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2 SensyTemp TSP SM/TSP/SIL-EN
Contents
1
Field of Application .............................................................................................................................................4
2 Acronyms and abbreviations.............................................................................................................................4
4 Other applicable documents and papers..........................................................................................................6
5 Terms and definitions .........................................................................................................................................7
Temperature monitoring of solids, fluids and gases of all types in containers and pipes
according to the special safety engineering requirements of IEC 61508.
The operating limits are defined in the data sheets and operating instructions for the separate
models. In case of questions, please contact your ABB partner.
2 Acronyms and abbreviations
Acronym /
Abbreviation
Designation Description
HFT Hardware Fault
Tolerance
The hardware fault tolerance of the device.
This is the capability of a functional unit to continue the
execution of the demanded function in case of faults or
deviations.
MTBF Mean Time
This is the mean time period between two failures.
Between Failures
MTTR Mean Time To
Repair
PFD Probability of
Failure on
This is the mean time period between the occurrence of
a failure in a device or system and its repair.
This is the likelihood of dangerous safety function
failures occurring on demand.
Demand
PFDAVG Average
Probability of
This is the average likelihood of dangerous safety
function failures occurring on demand.
Failure on
Demand
SIL Safety Integrity
Level
The international standard IEC 61508 specifies four
discrete safety integrity levels (SIL 1 to SIL 4). Each
level corresponds to a specific probability range
regarding the failure of a safety function. The higher the
safety integrity level of the safety-related systems, the
lower likelihood of non-execution of the demanded
safety functions.
SFF Safe Failure
Fraction
The fraction of non-hazardous failures, i.e. the fraction of
failures without the potential to set the safety-related
system to a dangerous or impermissible state.
Low demand
mode
Low demand
mode of
operation
Measuring mode with low demand rate. Measuring
mode, in which the demand rate for the safety-related
system is not more than once a year and is not greater
than double the frequency of the periodic test.
DCS Distributed
Control System
Control systems that are used in industrial engineering
applications to monitor and control distributed
equipment.
4 SensyTemp TSP SM/TSP/SIL-EN
Acronyms and abbreviations
Acronym /
Abbreviation
HMI Human Machine
DTM Device Type
LRV Device
URV Device
Multidrop Multidrop mode In multidrop mode, up to 15 field devices are connected
Designation Description
Here, the HMI is the combined module consisting of
Interface
Manager
Configuration
Configuration
LCD and local keypad.
The DTM is a software module that provides functions
for accessing device parameters, configuring and
operating the devices and diagnosing problems. By
itself, a DTM is not executable software. It only 'comes
to life' in an so called FDT 'container' program.
Lower Range Value of the measurement range
Upper Range Value of the measurement range
in parallel to a single wire pair. The analog current signal
serves just to energize the two-wire devices providing a
fixed current of 4mA.
SM/TSP/SIL-EN SensyTemp TSP 5
Relevant standards
3 Relevant standards
Standard Designation
IEC 61508, Part 1 to 7 Functional safety of electrical/electronic/programmable electronic
safety-related systems
4 Other applicable documents and papers
Observe the following documents in addition to the safety information:
Product name Document name Designation and application
Documents are available in the respective languages: -DE German, -EN English, -FR French,
etc.
These are available on the ABB internet at
www.abb.com/temperature.
In addition, the user of this device is responsible for ensuring compliance with the respective
legal regulations and standards.
6 SensyTemp TSP SM/TSP/SIL-EN
Terms and definitions
5 Terms and definitions
Terms Definitions
Dangerous failure A failure that has the potential to place the safety-related system in
Safety-related system A safety-related system carries out the safety functions that are
a dangerous state or render the system inoperative.
required to achieve or maintain a safe state, e.g., for a system.
Example: A pressure meter, a logics unit (e.g., limit transmitter) and
a valve constitute a safety-related system.
Safety-related
functions
A specified function that is carried out by a safety-related system
with the goal, under consideration of a defined dangerous incident,
of achieving or maintaining a safe state for the system. Example:
limit temperature monitoring.
SM/TSP/SIL-EN SensyTemp TSP 7
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