VLT
®
8000 AQUA
■ Bus connection
The serial bus connection in accordance with the RS
485 (2-conductor) norm is connected to terminals
68/69 of the frequency converter (signals P and N).
Signal P is the positive potential (TX+,RX+), while
signal N is the negative potential (TX-,RX-).
If more than one frequency converter is to be connected
to a given master, use parallel connections.
In order to avoid potential equalizing currents in the
screen, the cable screen can be earthed via terminal
61, which is connected to the frame via an RC-link.
Bus termination
The bus must be terminated by a resistor network
at both ends. For this purpose, set switches 2
and 3 on the control card for "ON".
MG.83.A2.02 - VLT is a registered Danfoss trademark
80
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