KROHNE TT 51 SERIES EN - Manual (Page 3)

INTRODUCTION
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TT 51 SERIES
www.krohne.com 09/2010 - 4000869801 - AD TT 51 SIL R01 en
Introduction
1.1 Field of application
The TT 51 C is a universal, isolated, dual-input temperature transmitter for RTD and
thermocouple sensors. It’s primarily intended to be mounted in a DIN-B housing.
TT 51 R is the rail mounted version of the TT 51 series.
TT 51 C Ex and TT 51 R Ex are the intrinsically safe versions of the TT 51 series. An S is added for
the SIL versions, e.g. TT 51 C ExS.
The TT 51 temperature transmitter utilizes a modular design in hardware as well as in software
to ensure the quality and reliability of the transmitter signal output to meet the special safety
requirements according to IEC 61508-2.
1.2 User benefits
• This intelligent HART ® temperature transmitter is designed to perform temperature
measurements of solids, fluids and gases up to SIL2 according to special safety requirements
of IEC 61508-2 (see exida FMEDA report KROHNE 09/12-72 R011).
• Remote configuration with process control system, PC or HART ® hand terminal is not not not not
possible in combination with SIL activation to prevent unintended changes, only read-out of
parameters from the unit is possible via HART
® . To change settings or deactivate the SIL
function the software ConSoft and USB-kit ICON must be used.
• Continuous measurement
• Easy commissioning
SIL2 requirements are based on the standards current at the time of certification.
The TT 51 S certification involves the HW assessment of the TT 51 S products with an FMEDA.
1.3 Manufacturer’s safety instructions
The measuring device has been built and tested in accordance with the current state of the art,
and complies with the relevant safety standards.
However, dangers may arise from improper use or use for other than intended purpose.
For this reason, observe all the safety instructions in this document carefully.
INFORMATION!
This "Safety manual" is a complement to the regular handbook.
In addition to the safety rules in this documentation, national and regional safety rules and
industrial safety regulations must also be observed.
.book Page 3 Thursday, September 9, 2010 4:19 PM