
tromagnetic compatibility
The applicable directives can be found in the EU conformity declaration of the specific device.
WARNING
Improper device modifications
Risk to personnel, system and environment can result from modifications to the device,
particularly in hazardous areas.
● Only carry out modifications that are described in the instructions for the device. Failure
to observe this requirement cancels the manufacturer's warranty and the product
approvals.
3.2 Requirements for special applications
Due to the large number of possible applications, each detail of the described device versions
for each possible scenario during commissioning, operation, maintenance or operation in
systems cannot be considered in the instructions. If you need additional information not
covered by these instructions, contact your local Siemens office or company representative.
Note
Operation under special ambient conditions
We highly recommend that you contact your Siemens representative or our application
department before you operate the device under special ambient conditions as can be
encountered in nuclear power plants or when the device is used for research and development
purposes.
Safety notes
3.2 Requirements for special applications
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
18 Operating Instructions, 03/2018, A5E41864807-AA

3.3 Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous
area must have the following specific qualifications:
● They are authorized, trained or instructed in operating and maintaining devices and systems
according to the safety regulations for electrical circuits, high pressures, aggressive, and
hazardous media.
● They are authorized, trained, or instructed in carrying out work on electrical circuits for
hazardous systems.
● They are trained or instructed in maintenance and use of appropriate safety equipment
according to the pertinent safety regulations.
WARNING
Use in hazardous area
Risk of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labelled
accordingly.
● Don't use devices that have been operated outside the conditions secified for hazardous
areas. If you have used the device outside the conditions for hazardous areas permanently
make all Ex markings unrecognizable on the nameplate.
WARNING
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device has already been operated in non-intrinsically safe circuits or the electrical
specifications have not been observed, the safety of the device is no longer ensured for use
in hazardous areas. There is a risk of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe
circuit.
● Observe the specifications for the electrical data on the certificate and/or in Technical
data (Page 79).
Safety notes
3.3 Use in hazardous areas
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
Operating Instructions, 03/2018, A5E41864807-AA 19

Safety notes
3.3 Use in hazardous areas
SITRANS TH320/TH420/TR320/TR420 (mA/HART)
20 Operating Instructions, 03/2018, A5E41864807-AA