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 AFD (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 AFD is to be connected to a
given master, use parallel connections.
In order to avoid potential equalizing currents in the
shield, the cable shield can be grounded 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.80.A7.22 - VLT is a registered Danfoss trademark
74
Rosewood STP ST42 General (Operation and Maintenance Manual - Part 4:
Section 6.3 Manufacturers Manuals 6.3.33 Danfoss VLT Aquadrive 8000) Vendor Manual
QP Id: VM207
Active: 03/09/2013
Page 80 of 208