Danfoss VLT 5000 Series, Руководство по эксплуатации

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VLT® 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA PROFIBUS
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Diagram bus connection
It is important to terminate the bus line correctly.
Mismatches of the impedance may lead to reflections
in the line and cause incorrect transmissions.
- The PROFIBUS option card is equipped with a
suitable termination which can be activated by
the switches 1 and 2 at the switch block S1
directly to the right above the terminal block
MK 1B. The bus termination is active when the
switch is in the "ON" position.
NB!:
The switches must never be set in
opposite directions. Both switches must
be set to ON or OFF.
- Most masters and repeaters are equipped
with their own termination.
- If an internal termination circuit in the form of
three resistors is connected to the bus line, a
5 V direct voltage must be used. Attention:
please make sure that it is voltaically separated
from the power supply cable.
MG.90.G1.02 - VLT is a registered Danfoss trademark
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