Acronyms and abbreviations
6 TTH200, TTR200, TTH300, TTF300, TTF350 SM/TTX200/TTX300/SIL-EN
Acronym /
Abbrevia-
tion
English Description
closed coupled Short connecting lead to the temperature sensor, less
than 1 m (39.37 inches) in length and connecting lead
laid with mechanical protection.
extension wire Long connecting lead to the temperature sensor, more
than 1 m (39.37 inches) in length or connecting lead laid
without mechanical protection.
low stress Low to medium load according to data sheet
specification (sensor exposed to temperature and
mechanical load)
high stress High load according to data sheet specification (sensor
exposed to temperature and mechanical load)
Single
Configuration
Single configuration, i.e. use of one transmitter per
measuring point. This results in an HFT = 0 (1oo1
architecture) for corresponding SIL2.
Dual Configuration Dual configuration, i.e. use of two transmitters per
measuring point. In this configuration the two current
signals 4 … 20 mA have to be evaluated accordingly by
the downstream logics unit
(a DCS, for example). This results in an HFT = 1 (1oo2
architecture) for corresponding SIL3.
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