TESTO 6681 Profibus Instruction Manual page 46

testo 6681 Profibus
46
- 1.3 Commissioning
Alternatively, the transmitter can be connected to the bus system via a T
plug-in connection (3) (accessory 0554 6687).
Using the T plug-in connection (3) the field instruments (4) can be
disconnected during Measuring Mode and the bus communication is not
interrupted. However, the T plug-in connections (3) are only advantageous up
to a transfer speed of 1.5 MBits/s.
Terminating resistor
To prevent disruptions in communication due to reflections, a bus terminator
(1) must be attached to the beginning and end of every bus (2) (accessory
0554 6688).